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Regional Report: Boulder Co., Colorado, USA

For full locality listing click here. Alternatively: Click here for heirarchical list of localities in Boulder Co., Colorado, USA

  • Acanthite - 121, 429, 386, 906, 74, 338, 641
  • Actinolite - 867, 612
  • 'Adularia' - 94, 71
  • Aegirine - 8
  • Aikinite - 104, 386, 147, 273
  • Alabandite - 262
  • Albite - 573
  • 'Albite-Anorthite Series' - 57, 58
  • 'Allanite' - 252
  • Allanite-(Ce) - 493, 690, 798, 842, 799
  • Allophane - 563, 268
  • Altaite - 563, 408, 661, 493, 671, 459, 14, 147, 304, 517, 574, 647, 670, 672, 673, 703, 717, 323
  • Alunite - 493
  • Amalgam - 416, 20, 263, 722
  • Analcime - 696
  • Anatase - 753
  • Andalusite - 221
  • Anglesite - 641, 377
  • Anhydrite - 386, 112, 716
  • Anthophyllite - 382
  • Antimony - 295
  • 'Apatite' - 563, 334, 414, 899
  • Arfvedsonite - 386, 690, 252
  • Arsenic - 95
  • Arsenopyrite - 169, 25, 27, 325
  • 'Asbestos' - 8, 725
  • Augite - 120
  • Aurichalcite - 386
  • Autunite - 132, 245, 309, 438
  • Azurite - 80, 582, 170, 377
  • Baryte - 429, 906, 754, 28, 535
  • Bassetite - 247
  • 'Bastnäsite' - 690
  • Bastnäsite-(Ce) - 252
  • Beidellite - 563, 144, 94
  • Beryl - 54, 55, 157, 458, 56, 57, 58, 538, 573, 918
  • Biotite - 918, 382, 92
  • Bismuth - 386, 437, 295
  • Bismuthinite - 386, 437, 738
  • Bismutite - 437
  • Bornite - 386, 334, 891, 459, 203, 242
  • Boulangerite - 672
  • Bravoite - 169, 388, 605
  • Briartite - 386
  • Britholite-(Ce) - 690, 252
  • Brucite - 400
  • Buckhornite - 104
  • Calaverite - 416, 563, 104, 546, 661, 493, 401, 459, 107, 147, 151, 634, 717, 870
  • Calcite - 386, 334, 725, 12, 94, 863, 899
  • Calomel - 634
  • Cassiterite - 854
  • Celestine - 386, 112, 716
  • Cerite-(Ce) - 402, 690, 798, 842, 799
  • Cerussite - 121, 377
  • Cervelleite - 338
  • Chalcanthite - 386
  • 'Chalcedony' - 493, 94
  • Chalcocite - 891, 80, 242, 431
  • Chalcopyrite - 169, 563, 104, 546, 121, 429, 386, 906, 661, 891, 459, 422, 112, 147, 176, 203, 242, 338, 545, 750, 870, 434, 211, 377, 611, 273
  • Chlorargyrite - 121, 661, 886
  • 'Chlorite Group' - 334, 863
  • 'Chromian Diopside' - 334
  • Chrysocolla - 169, 130, 203, 664, 377
  • Chrysotile - 121, 334
  • Cimolite - 563
  • Cinnabar - 95
  • 'Clay' - 93, 470
  • Clinozoisite - 12
  • Cobaltite - 169
  • Coffinite - 83, 245, 247
  • Coloradoite - 416, 546, 721, 226, 408, 423, 671, 558, 20, 231, 232, 338, 439, 442, 517, 634, 673, 703, 722, 870, 323
  • Columbite - 157, 57, 58, 538, 573
  • Copper - 44, 167, 469
  • Cordierite - 382
  • Corrensite - 194
  • Covellite - 104, 121, 124, 459, 80
  • Cryolite - 386
  • Dawsonite - 891
  • Dickite - 563, 240
  • Digenite - 386, 690, 252
  • Diopside - 120, 12
  • Dolomite - 121
  • Eckermannite - 725
  • 'Electrum' - 563, 124
  • Empressite - 661, 671, 147, 232, 697
  • Enargite - 386, 203
  • Enstatite - 334
  • Epidote - 493, 690, 252
  • Famatinite - 176
  • Ferberite - 563, 83, 601, 25, 51, 87, 144, 148, 161, 176, 204, 240, 262, 270, 325, 341, 350, 370, 414, 433, 466, 483, 498, 518, 531, 533, 539, 591, 595, 613, 616, 620, 626, 631, 657, 665, 666, 741, 775, 786, 872, 873, 874, 875, 924, 316, 279, 528, 179, 71
  • Ferritungstite - 240
  • Ferrotellurite - 416
  • Fizélyite - 459, 422, 122, 338, 415, 672, 718
  • Fluorite - 386, 10, 83, 402, 493, 601, 690, 107, 112, 133, 230, 245, 545, 561, 716, 252, 434, 638
  • Freibergite - 563
  • Fülöppite - 904
  • 'Gadolinite' - 690, 252
  • Gadolinite-(Y) - 401
  • Galena - 563, 104, 121, 386, 906, 74, 83, 661, 601, 671, 124, 8, 70, 112, 147, 164, 236, 247, 296, 483, 582, 602, 641, 672, 725, 848, 911, 928, 94, 377
  • 'Garnet Group' - 55, 382, 863
  • 'Garnierite' - 169
  • Gearksutite - 386, 112, 133
  • Gedrite - 382
  • Geocronite - 386, 377
  • Germanite - 386, 377
  • Gersdorffite - 121
  • Goethite - 563
  • Gold - 416, 104, 546, 721, 121, 906, 661, 671, 124, 459, 558, 422, 2, 6, 8, 11, 15, 19, 31, 33, 35, 37, 44, 49, 51, 53, 59, 61, 63, 70, 82, 86, 96, 102, 105, 110, 111, 115, 129, 130, 131, 133, 135, 137, 145, 146, 147, 151, 165, 167, 168, 171, 172, 183, 191, 192, 203, 206, 223, 229, 232, 234, 240, 241, 250, 265, 266, 272, 275, 280, 287, 288, 292, 296, 298, 303, 304, 305, 306, 308, 309, 311, 313, 322, 325, 330, 336, 338, 350, 355, 364, 366, 381, 388, 389, 400, 404, 417, 420, 427, 432, 439, 441, 442, 443, 447, 450, 451, 456, 457, 464, 465, 466, 469, 476, 485, 508, 515, 516, 517, 520, 521, 522, 525, 549, 551, 566, 570, 571, 572, 576, 586, 589, 591, 604, 608, 609, 610, 613, 621, 630, 632, 634, 651, 652, 667, 669, 672, 676, 686, 687, 693, 695, 697, 702, 703, 711, 717, 722, 724, 725, 726, 727, 744, 748, 752, 756, 767, 783, 800, 801, 802, 803, 804, 805, 806, 807, 808, 809, 810, 811, 812, 813, 814, 815, 816, 817, 818, 819, 820, 821, 822, 823, 824, 825, 826, 827, 828, 829, 830, 831, 832, 833, 834, 835, 843, 844, 845, 846, 847, 870, 879, 883, 885, 893, 898, 903, 912, 915, 923, 928, 738, 718, 428, 362, 640
  • Goldamalgam - 633
  • Goslarite - 386
  • Goyazite - 563, 212, 94
  • Graphite - 161, 714
  • Grossular - 12
  • Halotrichite - 907, 504
  • Haüyne - 17, 467
  • Heazlewoodite - 334
  • Hedenbergite - 12
  • Hematite - 169, 563, 401, 240, 545
  • Hessite - 563, 493, 671, 124, 558, 78, 147, 330, 338, 388, 556, 605, 647, 717, 870, 273
  • 'Heulandite' - 696
  • Hübnerite - 493, 401, 128, 440, 869
  • Illite - 362
  • Ilmenite - 334, 120, 382
  • Ilsemannite - 245, 535
  • Iodargyrite - 661, 493
  • Jalpaite - 121, 906, 641, 211
  • Jamesonite - 632
  • 'K Feldspar' - 157, 458, 8, 56, 58, 224, 359, 649, 725, 918
  • Keystoneite - 416, 546
  • Krennerite - 408, 14, 304, 517, 574, 673
  • Limonite - 169, 563, 70, 502
  • Linarite - 928, 377
  • Magnetite - 334, 382, 611
  • Magnolite - 416, 546
  • Malachite - 169, 55, 157, 582, 170, 377
  • Marcasite - 493, 558, 25, 27, 325, 388, 466, 605, 672
  • Melonite - 416, 264, 408, 124, 459, 14, 231, 232, 265, 305, 385, 388, 432, 517, 605, 673, 717, 756, 870, 913, 323, 720
  • Mercury - 169, 416, 546, 439, 442, 634, 727
  • Miargyrite - 563
  • 'Mica Group' - 157, 458, 56, 58, 863
  • Microcline - 690, 382, 218
  • Millerite - 169
  • Molybdenite - 546, 891, 422, 62, 144, 161, 173, 203, 535, 545, 635, 714, 750, 838, 839, 840, 434, 362
  • 'Monazite' - 690, 252
  • Montanite - 661
  • Montmorillonite - 563, 362
  • Morenosite - 169
  • Muscovite - 56, 224, 360, 573, 837, 918, 382
  • Nagyágite - 690, 124, 459, 558, 422, 78, 107, 388, 556, 672, 870, 252
  • Nickeline - 169
  • Nontronite - 401
  • 'Olivine' - 334, 863
  • Opal - 563, 144
  • Orthoclase - 386, 218
  • Paratacamite - 408
  • Paratellurite - 416, 442
  • Pearceite - 121, 74, 211, 866
  • Pentlandite - 169, 611
  • Petzite - 563, 408, 661, 493, 671, 124, 459, 558, 422, 107, 20, 147, 234, 304, 388, 574, 605, 647, 717, 323, 273
  • Phlogopite - 334
  • 'Picrotitanite' - 863
  • Piemontite - 864
  • 'Pitchblende' - 70, 164, 247, 315, 431, 683, 703, 714
  • Platinum - 119
  • Polybasite - 563, 121, 74
  • Polydymite - 169
  • Posnjakite - 928
  • Prehnite - 92
  • Proustite - 121, 641
  • Pyrargyrite - 121, 386, 155, 330, 556, 641, 870
  • Pyrite - 169, 416, 104, 721, 121, 906, 83, 408, 661, 891, 124, 558, 27, 49, 62, 70, 112, 147, 245, 247, 265, 327, 330, 338, 388, 605, 635, 725, 870, 738, 94, 428, 362, 865, 219, 273
  • Pyrope - 334
  • 'Pyroxene Group' - 725
  • Pyrrhotite - 169, 386, 413, 611
  • Quartz - 169, 416, 546, 721, 121, 386, 906, 83, 212, 408, 661, 891, 601, 124, 422, 107, 8, 27, 49, 57, 58, 62, 70, 87, 148, 161, 203, 232, 234, 240, 245, 304, 338, 388, 439, 466, 517, 574, 605, 635, 641, 670, 672, 673, 725, 727, 775, 870, 874, 918, 738, 12, 382, 316, 279, 179, 362, 377, 757, 638
  • Renierite - 377
  • Rickardite - 107, 151, 442, 634, 640
  • Riebeckite - 386, 671
  • Roscoelite - 416, 546, 493, 107, 234, 466, 535, 717, 219
  • 'Ruby Silver Ore' - 651, 375
  • Rutile - 382
  • Samarskite-(Y) - 891
  • Sanidine - 899
  • Scheelite - 124, 155, 240, 433, 518, 595, 750, 872, 528
  • Schröckingerite - 70
  • Scolecite - 696
  • 'Sericite' - 401, 414
  • 'Serpentine Group' - 334, 120, 863
  • Siderite - 121, 906, 74, 661, 245, 502
  • Sillimanite - 382
  • Silver - 121, 906, 74, 15, 35, 47, 53, 86, 96, 115, 147, 156, 160, 223, 250, 272, 298, 305, 381, 393, 450, 464, 469, 522, 525, 562, 566, 582, 591, 608, 609, 610, 630, 635, 641, 700, 701, 702, 703, 706, 711, 722, 767, 800, 801, 802, 836, 843, 844, 845, 846, 847, 848, 849, 850, 868, 898, 911, 912, 928, 377, 757
  • Sodalite - 467
  • Sphalerite - 169, 104, 121, 386, 906, 661, 493, 601, 124, 422, 70, 176, 245, 582, 602, 632, 641, 672, 725, 848, 911, 928, 434
  • Spinel - 120, 382
  • Stephanite - 121, 928
  • Stibnite - 416, 670, 904, 81
  • Stromeyerite - 121, 176, 329, 928, 324
  • Stützite - 721, 661, 671, 124, 78, 231
  • Sulphur - 386
  • Sylvanite - 416, 546, 721, 408, 661, 890, 896, 124, 78, 107, 14, 19, 20, 51, 70, 147, 151, 231, 265, 305, 325, 327, 350, 388, 432, 439, 442, 466, 494, 517, 634, 647, 666, 673, 697, 870, 323, 219
  • Tantalite - 57, 538, 573
  • Tellurantimony - 721, 896, 459, 288, 603, 672, 285, 478
  • Tellurite - 416, 721, 408, 124, 634, 640
  • Tellurium - 416, 546, 721, 10, 208, 408, 661, 671, 890, 147, 265, 304, 517, 673, 870, 640
  • Tennantite - 104, 295, 928, 377
  • Tetradymite - 104, 721, 661, 459, 8, 110, 147, 725, 738, 273
  • Tetrahedrite - 563, 104, 121, 176, 240, 272, 306, 582, 632
  • Thorogummite - 83
  • 'Titaniferous Magnetite' - 120
  • Titanite - 334, 753
  • Torbernite - 157, 230, 315, 431, 561, 880, 438
  • Törnebohmite-(Ce) - 690, 252
  • Tungstite - 531
  • Ulvöspinel - 334
  • Uraninite - 121, 83, 690, 49, 112, 230, 245, 561, 641, 880, 252
  • Uranophane - 698
  • 'Uranothorite' - 83
  • Vesuvianite - 12
  • Villiaumite - 638
  • Violarite - 169
  • Vivianite - 194
  • 'Wad' - 440
  • Weberite - 386
  • Weissite - 89, 151, 340, 640
  • Wolframite - 891, 757, 318
  • Wollastonite - 12
  • Woodhouseite - 97
  • 'Zeolite Group' - 334
  • Zircon - 382


  • 229 minerals listed.

    Locality Key
    11903, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    24th of July Occurrence, Arapahoe Peak, Boulder Co., Colorado, USA
    3Afterthought, Jamestown District, Boulder Co., Colorado, USA
    4Alahambra, Nederland District, Boulder Co., Colorado, USA
    5Alamakee, Gold Hill District, Boulder Co., Colorado, USA
    6Alaska Group, Gold Hill District, Boulder Co., Colorado, USA
    7Alaska Tunnel, Ward District, Boulder Co., Colorado, USA
    8Albion; Comanche; Maine; Washington; Penobscot; Monarch Occurrence, Lake Albion, Boulder Co., Colorado, USA
    9Alcyone, Ward District, Boulder Co., Colorado, USA
    10Alice Mine, Jamestown, Jamestown District, Boulder Co., Colorado, USA
    11All American; Durias; Gray Copper Occurrence, Jamestown District, Boulder Co., Colorado, USA
    12Allens Park, Boulder Co., Colorado, USA
    13Allied Gold Mining Company, Nederland District, Boulder Co., Colorado, USA
    14Alpine Horn, Sugarloaf District, Boulder Co., Colorado, USA
    15Alton Tunnel Occurrence (Pine Grove), Nederland District, Boulder Co., Colorado, USA
    16Alturas, Ward District, Boulder Co., Colorado, USA
    17Alum Hill, Boulder Co., Colorado, USA
    18Amalban Thief, Sugarloaf District, Boulder Co., Colorado, USA
    19American Eagle - Interocean Occurrence, Magnolia District, Boulder Co., Colorado, USA
    20American, Gold Hill District, Boulder Co., Colorado, USA
    21Amy Paul, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    22Amzy; Great Sphinx Occurrence, Gold Hill District, Boulder Co., Colorado, USA
    23Anchor, Nederland District, Boulder Co., Colorado, USA
    24Andesite Rock Quarry, Gold Hill District, Boulder Co., Colorado, USA
    25Anna C. Mine (Vacant Spot; Minnie Foy; Lone Pine; Beddig; Oregon; Niagara; Denver; Illinois; Greyback; Sunset Sisson; Spiderleg; Conger; Quay), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    26Arapahoe Group of Claims, Gold Hill District, Boulder Co., Colorado, USA
    27Archer, Gold Hill District, Boulder Co., Colorado, USA
    28Argo Mine, Jamestown District, Boulder Co., Colorado, USA
    29Arrow 1; 2; 3 Occurrence, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    30Arrowhead, Gold Hill District, Boulder Co., Colorado, USA
    31Atchison Mine (Atchison and Eldorado), Gold Hill District, Boulder Co., Colorado, USA
    32Atlanta, Gold Hill District, Boulder Co., Colorado, USA
    33Atlantic (Milwaukee; Emma Daniels; Pennsylvania Group; Black Diamond Occurrence), Gold Hill District, Boulder Co., Colorado, USA
    34Audophone, Nederland District, Boulder Co., Colorado, USA
    35Avalon Placer (Onondaga; Syracuse; Silver Str.), Boulder Co., Colorado, USA
    36Aztec, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    37B & M Occurrence, Ward District, Boulder Co., Colorado, USA
    38Badger, Jamestown District, Boulder Co., Colorado, USA
    39Bananza, Jamestown District, Boulder Co., Colorado, USA
    40Barker (Barker Tunnel), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    41Barker No. 3, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    42Barron, Boulder Co., Colorado, USA
    43Bat Claim No. 1 (Corona Mine), Gold Hill District, Boulder Co., Colorado, USA
    44Baxter (Boston; Columbia; Madelaine; Niwot; Sullivan No. 5; Utica Occurrence), Ward District, Boulder Co., Colorado, USA
    45Beaver, Boulder Co., Colorado, USA
    46Beggar, Magnolia District, Boulder Co., Colorado, USA
    47Belcher Mine, Caribou District, Boulder Co., Colorado, USA
    48Bell Group, Gold Hill District, Boulder Co., Colorado, USA
    49Belle of Memphis (Blackhawk; Horseshoe; Victoria; Mountain Chief; Fairfax; Olympic; Bighorn; Silver Queen; Scotia; Gowanda), Gold Hill District, Boulder Co., Colorado, USA
    50Bellvue (Belview), Gold Hill District, Boulder Co., Colorado, USA
    51Belmont (Graphic; Holy Cross; Tungsten King Occurrence), Magnolia District, Boulder Co., Colorado, USA
    52Ben C. Lowell, Nederland District, Boulder Co., Colorado, USA
    53Bertha Occurrence, Ward District, Boulder Co., Colorado, USA
    54Beryl claims, Boulder Co., Colorado, USA
    55Beryl lode, Boulder Co., Colorado, USA
    56Beryl Lode, Left Hand Creek District, Boulder Co., Colorado, USA
    57Beryl No. 1 Prospect, Ward District, Boulder Co., Colorado, USA
    58Beryl No. 2 Prospect, Ward District, Boulder Co., Colorado, USA
    59Big Bore Occurrence (L. R. Evans; Silver Ledge; Invincible; Buchannan; Terry; George Walker; Mark T. and Atkinson; Warren), Jamestown District, Boulder Co., Colorado, USA
    60Big Cameron, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    61Big Five (Black Jack Occurrence), Gold Hill District, Boulder Co., Colorado, USA
    62Big Horn Shaft (Caribou), Sugarloaf District, Boulder Co., Colorado, USA
    63Big John Mine, Sugarloaf District, Boulder Co., Colorado, USA
    64Big Six, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    65Bigthing Buckhorn, Jamestown District, Boulder Co., Colorado, USA
    66Birds Nest and Village Belle, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    67Bismark, Sugarloaf District, Boulder Co., Colorado, USA
    68Black Ace Claims, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    69Black Bear, Nederland District, Boulder Co., Colorado, USA
    70Black Cloud, Gold Hill District, Boulder Co., Colorado, USA
    71Black Hawk No. 2 vein, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    72Black Hope No. One, Jamestown District, Boulder Co., Colorado, USA
    73Black Iron Occurrence (Mammoth; Sunday; Mary Nelson; March; Tungsten; Elsie and Windy Tunnel; Tungsten Mtn. Nos. 6 & 9; Fitzsimmons No. 1), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    74Black Jack Mine, Ward District, Boulder Co., Colorado, USA
    75Black Jack, Jamestown District, Boulder Co., Colorado, USA
    76Black King, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    77Black Rose (12; 13; Rocky Mountain; Rogers No. 2; Blue Bell; Crackerjack; Black Squirrel), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    78Black Rose mine, Jamestown District, Boulder Co., Colorado, USA
    79Black Rover, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    80Blue Bird Mine, Grand Island Area, Boulder Co., Colorado, USA
    81Blue Coat Mine, Ward District, Boulder Co., Colorado, USA
    82Blue Eagle Occurrence, Gold Hill District, Boulder Co., Colorado, USA
    83Blue Jay Mine, Jamestown, Jamestown District, Boulder Co., Colorado, USA
    84Blue Ribbon, Boulder Co., Colorado, USA
    85Blue Stone Mines Inc., Jenny Creek, Boulder Co., Colorado, USA
    86Bluebird Mine, Nederland District, Boulder Co., Colorado, USA
    87Bobcat Occurrence (Mud Lake; Greenhorn; Philip Extension; Richard; Lone Tree; Crow; Nabob; Rake off; Corkscrew), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    88Bonanza No. 2, Boulder Co., Colorado, USA
    89Bondholder, Ward District, Boulder Co., Colorado, USA
    90Boodle, Nederland District, Boulder Co., Colorado, USA
    91Boston, Ward District, Boulder Co., Colorado, USA
    92Boulder area, Front Range, Boulder Co., Colorado, USA
    93Boulder Brick & Tile Company, Boulder Co., Colorado, USA
    94Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    95Boulder Co., Colorado, USA
    96Boulder County Mine, Caribou District, Boulder Co., Colorado, USA
    97Boulder Creek Granite, Boulder Co., Colorado, USA
    98Boulder Mine, Sugarloaf District, Boulder Co., Colorado, USA
    99Brace (Brace Tunnel), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    100Bradshaw, Jamestown District, Boulder Co., Colorado, USA
    101Brodies Saint Vrain, Gold Hill District, Boulder Co., Colorado, USA
    102Brooks (Broome Company; Olympic; Nebraska; Beatrice; Crater Occurrence), Arapahoe Peak, Boulder Co., Colorado, USA
    103Brown Spar (Browns Spar; Brownspar), Jamestown District, Boulder Co., Colorado, USA
    104Buckhorn Mine (Bigthing), Jamestown, Jamestown District, Boulder Co., Colorado, USA
    105Buckingham (Hathaway Placers), Jamestown District, Boulder Co., Colorado, USA
    106Buckskin Joe No. 1, Boulder Co., Colorado, USA
    107Buena mine, Jamestown District, Boulder Co., Colorado, USA
    108Buena Ventura, Ward District, Boulder Co., Colorado, USA
    109Buena Vista Mine Nos. 1-2-3, Jamestown District, Boulder Co., Colorado, USA
    110Bueno (Buena Group), Jamestown District, Boulder Co., Colorado, USA
    111Bummers Creek Placers, Boulder Co., Colorado, USA
    112Burlington Mine, Jamestown District, Boulder Co., Colorado, USA
    113Butch, Sugarloaf District, Boulder Co., Colorado, USA
    114Button R Dam, Boulder Co., Colorado, USA
    115Cabin Occurrence (Matchless No. 1 & 2; Blue Jay; Minnie), Sugarloaf District, Boulder Co., Colorado, USA
    116Cal-Wood Mica Mine, Jamestown District, Boulder Co., Colorado, USA
    117California, Nederland District, Boulder Co., Colorado, USA
    118Carfield, Boulder Co., Colorado, USA
    119Caribou District, Boulder Co., Colorado, USA
    120Caribou Hill Deposits, Caribou District, Boulder Co., Colorado, USA
    121Caribou Mine (Caribou shaft), Grand Island, Caribou District, Boulder Co., Colorado, USA
    122Carl Gardner, Ward District, Boulder Co., Colorado, USA
    123Carol Gore, Gold Hill District, Boulder Co., Colorado, USA
    124Cash Mine, Gold Hill, Gold Hill District, Boulder Co., Colorado, USA
    125Cashier, Jamestown District, Boulder Co., Colorado, USA
    126Castle Gulch, Jamestown District, Boulder Co., Colorado, USA
    127Catastrophe, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    128Catham Lode Occurrence, Ward District, Boulder Co., Colorado, USA
    129Celestial (Celestial Extension; Morning Star Occurrence), Ward District, Boulder Co., Colorado, USA
    130Centennial Tunnel Occurrence (Gov. Routt; Continental; Bismark; Bluebell Shaft & Tunnel; Canton; Mammoth; Scandia), Gold Hill District, Boulder Co., Colorado, USA
    131Central Gulch Placers, Gold Hill District, Boulder Co., Colorado, USA
    132Central Mining District, Boulder Co., Colorado, USA
    133Chancellor (Allied Jamestown), Jamestown District, Boulder Co., Colorado, USA
    134Chavez Mine, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    135Cheyenne (Modoc; Tiger Nos. 1 & 2 Occurrence), Magnolia District, Boulder Co., Colorado, USA
    136Chingis Kahn, Boulder Co., Colorado, USA
    137Chivington Lode Occurrence, Gold Hill District, Boulder Co., Colorado, USA
    138Churchs Pit, Boulder Co., Colorado, USA
    139Clara May, Nederland District, Boulder Co., Colorado, USA
    140Clara, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    141Clark Tunnel, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    142Clemens, Jamestown District, Boulder Co., Colorado, USA
    143Cleveland, Ward District, Boulder Co., Colorado, USA
    144Clyde Mine (Lily Mine; Gale Mine; Hoosier; Western Star), Nederland District, Boulder Co., Colorado, USA
    145Cobalt - Gold Mining Company (Emily; Francis B.; Acme Occurrence), Gold Hill District, Boulder Co., Colorado, USA
    146Col. Dick Occurrence (Yellow Aster; Puzzler; Northwestern; Leviathan Group; Alaska; Four Tree; Palladium), Gold Hill District, Boulder Co., Colorado, USA
    147Cold Spring and Red Cloud, Gold Hill District, Boulder Co., Colorado, USA
    148Cold Spring Mine, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    149Cold Spring No. 1, Boulder Co., Colorado, USA
    150Cold Spring Nos. 2 & 4 Occurrence, Nederland District, Boulder Co., Colorado, USA
    151Cold Springs Group (Times Tunnel; Hoodoo; Horsefal; Haddock; Crown; King; Wolf Tongue; Red Cloud), Gold Hill District, Boulder Co., Colorado, USA
    152Colorado Brick, Boulder Co., Colorado, USA
    153Colorado Miracle, Boulder Co., Colorado, USA
    154Colorado Springs Tungsten Placer, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    155Colorado, Gold Hill District, Boulder Co., Colorado, USA
    156Columbia & Spencer Mines, Caribou District, Boulder Co., Colorado, USA
    157Columbine Mine (New Girl; Anderson), Boulder Co., Colorado, USA
    158Columbus, Gold Hill District, Boulder Co., Colorado, USA
    159Comstock and Pandora, Central Mining District, Boulder Co., Colorado, USA
    160Comstock Occurrence, Caribou District, Boulder Co., Colorado, USA
    161Conger Mine, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    162Congo Chief, Nederland District, Boulder Co., Colorado, USA
    163Consolation Mine, Jamestown District, Boulder Co., Colorado, USA
    164Consolidated Silver Caribou Mines, Grand Island, Caribou District, Boulder Co., Colorado, USA
    165Coon Trail Creek Placers, Boulder Co., Colorado, USA
    166Copeland Mines (Copeland Group of Mines), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    167Copper Glance, Sunset, Boulder Co., Colorado, USA
    168Copper King (Gold Drop Occurrence), Gold Hill District, Boulder Co., Colorado, USA
    169Copper King Mine (Yeager's Mine), Gold Hill, Gold Hill District, Boulder Co., Colorado, USA
    170Copper Rock Mine, Ward District, Boulder Co., Colorado, USA
    171Corning Tunnel (Cold Spring; Alamakee; St. Joe; Blackhawk; Cash Occurrence), Gold Hill District, Boulder Co., Colorado, USA
    172Corundum Occurrence (J. B. Johnson; Broome Company; Brooks; Olympic; Honolulu; 2nd Ext. W. of 4th of July; Yellow Jacket), Sugarloaf District, Boulder Co., Colorado, USA
    173Cougar (Greyback Occurrence), Nederland District, Boulder Co., Colorado, USA
    174Cracker Jack, Boulder Co., Colorado, USA
    175Crete, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    176Cross Mine, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    177Cross No. 4, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    178Cross Prospect (Cross No. 2; Holy Cross), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    179Cross Spider Mine, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    180Crow No. 36, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    181Crownpoint, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    182Crucible Steel, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    183Daisy Occurrence (St. Vrain Placer; Sunny View; Deacon Placer; West Columbia; Tionesta; Onawa; Timberline No. 3; Tempest No. 3), Ward District, Boulder Co., Colorado, USA
    184Dale Taylor Lease Loukon, Gold Hill District, Boulder Co., Colorado, USA
    185Dam Waters Group, Gold Hill District, Boulder Co., Colorado, USA
    186David Mine, Sugarloaf District, Boulder Co., Colorado, USA
    187David Owen, Ward District, Boulder Co., Colorado, USA
    188December, Jamestown District, Boulder Co., Colorado, USA
    189Degge Clark, Boulder Co., Colorado, USA
    190Delaware Group, Ward District, Boulder Co., Colorado, USA
    191Denver City Occurrence (Contact; St. John; Skandia Group; Little Ida; Meadow Lark; Bald Mtn.; Old Hannah; Evening Star; New Prussian), Gold Hill District, Boulder Co., Colorado, USA
    192Denver Post Occurrence, Gold Hill District, Boulder Co., Colorado, USA
    193Des Moines, Jamestown District, Boulder Co., Colorado, USA
    194Devlin's Park Lake, Boulder Co., Colorado, USA
    195Dew Drop Occurrence, Sugarloaf District, Boulder Co., Colorado, USA
    196Dewey Rocky Mountain, Gold Hill District, Boulder Co., Colorado, USA
    197Diamond Group, Ward District, Boulder Co., Colorado, USA
    198Diamond K, Gold Hill District, Boulder Co., Colorado, USA
    199Diana, Jamestown District, Boulder Co., Colorado, USA
    200Dillon, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    201Dodge, Sugarloaf District, Boulder Co., Colorado, USA
    202Dolittle, Boulder Co., Colorado, USA
    203Dolly Varden Mine, Sunset, Boulder Co., Colorado, USA
    204Dorthy-Katie Mines, Sugarloaf District, Boulder Co., Colorado, USA
    205Doss, Sugarloaf District, Boulder Co., Colorado, USA
    206Doughty Placer (Rood Placer; Agricultural Land; Carbonate; Graham Placer), Sugarloaf District, Boulder Co., Colorado, USA
    207Dozer, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    208Dun Raven Mine, Magnolia District, Boulder Co., Colorado, USA
    209Durias, Jamestown District, Boulder Co., Colorado, USA
    210Dutch Park and Silver Point, Nederland District, Boulder Co., Colorado, USA
    211E. C. Hite Mine, Boulder Co., Colorado, USA
    212Eagle Rock Mine, Boulder Co., Colorado, USA
    213Earl, Jamestown District, Boulder Co., Colorado, USA
    214Early Spring, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    215East Boston, Boulder Co., Colorado, USA
    216Eastview Occurrence, Black River, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    217Eclipse, Caribou District, Boulder Co., Colorado, USA
    218Eldora Stock, Boulder Co., Colorado, USA
    219Eldora, Caribou District, Boulder Co., Colorado, USA
    220Eldorado Quarry, Ward District, Boulder Co., Colorado, USA
    221Eldorado Springs quadrangle, Boulder Co., Colorado, USA
    222Eldorado, Boulder Co., Colorado, USA
    223Electronic, Gold Hill District, Boulder Co., Colorado, USA
    224Elkhorn Prospect (Tin Horn Occurrence), Left Hand Creek District, Boulder Co., Colorado, USA
    225Ella C, Boulder Co., Colorado, USA
    226Ellen Mine, Boulder Co., Colorado, USA
    227Emely, Jamestown District, Boulder Co., Colorado, USA
    228Emerson, Gold Hill District, Boulder Co., Colorado, USA
    229Emilina Occurrence (Little Giant; Klondike; Connoton; Camera; Mountain Queen; Giles), Ward District, Boulder Co., Colorado, USA
    230Emmet, Jamestown District, Boulder Co., Colorado, USA
    231Empress (Sylvan Ute), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    232Empress Mine & Post Boy Tunnel, Sugarloaf District, Boulder Co., Colorado, USA
    233Energy Occurrence, Jamestown District, Boulder Co., Colorado, USA
    234Enterprise Vein Occurrence, Eldora, Caribou District, Boulder Co., Colorado, USA
    235Equator, Jamestown District, Boulder Co., Colorado, USA
    236Escanaba and Humbolt Occurrence, Gold Hill District, Boulder Co., Colorado, USA
    237Escanoba Mine, Jamestown District, Boulder Co., Colorado, USA
    238Eskimo, Nederland District, Boulder Co., Colorado, USA
    239Essco, Boulder Co., Colorado, USA
    240Eureka Mine (Eureka Alta), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    241Evans (Grant; Great Britain Occurrence), Gold Hill District, Boulder Co., Colorado, USA
    242Evening Star, Gold Hill District, Boulder Co., Colorado, USA
    243F. G. Watrous Tungsten Prospect, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    244Fair Count Vein Occurrence, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    245Fair Day Mine, Jamestown District, Boulder Co., Colorado, USA
    246Fair One, Sugarloaf District, Boulder Co., Colorado, USA
    247Fairday Mine, Central Mining District, Boulder Co., Colorado, USA
    248Fairfax, Gold Hill District, Boulder Co., Colorado, USA
    249Fairmount, Sugarloaf District, Boulder Co., Colorado, USA
    250Fallow Tunnel, Gold Hill District, Boulder Co., Colorado, USA
    251Farmer Boy, Jamestown District, Boulder Co., Colorado, USA
    252Fidelity Lode claim (Unnamed cerite deposits), Jamestown District, Boulder Co., Colorado, USA
    253First National Bank Occurrence, Gold Hill District, Boulder Co., Colorado, USA
    254Fisk, Gold Hill District, Boulder Co., Colorado, USA
    255Fitzgerald, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    256Fitzsimons No. One, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    257Five Brothers, Gold Hill District, Boulder Co., Colorado, USA
    258Flourspar, Jamestown District, Boulder Co., Colorado, USA
    259Floyd, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    260Fools Paradise Number 1 and 2, Gold Hill District, Boulder Co., Colorado, USA
    261Ford, Nederland District, Boulder Co., Colorado, USA
    262Forest Home Lode (Forest Home & Cold Spring), Nederland District, Boulder Co., Colorado, USA
    263Forest Mine, Gold Hill District, Boulder Co., Colorado, USA
    264Forlorn Hope Mine, Boulder Co., Colorado, USA
    265Fortune Occurrence, Magnolia District, Boulder Co., Colorado, USA
    266Fourmile Creek Placers, Boulder Co., Colorado, USA
    267Fourth of July, Jamestown District, Boulder Co., Colorado, USA
    268Fowler and Wells Ranch, Sugarloaf District, Boulder Co., Colorado, USA
    269Fox Hills Outcrop, Boulder-Weld Coal Field, Boulder Co., Colorado, USA
    270Fraction Lode (June; Lord Byron; Catastrophe; Evening Post Occurrence), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    271Franklin No. 5, Gold Hill District, Boulder Co., Colorado, USA
    272Free Coinage, Sunset, Boulder Co., Colorado, USA
    273Freiberg Mine, Gold Hill District, Boulder Co., Colorado, USA
    274G and S, Boulder Co., Colorado, USA
    275G. W. Horton Mill Site Occurrence (Church Placer; Clear Water Placer; Ravens View; Horseshoe Placer; Hubbard Placer), Sugarloaf District, Boulder Co., Colorado, USA
    276Gale Mine, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    277Gem, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    278George Henry, Gold Hill District, Boulder Co., Colorado, USA
    279Georgia A. Mine, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    280Gertrude (President; Mermaid No. 1 & 2; Keystone Placer; Greenback), Ward District, Boulder Co., Colorado, USA
    281Gibson Occurrence, Jamestown District, Boulder Co., Colorado, USA
    282Gilard, Boulder Co., Colorado, USA
    283Gillaspie and Big John, Gold Hill District, Boulder Co., Colorado, USA
    284Gina No. 1 and 2, Gold Hill District, Boulder Co., Colorado, USA
    285Glad Eye Mine, Sunshine, Boulder Co., Colorado, USA
    286Gladiator, Jamestown District, Boulder Co., Colorado, USA
    287Gladstone (Alice; McKinley Occurrence), Jamestown District, Boulder Co., Colorado, USA
    288Gladys (Temborine; Tamborine; Dime; Evening Star Dirigo Occurrence), Gold Hill District, Boulder Co., Colorado, USA
    289Glen Clover, Ward District, Boulder Co., Colorado, USA
    290Gold Coin, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    291Gold Cross, Jamestown District, Boulder Co., Colorado, USA
    292Gold Crystal Occurrence, Ward District, Boulder Co., Colorado, USA
    293Gold Farm, Nederland District, Boulder Co., Colorado, USA
    294Gold Hill Beryl Claims, Ward District, Boulder Co., Colorado, USA
    295Gold Hill District, Boulder Co., Colorado, USA
    296Gold Hill Occurrence (Rowena; Sunshine; Salina), Gold Hill District, Boulder Co., Colorado, USA
    297Gold Hill, Gold Hill District, Boulder Co., Colorado, USA
    298Gold King Occurrence, Caribou District, Boulder Co., Colorado, USA
    299Gold Lake & Manyon Occurrence, Ward District, Boulder Co., Colorado, USA
    300Gold Lake Property, Ward District, Boulder Co., Colorado, USA
    301Gold Lake Prospect (Diamond Claims; et al), Ward District, Boulder Co., Colorado, USA
    302Gold Ring (Gold Ring Tunnel), Ward District, Boulder Co., Colorado, USA
    303Gold Run Placers, Boulder Co., Colorado, USA
    304Golden Age, Jamestown District, Boulder Co., Colorado, USA
    305Golden Bell Occurrence (Providence; Forget Me Not; Chamois; Last Chance; John Jay & MS; Kicking Horse; Cross; Cleveland; Surprise; Yates), Gold Hill District, Boulder Co., Colorado, USA
    306Golden Chest (Canton; Culebra Occurrence), Sugarloaf District, Boulder Co., Colorado, USA
    307Golden Crown Group, Sugarloaf District, Boulder Co., Colorado, USA
    308Golden Eagle Occurrence, Sugarloaf District, Boulder Co., Colorado, USA
    309Golden Fox (Baltimore Belle; Ten Forty; Amazon; Glenwood Occurrence), Jamestown District, Boulder Co., Colorado, USA
    310Golden Glow, Magnolia District, Boulder Co., Colorado, USA
    311Golden Queen Occurrence, Ward District, Boulder Co., Colorado, USA
    312Golden Reward Occurrence, Grand Island, Caribou District, Boulder Co., Colorado, USA
    313Golden Slipper Occurrence (Bloomer; Parole; Protection; Johannesburg; Red Lion Occurrence), Gold Hill District, Boulder Co., Colorado, USA
    314Goldfinch, Jamestown District, Boulder Co., Colorado, USA
    315Goldsmith Maid Occurrence, Gold Hill District, Boulder Co., Colorado, USA
    316Good Friday Mine, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    317Good Hope, Gold Hill District, Boulder Co., Colorado, USA
    318Gordon Gulch, Nederland District, Boulder Co., Colorado, USA
    319Gordova, Jamestown District, Boulder Co., Colorado, USA
    320Governor Group, Ward District, Boulder Co., Colorado, USA
    321Grace, Gold Hill District, Boulder Co., Colorado, USA
    322Grand Central - Big Blossom, Jamestown District, Boulder Co., Colorado, USA
    323Grand Island Mine, Grand Island, Caribou District, Boulder Co., Colorado, USA
    324Grand Lodge Mine, Gold Hill District, Boulder Co., Colorado, USA
    325Grand Republic Occurrence, Gold Hill District, Boulder Co., Colorado, USA
    326Grand Union, Jamestown District, Boulder Co., Colorado, USA
    327Grand View, Gold Hill District, Boulder Co., Colorado, USA
    328Grant County, Nederland District, Boulder Co., Colorado, USA
    329Grant, Gold Hill District, Boulder Co., Colorado, USA
    330Gray Copper, Gold Hill District, Boulder Co., Colorado, USA
    331Great Britain, Gold Hill District, Boulder Co., Colorado, USA
    332Great Northern, Nederland District, Boulder Co., Colorado, USA
    333Great Western, Ward District, Boulder Co., Colorado, USA
    334Green Mountain kimberlite, Boulder Co., Colorado, USA
    335Green Spar, Jamestown District, Boulder Co., Colorado, USA
    336Greenback Occurrence, Ward District, Boulder Co., Colorado, USA
    337Greenhorn, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    338Grey Eagle Mine, Ward District, Boulder Co., Colorado, USA
    339Greyback, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    340Grouse, Ward District, Boulder Co., Colorado, USA
    341Hallie A Tungsten, Sugarloaf District, Boulder Co., Colorado, USA
    342Hammons, Gold Hill District, Boulder Co., Colorado, USA
    343Happy Thought, Nederland District, Boulder Co., Colorado, USA
    344Hawkeye, Gold Hill District, Boulder Co., Colorado, USA
    345Heil, Jamestown District, Boulder Co., Colorado, USA
    346Helen B, Ward District, Boulder Co., Colorado, USA
    347Helena, Ward District, Boulder Co., Colorado, USA
    348Henna, Gold Hill District, Boulder Co., Colorado, USA
    349Henry No. 1 & No. 2, Gold Hill District, Boulder Co., Colorado, USA
    350Herald Occurrence, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    351Hercules, Jamestown District, Boulder Co., Colorado, USA
    352Hereafter, Nederland District, Boulder Co., Colorado, USA
    353Herold, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    354Hershoc (Comstock; Holland & Roxburg Lodes Occurrence), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    355Hidden Treasure Occurrence (Horace Newman Placer; Ravens View; Four Mile; Churchplacer; Horton Mill Site; Horton Placer; Blue Wing; B S X X; German Prince), Sugarloaf District, Boulder Co., Colorado, USA
    356Hideaway No. 1, Sugarloaf District, Boulder Co., Colorado, USA
    357High Grade, Sugarloaf District, Boulder Co., Colorado, USA
    358High Line, Gold Hill District, Boulder Co., Colorado, USA
    359Highland Occurrence, Boulder Co., Colorado, USA
    360Highline Prospect, Left Hand Creek District, Boulder Co., Colorado, USA
    361Hildegarde (Oregon Occurrence), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    362Hill Gulch, Jamestown District, Boulder Co., Colorado, USA
    363Hillside, Sugarloaf District, Boulder Co., Colorado, USA
    364Holt (Sound Currency; Star Occurrence), Gold Hill District, Boulder Co., Colorado, USA
    365Home Run, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    366Homestake (Silent Friend; Cumberland; Morning Glory Occurrence), Gold Hill District, Boulder Co., Colorado, USA
    367Homestake, Nederland District, Boulder Co., Colorado, USA
    368Hoodoo, Gold Hill District, Boulder Co., Colorado, USA
    369Hoosier Extension, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    370Hoosier Mine, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    371Hopewell and Rusty, Jamestown District, Boulder Co., Colorado, USA
    372Horseshoe Comstock Holland Roxbury, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    373Horshoe Workings, Ward District, Boulder Co., Colorado, USA
    374Howe, Gold Hill District, Boulder Co., Colorado, USA
    375Hugo Mine, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    376Hugo Ranch (Hugo No. 2; Hugo Ranch Tungsten Property), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    377Humboldt Mine, Inexco Mine, Jamestown District, Boulder Co., Colorado, USA
    378Humbug, Magnolia District, Boulder Co., Colorado, USA
    379Hummer, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    380Hurricane, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    381Idaho Mine, Caribou District, Boulder Co., Colorado, USA
    382Idaho Springs Formation, Boulder Co., Colorado, USA
    383Ideal No. Two, Ward District, Boulder Co., Colorado, USA
    384Illinois (Quay), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    385India Mine, Magnolia District, Boulder Co., Colorado, USA
    386Inexco Mine, Jamestown District, Boulder Co., Colorado, USA
    387Ingersoll, Jamestown District, Boulder Co., Colorado, USA
    388Interocean Occurrence, Gold Hill District, Boulder Co., Colorado, USA
    389Invincible Occurrence, Jamestown District, Boulder Co., Colorado, USA
    390Irene, Sugarloaf District, Boulder Co., Colorado, USA
    391Iron Dyke, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    392Iron King Tunnel (Jule Lode Tunnel), Gold Hill District, Boulder Co., Colorado, USA
    393Isabel Mine, Caribou District, Boulder Co., Colorado, USA
    394J O Lode, Boulder Co., Colorado, USA
    395J. Albine, Sugarloaf District, Boulder Co., Colorado, USA
    396Jack and Summit, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    397Jackson, Boulder Co., Colorado, USA
    398Jacobson and Lyons, Gold Hill District, Boulder Co., Colorado, USA
    399Jake Witter, Gold Hill District, Boulder Co., Colorado, USA
    400James Creek Placers, Boulder Co., Colorado, USA
    401Jamestown District, Boulder Co., Colorado, USA
    402Jamestown, Jamestown District, Boulder Co., Colorado, USA
    403Jap, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    404Jasper Tunnel Occurrence, Nederland District, Boulder Co., Colorado, USA
    405Jay Bird, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    406Jenkins Pit, Boulder Co., Colorado, USA
    407Jimtown Mining Company, Jamestown District, Boulder Co., Colorado, USA
    408John Jay Mine, Magnolia District, Boulder Co., Colorado, USA
    409John W. Fittslease Brodie, Sugarloaf District, Boulder Co., Colorado, USA
    410Johnson, Gold Hill District, Boulder Co., Colorado, USA
    411Jumbo, Jamestown District, Boulder Co., Colorado, USA
    412Junior Shaft, Nederland District, Boulder Co., Colorado, USA
    413Kansas City Tunnel, Magnolia District, Boulder Co., Colorado, USA
    414Katie - Dorothy Mines, Sugarloaf District, Boulder Co., Colorado, USA
    415Kekionga Mine, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    416Keystone Mine, Magnolia District, Boulder Co., Colorado, USA
    417Keystone Placer (Evergreen; London; London Mill Site; London Extension), Ward District, Boulder Co., Colorado, USA
    418Kicker, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    419King Mountain, Gold Hill District, Boulder Co., Colorado, USA
    420King Occurrence (Dana; Gold Lode; Gillard; Doss; Lucky Star; Sakhart; Morning Glory), Gold Hill District, Boulder Co., Colorado, USA
    421King Tunnel Occurrence, Gold Hill District, Boulder Co., Colorado, USA
    422King Wilhelm mine, Jamestown District, Boulder Co., Colorado, USA
    423Kingston Mine, Boulder Co., Colorado, USA
    424Kirts, Gold Hill District, Boulder Co., Colorado, USA
    425Kline, Gold Hill District, Boulder Co., Colorado, USA
    426Klondike (Klondike No. 1; Klondike Mine; Klondyke), Ward District, Boulder Co., Colorado, USA
    427Koh-I-Noor Tunnel Occurrence, Eldora, Caribou District, Boulder Co., Colorado, USA
    428Krakajak Number 1 lode, Sugarloaf District, Boulder Co., Colorado, USA
    429Krakajak Number 2 lode, Sugarloaf District, Boulder Co., Colorado, USA
    430L. Evans Lease Occurrence, Jamestown District, Boulder Co., Colorado, USA
    431Lady Bug Occurrence, Jamestown District, Boulder Co., Colorado, USA
    432Lady Franklin Mine, Magnolia District, Boulder Co., Colorado, USA
    433Lady Luck Occurrence (Protection; Bluebird; Exchange; Hillside; Columbine; Miser's Tunnel; Little Jack; Little Major; Rudy No. 2; Long Tunnel; Iowa), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    434Lake Albion, Boulder Co., Colorado, USA
    435Lake, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    436Lands End, Gold Hill District, Boulder Co., Colorado, USA
    437Las Animas Mine, Sugarloaf District, Boulder Co., Colorado, USA
    438LaSalle Mine area, Jamestown District, Boulder Co., Colorado, USA
    439Last Chance (Gray Copper Emerson; Concord; Forest; Franklin Occurrence), Gold Hill District, Boulder Co., Colorado, USA
    440Last Chance (Nancy Henderson; Forest Home; Cold Spring Veins Occurrence), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    441Last Chance Occurrence (Last Chance No. 1), Sugarloaf District, Boulder Co., Colorado, USA
    442Last Chance Occurrence (Pine Shade), Jamestown District, Boulder Co., Colorado, USA
    443Last Chance Shaft (Midnight Tunnel Sulphide; Plymouth Rock; Last Chance Tunnel), Ward District, Boulder Co., Colorado, USA
    444Lawrence, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    445Lease Tailings Pond (Stattendale Dump), Boulder Area, Boulder Co., Colorado, USA
    446Left Hand Creek District, Boulder Co., Colorado, USA
    447Lefthand Creek Placer, Boulder Co., Colorado, USA
    448Lehman Lode Occurrence, Jamestown District, Boulder Co., Colorado, USA
    449Leo the Lion Lode No. 1, Jamestown District, Boulder Co., Colorado, USA
    450Leoch Occurrence (Big John; Dolly; Worlds Fair; Gillespie; United Empire Mines Group; American; Missing Link; Hawkeye), Gold Hill District, Boulder Co., Colorado, USA
    451Leonidas (Olympia; Maymil A.; Park Placer), Sugarloaf District, Boulder Co., Colorado, USA
    452Lewis Lode (Lewis No. 1 & 2; Lewis Slope), Jamestown District, Boulder Co., Colorado, USA
    453Lily (Lily of The West), Jamestown District, Boulder Co., Colorado, USA
    454Lily, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    455Little Alice, Ward District, Boulder Co., Colorado, USA
    456Little Belle & W. Extension Occurrence, Sugarloaf District, Boulder Co., Colorado, USA
    457Little Bessie (Lee Placer; Buckingham Placer), Jamestown District, Boulder Co., Colorado, USA
    458Little Bonnie Mine, Boulder Co., Colorado, USA
    459Little Johnny mine (Emancipation Group; Home Sweet Home Occurrence), Gold Hill, Gold Hill District, Boulder Co., Colorado, USA
    460Little Maud, Magnolia District, Boulder Co., Colorado, USA
    461Little More, Jamestown District, Boulder Co., Colorado, USA
    462Little Pittsburg, Nederland District, Boulder Co., Colorado, USA
    463Little Princess, Gold Hill District, Boulder Co., Colorado, USA
    464Little Ruby, Gold Hill District, Boulder Co., Colorado, USA
    465Livingston Group, Sugarloaf District, Boulder Co., Colorado, USA
    466Logan & Sunbeam Occurrence, Gold Hill District, Boulder Co., Colorado, USA
    467Long Gulch, Wallstreet, Boulder Co., Colorado, USA
    468Long Shot, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    469Longfellow, Jamestown District, Boulder Co., Colorado, USA
    470Longmont Brick & Tile Company, Boulder Co., Colorado, USA
    471Lookout Occurrence (Pleasant Dream Annie L.; Balmoral; April Fool; Smith; Little Lester; Parker; Luckie No. 2; March Wind-Red Bird), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    472Lord Byron, Magnolia District, Boulder Co., Colorado, USA
    473Lost Boy (Lost Boy Lode), Gold Hill District, Boulder Co., Colorado, USA
    474Lost Dutchman, Ward District, Boulder Co., Colorado, USA
    475Lost Lake Lode Occurrence, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    476Lost Turn (Lafayette Occurrence), Jamestown District, Boulder Co., Colorado, USA
    477Loukonen Brothers Silica Mine, Gold Hill District, Boulder Co., Colorado, USA
    478Lucile Mine, Sunshine, Boulder Co., Colorado, USA
    479Luckie 2 (Luckie 2 Tungsten; Luckie 3; Smith), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    480Lucky Lady, Sugarloaf District, Boulder Co., Colorado, USA
    481Lucky Lode Occurrence, Jamestown District, Boulder Co., Colorado, USA
    482Lucky Star, Gold Hill District, Boulder Co., Colorado, USA
    483Lucky Strike (Last Nickel), Dry Lake, Boulder Co., Colorado, USA
    484Lucky Two, Boulder Co., Colorado, USA
    485Lugar Occurrence, Sugarloaf District, Boulder Co., Colorado, USA
    486Lulu B. & Victory Claims (Gold Leaf Lode; Victory Group), Jamestown District, Boulder Co., Colorado, USA
    487Ma W, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    488Mack, Gold Hill District, Boulder Co., Colorado, USA
    489Mackenzie, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    490Macky, Gold Hill District, Boulder Co., Colorado, USA
    491Madredoro, Ward District, Boulder Co., Colorado, USA
    492Magner, Caribou District, Boulder Co., Colorado, USA
    493Magnolia District, Boulder Co., Colorado, USA
    494Magnolia Vein, Kekionga Mine, Magnolia District, Boulder Co., Colorado, USA
    495Magnolia, Nederland District, Boulder Co., Colorado, USA
    496Majestic, Jamestown District, Boulder Co., Colorado, USA
    497Mammoth, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    498Manchester, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    499Manyon, Ward District, Boulder Co., Colorado, USA
    500Marc. No. 1 Occurrence, Jamestown District, Boulder Co., Colorado, USA
    501Marion Mill, Sugarloaf District, Boulder Co., Colorado, USA
    502Marshal (Langford Surface Iron), Boulder Co., Colorado, USA
    503Marshall Clay Pit, Boulder Co., Colorado, USA
    504Marshall, Boulder Co., Colorado, USA
    505Martin Marietta Limestone Quarry, Boulder Co., Colorado, USA
    506Mary V, Nederland District, Boulder Co., Colorado, USA
    507Maude S, Jamestown District, Boulder Co., Colorado, USA
    508May Blossom (Eclipse M. S.; Eclipse; Sherry; Potosi; Maggie Occurrence), Nederland District, Boulder Co., Colorado, USA
    509May Blossom No. 2, Nederland District, Boulder Co., Colorado, USA
    510May Flower Occurrence (Golden Harp; Cumberland; Rocky Mtn. Mammoth; Maud S.; Anna Clara; Bull Domingo), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    511McCall Quarries (Landau), Gold Hill District, Boulder Co., Colorado, USA
    512McCann Clay Mine, Boulder Co., Colorado, USA
    513McConnel, Gold Hill District, Boulder Co., Colorado, USA
    514McKenzie Tunnel (Big Six; Charley; Lonesome Polecat; Townlot Occurrence), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    515McKnight Placer, Gold Hill District, Boulder Co., Colorado, USA
    516Melbourne Mine, Sugarloaf District, Boulder Co., Colorado, USA
    517Melvina, Gold Hill District, Boulder Co., Colorado, USA
    518Midway Tunnel, Eureka Tungsten Mining Company, Sugarloaf District, Boulder Co., Colorado, USA
    519Mikes Adit, Jamestown District, Boulder Co., Colorado, USA
    520Milan Mine, Sugarloaf District, Boulder Co., Colorado, USA
    521Mill Site, Overland Occurrence, Jamestown District, Boulder Co., Colorado, USA
    522Mill Sites, Santa Lasaria (Mtn. Mexico; Bravo Occurrence), Magnolia District, Boulder Co., Colorado, USA
    523Miller Group, Jamestown District, Boulder Co., Colorado, USA
    524Minnie and Ohio Occurrence, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    525Minnie Barrel Occurrence, Gold Hill District, Boulder Co., Colorado, USA
    526Minnie Foy Mine, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    527Miranda A. Johnson Occurrence, Jamestown District, Boulder Co., Colorado, USA
    528Misers Delight Mine, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    529Misers Dream, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    530Mishap (Princess Eulalia; Crackerjack; Crete; Gold Coin; Gold Leaf Occurrence), Sugarloaf District, Boulder Co., Colorado, USA
    531Missing Link Occurrence (Roderick; Cross No. 2; Rambler-Lower Rambler; Minnesota; Brace Tract; Tennessee; Blackhalk), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    532Missoula, Magnolia District, Boulder Co., Colorado, USA
    533Mock Shaft Occurrence (Big Six Mine), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    534Modoc, Ward District, Boulder Co., Colorado, USA
    535Mogul Tunnel Occurrence, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    536Mojave, Boulder Co., Colorado, USA
    537Molly Gibson, Magnolia District, Boulder Co., Colorado, USA
    538Mona No. 9 Claim, Crystal Mountain, Boulder Co., Colorado, USA
    539Monday Lode, Sugarloaf District, Boulder Co., Colorado, USA
    540Monitor Tunnel, Sugarloaf District, Boulder Co., Colorado, USA
    541Montezuma, Sugarloaf District, Boulder Co., Colorado, USA
    542Moon, Ward District, Boulder Co., Colorado, USA
    543More, Gold Hill District, Boulder Co., Colorado, USA
    544Morning Glory, Boulder Co., Colorado, USA
    545Mountain Goat, Caribou District, Boulder Co., Colorado, USA
    546Mountain Lion Mine - Keystone Vein, Magnolia District, Boulder Co., Colorado, USA
    547Mountain Plains, Gold Hill District, Boulder Co., Colorado, USA
    548Mountain Squaw, Ward District, Boulder Co., Colorado, USA
    549Mountain View (Orinoco Occurrence), Ward District, Boulder Co., Colorado, USA
    550Mt Pleasent, Jamestown District, Boulder Co., Colorado, USA
    551Myrtle Occurrence, Gold Hill District, Boulder Co., Colorado, USA
    552Mystery Group, Sugarloaf District, Boulder Co., Colorado, USA
    553N R A, Ward District, Boulder Co., Colorado, USA
    554N. G. Mitts Tungsten Prospect No. 1, Sugarloaf District, Boulder Co., Colorado, USA
    555N. G. Mitts Tungsten Prospect No. 2, Sugarloaf District, Boulder Co., Colorado, USA
    556Nancy Group, Boulder Co., Colorado, USA
    557Nancy Henderson, Last Chance (Nancy Henderson; Forest Home; Cold Spring Veins Occurrence), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    558Nancy Wood mine (Sugar Loaf; Forest; Pittsburg; Gray Copper), Gold Hill, Gold Hill District, Boulder Co., Colorado, USA
    559National No. 2, Sugarloaf District, Boulder Co., Colorado, USA
    560National Tungsten, Ward District, Boulder Co., Colorado, USA
    561Nations Treasure (Nations Treasure Tunnel), Jamestown District, Boulder Co., Colorado, USA
    562Native Silver Mine, Caribou District, Boulder Co., Colorado, USA
    563Nederland District, Boulder Co., Colorado, USA
    564Nederland, Nederland District, Boulder Co., Colorado, USA
    565Nederland, Sugarloaf District, Boulder Co., Colorado, USA
    566Nelson, Ward District, Boulder Co., Colorado, USA
    567Nettie, Ward District, Boulder Co., Colorado, USA
    568Nevco, Ward District, Boulder Co., Colorado, USA
    569New Brunswick, Ward District, Boulder Co., Colorado, USA
    570New California Occurrence (Baltimore; Gray Bird; Philadelphia; Nimbus; Gold Chief; Boston; Gold King; Village Bell; Baxter; High Line; Cross; U.P.; Cornicopia), Gold Hill District, Boulder Co., Colorado, USA
    571New Century Occurrence, Jamestown District, Boulder Co., Colorado, USA
    572New Discovery Occurrence, Ward District, Boulder Co., Colorado, USA
    573New Girl Prospect, Left Hand Creek District, Boulder Co., Colorado, USA
    574New Rival - Black Rose, Ward District, Boulder Co., Colorado, USA
    575New Year, Magnolia District, Boulder Co., Colorado, USA
    576New York (New York Union; Pilot Occurrence), Gold Hill District, Boulder Co., Colorado, USA
    577Ni-Wot, Sugarloaf District, Boulder Co., Colorado, USA
    578Niagra, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    579Night Shade, Sugarloaf District, Boulder Co., Colorado, USA
    580Nil Desperandum, Ward District, Boulder Co., Colorado, USA
    581Nil Sine Numine, Sugarloaf District, Boulder Co., Colorado, USA
    582No Name Mine (MRDS - 10108224), Caribou District, Boulder Co., Colorado, USA
    583No. 4, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    584Noland, Gold Hill District, Boulder Co., Colorado, USA
    585None (MRDS - 10263441), Ward District, Boulder Co., Colorado, USA
    586North Beaver Creek Placers, Boulder Co., Colorado, USA
    587North Soni Claim, Jamestown District, Boulder Co., Colorado, USA
    588North Sopi Occurrence, Jamestown District, Boulder Co., Colorado, USA
    589Northwestern (Stanislaus; Colorado; Simpson Placer), Jamestown District, Boulder Co., Colorado, USA
    590Norway, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    591Nugget Group, Jamestown District, Boulder Co., Colorado, USA
    592Nyanza, Sugarloaf District, Boulder Co., Colorado, USA
    593Occidental, Ward District, Boulder Co., Colorado, USA
    594Ogalla, Gold Hill District, Boulder Co., Colorado, USA
    595Ohio Tungsten Mine, Gold Hill District, Boulder Co., Colorado, USA
    596Ohline, Gold Hill District, Boulder Co., Colorado, USA
    597Oklahoma, Boulder Co., Colorado, USA
    598One and Three Quarters, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    599Oneonta, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    600Ophir, Nederland District, Boulder Co., Colorado, USA
    601Oregon Mine, Nederland, Nederland District, Boulder Co., Colorado, USA
    602Orion (Orion Tunnel; Orion & Saddle No. 6 Fluorspar Mine), Central Mining District, Boulder Co., Colorado, USA
    603Orofino, Jamestown District, Boulder Co., Colorado, USA
    604Orphan Boy Occurrence, Sunset, Boulder Co., Colorado, USA
    605Osceola, Gold Hill District, Boulder Co., Colorado, USA
    606Otego, Nederland District, Boulder Co., Colorado, USA
    607Overseer, Sugarloaf District, Boulder Co., Colorado, USA
    608Palladium (Architect; Starlight; Chrysolite Occurrence), Sugarloaf District, Boulder Co., Colorado, USA
    609Pandora No. 1 & 4 Lode Claims, Magnolia District, Boulder Co., Colorado, USA
    610Park Placer (Congo Chief; Apex; Dominion; American; Josie Mansfield Placer; Don; Rico; Deyling; Enterprise), Magnolia District, Boulder Co., Colorado, USA
    611Parker Prospect (Rowena), Gold Hill District, Boulder Co., Colorado, USA
    612Partridge Lode, Coal Creek, Boulder Co., Colorado, USA
    613Paymaster-Wheelman Tunnel Occurrence (Black Crystal; Black Prince; Mac Group; Pennsylvania), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    614Peacock, Gold Hill District, Boulder Co., Colorado, USA
    615Peewink, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    616Pennsylvania Lode Occurrence, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    617Pettie May, Ward District, Boulder Co., Colorado, USA
    618Pfiefer, Gold Hill District, Boulder Co., Colorado, USA
    619Philadelphia, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    620Phillip (Phillip Extension; Lone Tree; Rake Off), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    621Phillips (Meadow Lark; Lee S.; Sur No. 209; Storm Occurrence), Sugarloaf District, Boulder Co., Colorado, USA
    622Pickett, Jamestown District, Boulder Co., Colorado, USA
    623Pickwick, Magnolia District, Boulder Co., Colorado, USA
    624Piddler, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    625Pilot Mine, Gold Hill District, Boulder Co., Colorado, USA
    626Pine Shade Mine, Caribou District, Boulder Co., Colorado, USA
    627Pits One and Two, Boulder Co., Colorado, USA
    628Plain View, Gold Hill District, Boulder Co., Colorado, USA
    629Plough Boy, Gold Hill District, Boulder Co., Colorado, USA
    630Polar Star Occurrence (Moltke; Tarbox; Oklahoma; Brainard Tunnel; Bismark; Superior; Empire No. 3; Ward; Lulu B.), Gold Hill District, Boulder Co., Colorado, USA
    631Poop-Out Claims, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    632Poorman Group, Gold Hill District, Boulder Co., Colorado, USA
    633Poorman Hill, Gold Hill District, Boulder Co., Colorado, USA
    634Poorman Mine (1), Magnolia District, Boulder Co., Colorado, USA
    635Poorman Mine (2), Caribou District, Boulder Co., Colorado, USA
    636Poorman Occurrence, Jamestown District, Boulder Co., Colorado, USA
    637Poormans Relief (Poormans Shaft; Poormans Tunnel), Sugarloaf District, Boulder Co., Colorado, USA
    638Porphry Mountain, Jamestown District, Boulder Co., Colorado, USA
    639Post Boy, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    640Potato Patch Mine, Sugarloaf District, Boulder Co., Colorado, USA
    641Potosi & Cross Mines, Caribou District, Boulder Co., Colorado, USA
    642Poupout, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    643Power Shaft, Magnolia District, Boulder Co., Colorado, USA
    644Primos Mine, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    645Primp, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    646Princess Eulalia, Sugarloaf District, Boulder Co., Colorado, USA
    647Prussian, Ward District, Boulder Co., Colorado, USA
    648Pueblo Belle Occurrence, Sugarloaf District, Boulder Co., Colorado, USA
    649Puzzle, Boulder Co., Colorado, USA
    650Puzzler, Sugarloaf District, Boulder Co., Colorado, USA
    651Quaker City; Ophir; Pennsylvania; Peewink, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    652Queen Mine, Ward District, Boulder Co., Colorado, USA
    653Radium (Elmer; & Nelson Veins), Caribou District, Boulder Co., Colorado, USA
    654Rafter Lease, Sugarloaf District, Boulder Co., Colorado, USA
    655Rambler, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    656Ramey, Gold Hill District, Boulder Co., Colorado, USA
    657Range View Mine, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    658Rawley, Gold Hill District, Boulder Co., Colorado, USA
    659Ready Cash, Gold Hill District, Boulder Co., Colorado, USA
    660Recluse, Magnolia District, Boulder Co., Colorado, USA
    661Red Cloud Mine (Chicago; Colorado Occurrence), Gold Hill District, Boulder Co., Colorado, USA
    662Red Elephant, Boulder Co., Colorado, USA
    663Red Gold, Boulder Co., Colorado, USA
    664Red Hot Mine, Sunset, Boulder Co., Colorado, USA
    665Red Lode Claim, Boulder West, Boulder Co., Colorado, USA
    666Red Signe Mine, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    667Red Spruce Occurrence, Jamestown District, Boulder Co., Colorado, USA
    668Redstone, Gold Hill District, Boulder Co., Colorado, USA
    669Resumption Placer (Gold King; Copper Queen Nos. 2-9), Nederland District, Boulder Co., Colorado, USA
    670Revenge Occurrence, Caribou District, Boulder Co., Colorado, USA
    671Rex Mine, Gold Hill District, Boulder Co., Colorado, USA
    672Richard Occurrence (Minnie Bell; Washburn; White Eagle; Dolly; Plough Boy; Oceola; Gillaspie), Gold Hill District, Boulder Co., Colorado, USA
    673Richmond Mine, Gold Hill District, Boulder Co., Colorado, USA
    674Ridge, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    675Rio Tinto, Jamestown District, Boulder Co., Colorado, USA
    676Rip Van Dam, Jamestown District, Boulder Co., Colorado, USA
    677Rocky Flats and Plainview, Boulder Co., Colorado, USA
    678Rocky Mountain Gold Mines, Nederland District, Boulder Co., Colorado, USA
    679Roger Patent, Nederland District, Boulder Co., Colorado, USA
    680Rogers No. 1; 2; 3-5; 7-11 Occurrence, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    681Roose Tunnel Occurrence, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    682Roosevelt Lease, Sugarloaf District, Boulder Co., Colorado, USA
    683Rose Mary Occurrence, Gold Hill District, Boulder Co., Colorado, USA
    684Rose, Ward District, Boulder Co., Colorado, USA
    685Roslyn, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    686Rough Rider (Monument; Gold Lode; Zuma; Lincoln Occurrence), Gold Hill District, Boulder Co., Colorado, USA
    687Ruby Occurrence, Ward District, Boulder Co., Colorado, USA
    688Ruski Quarry, Gold Hill District, Boulder Co., Colorado, USA
    689Rusty Dime, Magnolia District, Boulder Co., Colorado, USA
    690Rusty Gold Mine (Copper Blush Occurrence), Jamestown District, Boulder Co., Colorado, USA
    691Sac and Fox, Magnolia District, Boulder Co., Colorado, USA
    692Saklrat, Gold Hill District, Boulder Co., Colorado, USA
    693Sancho Occurrence, Jamestown District, Boulder Co., Colorado, USA
    694Santa La Saria, Nederland District, Boulder Co., Colorado, USA
    695Scandia Vein Occurrence, Nederland District, Boulder Co., Colorado, USA
    696Schoolhouse limburgite porphry, Sugarloaf District, Boulder Co., Colorado, USA
    697Senator Hill and Ophir Veins, Magnolia District, Boulder Co., Colorado, USA
    698Seneca Mines Diamond Claims, Central Mining District, Boulder Co., Colorado, USA
    699Sentinel, Jamestown District, Boulder Co., Colorado, USA
    700Seven-Thirty Mine, Caribou District, Boulder Co., Colorado, USA
    701Sherman, Caribou District, Boulder Co., Colorado, USA
    702Shields, Sugarloaf District, Boulder Co., Colorado, USA
    703Shirley Lode, Grand Island, Caribou District, Boulder Co., Colorado, USA
    704Silent Friend, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    705Silica Quarry (MRDS - 10117165), Gold Hill District, Boulder Co., Colorado, USA
    706Silver Dollar, Caribou District, Boulder Co., Colorado, USA
    707Silver Harp, Gold Hill District, Boulder Co., Colorado, USA
    708Silver King, Nederland District, Boulder Co., Colorado, USA
    709Silver Lake Dam, Nederland District, Boulder Co., Colorado, USA
    710Silver Lode, Gold Hill District, Boulder Co., Colorado, USA
    711Silver Point Mine, Caribou District, Boulder Co., Colorado, USA
    712Silver Queen, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    713Simon, Sugarloaf District, Boulder Co., Colorado, USA
    714Sisk Mine, Gold Hill District, Boulder Co., Colorado, USA
    715Sister Emma, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    716Skunk Tunnel, Jamestown District, Boulder Co., Colorado, USA
    717Slide Mine, Gold Hill District, Boulder Co., Colorado, USA
    718Smokey Hill Mine, Gold Hill District, Boulder Co., Colorado, USA
    719Smoky Gold United, Ward District, Boulder Co., Colorado, USA
    720Smoky Hill Mine, Sugarloaf District, Boulder Co., Colorado, USA
    721Smuggler Mine, Balarat District, Boulder Co., Colorado, USA
    722Smuggler Occurrence, Jamestown District, Boulder Co., Colorado, USA
    723Snow Flake, Magnolia District, Boulder Co., Colorado, USA
    724Snowbound Mine, Ward District, Boulder Co., Colorado, USA
    725Snowy Range Mine, Lake Albion, Boulder Co., Colorado, USA
    726South Boulder Creek Placers, Boulder Co., Colorado, USA
    727Sparkling Jewel Vein Occurrence (Chapman Mine), Sugarloaf District, Boulder Co., Colorado, USA
    728Spartan No. 5, Jamestown District, Boulder Co., Colorado, USA
    729Spider Leg, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    730Spring Bear, Nederland District, Boulder Co., Colorado, USA
    731Spruce Gulch Occurrence, Jamestown District, Boulder Co., Colorado, USA
    732St Elmo, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    733St James, Gold Hill District, Boulder Co., Colorado, USA
    734St Louis, Ward District, Boulder Co., Colorado, USA
    735St. Joe Mine, Gold Hill District, Boulder Co., Colorado, USA
    736St. Louis Mine, Grand Island Area, Boulder Co., Colorado, USA
    737Standard Mine, Boulder Co., Colorado, USA
    738Stanley Vein, Jamestown District, Boulder Co., Colorado, USA
    739Staughton, Ward District, Boulder Co., Colorado, USA
    740Steamboat Valley, Gold Hill District, Boulder Co., Colorado, USA
    741Steele Plate Tungsten, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    742Stevens Camp Tunnels, Nederland District, Boulder Co., Colorado, USA
    743Stump Occurrence, Boulder Co., Colorado, USA
    744Success No. 1 Occurrence, Sugarloaf District, Boulder Co., Colorado, USA
    745Sugarloaf District, Boulder Co., Colorado, USA
    746Summers, Gold Hill District, Boulder Co., Colorado, USA
    747Summit Shaft, Gold Hill District, Boulder Co., Colorado, USA
    748Sun and Moon Mine (Desperandum Mine), Ward District, Boulder Co., Colorado, USA
    749Sunday Tungsten (Chance), Jamestown District, Boulder Co., Colorado, USA
    750Sunday Vein Occurrence, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    751Sunnyside, Sugarloaf District, Boulder Co., Colorado, USA
    752Sunrise (Yellow Jacket; Don D.; Shelton; McDermit Occurrence), Gold Hill District, Boulder Co., Colorado, USA
    753Sunset, Boulder Co., Colorado, USA
    754Sunshine Canyon deposit, Boulder Co., Colorado, USA
    755Sunshine Clay Mines, Boulder Co., Colorado, USA
    756Sunshine Group, Gold Hill District, Boulder Co., Colorado, USA
    757Sunshine, Boulder Co., Colorado, USA
    758Sureshot, Ward District, Boulder Co., Colorado, USA
    759Sussex, Boulder Co., Colorado, USA
    760Sylvanite Tunnel, Magnolia District, Boulder Co., Colorado, USA
    761Tammany, Gold Hill District, Boulder Co., Colorado, USA
    762Tanner, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    763Tarbox Tunnel, Ward District, Boulder Co., Colorado, USA
    764Telephone, Nederland District, Boulder Co., Colorado, USA
    765Ten, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    766Tenderfoot, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    767Tennessee (American; White Crow; Golden Harp Occurrence), Gold Hill District, Boulder Co., Colorado, USA
    768Terror - Roseberry Occurrence, Caribou District, Boulder Co., Colorado, USA
    769Terror, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    770Three Brothers, Gold Hill District, Boulder Co., Colorado, USA
    771Three Occurrence, Ward District, Boulder Co., Colorado, USA
    772Thunderbolt-Roman Eagle, Ward District, Boulder Co., Colorado, USA
    773Tillie Botzel, Ward District, Boulder Co., Colorado, USA
    774Times, Gold Hill District, Boulder Co., Colorado, USA
    775Tip Top, Nederland District, Boulder Co., Colorado, USA
    776Tippecanoe, Ward District, Boulder Co., Colorado, USA
    777Tom Lyle Group, Gold Hill District, Boulder Co., Colorado, USA
    778Tornado, Sugarloaf District, Boulder Co., Colorado, USA
    779Town Lot, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    780Trail & Diamond Claims, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    781Tri State, Boulder Co., Colorado, USA
    782Trombo, Gold Hill District, Boulder Co., Colorado, USA
    783True Blue Occurrence (Pioneer Placer; Lafayette; Tony Placer; Consolidated Placer; Lee Placer), Jamestown District, Boulder Co., Colorado, USA
    784Tungsten Group (Tungsten Claims), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    785Tungsten King, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    786Tungsten Lode Mine, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    787Tungsten Lode, Sugarloaf District, Boulder Co., Colorado, USA
    788Turnpike, Boulder Co., Colorado, USA
    789Twin Brothers, Boulder Co., Colorado, USA
    790Twin Sister, Boulder Co., Colorado, USA
    791Twin Vein, Ward District, Boulder Co., Colorado, USA
    792Union Pacific (U.P.), Ward District, Boulder Co., Colorado, USA
    793United Building Stone, Gold Hill District, Boulder Co., Colorado, USA
    794United Empire, Gold Hill District, Boulder Co., Colorado, USA
    795United Mines, Boulder Co., Colorado, USA
    796University of Colorado Quarry, Gold Hill District, Boulder Co., Colorado, USA
    797Unknown Clay - Fire (Refractory; MRDS - 10108227), Boulder Co., Colorado, USA
    798Unknown Feldspar - Quartz Occurrence (MRDS - 10165727), Jamestown District, Boulder Co., Colorado, USA
    799Unknown Feldspar - Quartz Occurrence, Jamestown District, Boulder Co., Colorado, USA
    800Unknown Gold - Silver Occurrence (MRDS - 10017183), Caribou District, Boulder Co., Colorado, USA
    801Unknown Gold - Silver Occurrence (MRDS - 10017187), Caribou District, Boulder Co., Colorado, USA
    802Unknown Gold - Silver Occurrence (MRDS - 10017191), Nederland District, Boulder Co., Colorado, USA
    803Unknown Gold - Tungsten Occurrence (MRDS - 10091282), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    804Unknown Gold (MRDS - 10018199), Gold Hill District, Boulder Co., Colorado, USA
    805Unknown Gold (MRDS - 10108251), Sugarloaf District, Boulder Co., Colorado, USA
    806Unknown Gold Occurrence (MRDS - 10017004), Jamestown District, Boulder Co., Colorado, USA
    807Unknown Gold Occurrence (MRDS - 10017012), Boulder Co., Colorado, USA
    808Unknown Gold Occurrence (MRDS - 10017272), Nederland District, Boulder Co., Colorado, USA
    809Unknown Gold Occurrence (MRDS - 10017285), Nederland District, Boulder Co., Colorado, USA
    810Unknown Gold Occurrence (MRDS - 10017286), Boulder Co., Colorado, USA
    811Unknown Gold Occurrence (MRDS - 10017287), Boulder Co., Colorado, USA
    812Unknown Gold Occurrence (MRDS - 10017293), Magnolia District, Boulder Co., Colorado, USA
    813Unknown Gold Occurrence (MRDS - 10017366), Magnolia District, Boulder Co., Colorado, USA
    814Unknown Gold Occurrence (MRDS - 10017396), Sugarloaf District, Boulder Co., Colorado, USA
    815Unknown Gold Occurrence (MRDS - 10017510), Gold Hill District, Boulder Co., Colorado, USA
    816Unknown Gold Occurrence (MRDS - 10017606), Ward District, Boulder Co., Colorado, USA
    817Unknown Gold Occurrence (MRDS - 10017607), Ward District, Boulder Co., Colorado, USA
    818Unknown Gold Occurrence (MRDS - 10017618), Gold Hill District, Boulder Co., Colorado, USA
    819Unknown Gold Occurrence (MRDS - 10017619), Gold Hill District, Boulder Co., Colorado, USA
    820Unknown Gold Occurrence (MRDS - 10018024), Jamestown District, Boulder Co., Colorado, USA
    821Unknown Gold Occurrence (MRDS - 10018032), Jamestown District, Boulder Co., Colorado, USA
    822Unknown Gold Occurrence (MRDS - 10018037), Jamestown District, Boulder Co., Colorado, USA
    823Unknown Gold Occurrence (MRDS - 10018052), Jamestown District, Boulder Co., Colorado, USA
    824Unknown Gold Occurrence (MRDS - 10018061), Jamestown District, Boulder Co., Colorado, USA
    825Unknown Gold Occurrence (MRDS - 10018288), Gold Hill District, Boulder Co., Colorado, USA
    826Unknown Gold Occurrence (MRDS - 10018300), Ward District, Boulder Co., Colorado, USA
    827Unknown Gold Occurrence (MRDS - 10091227), Magnolia District, Boulder Co., Colorado, USA
    828Unknown Gold Occurrence (MRDS - 10091233), Nederland District, Boulder Co., Colorado, USA
    829Unknown Gold Occurrence (MRDS - 10091288), Nederland District, Boulder Co., Colorado, USA
    830Unknown Gold Occurrence (MRDS - 10091290), Magnolia District, Boulder Co., Colorado, USA
    831Unknown Gold Occurrence (MRDS - 10091306), Ward District, Boulder Co., Colorado, USA
    832Unknown Gold Occurrence (MRDS - 10091358), Ward District, Boulder Co., Colorado, USA
    833Unknown Gold Occurrence (MRDS - 10091435), Jamestown District, Boulder Co., Colorado, USA
    834Unknown Gold Occurrence (MRDS - 10091444), Gold Hill District, Boulder Co., Colorado, USA
    835Unknown Gold Occurrence (MRDS - 10091486), Magnolia District, Boulder Co., Colorado, USA
    836Unknown Lead - Silver - Zinc Occurrence (MRDS - 10017391), Gold Hill District, Boulder Co., Colorado, USA
    837Unknown Mica (MRDS - 10108334), Boulder Co., Colorado, USA
    838Unknown Molybdenum Occurrence (MRDS - 10017284), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    839Unknown Molybdenum Occurrence (MRDS - 10017365), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    840Unknown Molybdenum Occurrence (MRDS - 10018001), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    841Unknown Quartz - Feldspar Occurrence (MRDS - 10117140), Ward District, Boulder Co., Colorado, USA
    842Unknown Quartz - Feldspar Occurrence (MRDS - 10238892), Jamestown District, Boulder Co., Colorado, USA
    843Unknown Silver - Gold Occurrence (MRDS - 10017276), Boulder Co., Colorado, USA
    844Unknown Silver - Gold Occurrence (MRDS - 10017279), Boulder Co., Colorado, USA
    845Unknown Silver - Gold Occurrence (MRDS - 10018187), Gold Hill District, Boulder Co., Colorado, USA
    846Unknown Silver - Gold Occurrence (MRDS - 10018189), Boulder Co., Colorado, USA
    847Unknown Silver - Gold Occurrence (MRDS - 10091285), Nederland District, Boulder Co., Colorado, USA
    848Unknown Silver - Lead - Zinc (MRDS - 10018120), Caribou District, Boulder Co., Colorado, USA
    849Unknown Silver Occurrence (MRDS - 10017327), Magnolia District, Boulder Co., Colorado, USA
    850Unknown Silver Occurrence (MRDS - 10017330), Caribou District, Boulder Co., Colorado, USA
    851Unknown Stone - Crushed/Broken Occurrence (MRDS - 10016998), Boulder Co., Colorado, USA
    852Unknown Stone - Crushed/Broken Occurrence (MRDS - 10017000), Boulder Co., Colorado, USA
    853Unknown Stone - Crushed/Broken Occurrence (MRDS - 10017413), Boulder Co., Colorado, USA
    854Unknown Tin Occurrence (MRDS - 10017288), Arapahoe Peak, Boulder Co., Colorado, USA
    855Unknown Tungsten Occurrence (MRDS - 10017297), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    856Unknown Tungsten Occurrence (MRDS - 10017524), Sugarloaf District, Boulder Co., Colorado, USA
    857Unknown Uranium Occurrence (MRDS - 10017616), Gold Hill District, Boulder Co., Colorado, USA
    858Unknown Uranium Occurrence (MRDS - 10017623), Gold Hill District, Boulder Co., Colorado, USA
    859Unknown Uranium Occurrence (MRDS - 10018191), Gold Hill District, Boulder Co., Colorado, USA
    860Unknown Uranium Occurrence (MRDS - 10018195), Gold Hill District, Boulder Co., Colorado, USA
    861Unknown Uranium Occurrence (MRDS - 10091481), Gold Hill District, Boulder Co., Colorado, USA
    862Unknown Zinc - Lead (MRDS - 10018047), Jamestown District, Boulder Co., Colorado, USA
    863Unnamed chrysotile dike, Magnolia District, Boulder Co., Colorado, USA
    864Unnamed pegmatite, Wallstreet, Boulder Co., Colorado, USA
    865Unnamed prospect, Bald Mountain, Crisman, Boulder Co., Colorado, USA
    866Unnamed prospect, Sherwood Gulch, Nederland District, Boulder Co., Colorado, USA
    867Unnamed prospects, North Boulder Creek, Boulder Co., Colorado, USA
    868Up To Date Mine, Caribou District, Boulder Co., Colorado, USA
    869Utica Occurrence, Gold Hill District, Boulder Co., Colorado, USA
    870Valley Forge Occurrence (Critic and Railroad Boy; Sunshine; Ingram; Three Brothers; Atchison; Belle; Golden Eagle; Melvina; Baron; Richmond), Gold Hill District, Boulder Co., Colorado, USA
    871Valley View, Magnolia District, Boulder Co., Colorado, USA
    872Vasco No. 1 Mine, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    873Vasco No. 2 & 5, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    874Vasco No. 6, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    875Vasco No. 7, Nederland District, Boulder Co., Colorado, USA
    876Vasco No. 8; Barker Nos. 1; 2; 4; Bonanza; Clark Tunnel Occurrence, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    877Vasco Nos. 4; 10 (Cross No. 1), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    878Victor Mine, Front Range, Boulder Co., Colorado, USA
    879Victoria (Scotia Occurrence), Gold Hill District, Boulder Co., Colorado, USA
    880Victory Lode Claim, Central Mining District, Boulder Co., Colorado, USA
    881Vinegar, Nederland District, Boulder Co., Colorado, USA
    882Viola Beatty Claim, Gold Hill District, Boulder Co., Colorado, USA
    883Virginia (Golden Key), Gold Hill District, Boulder Co., Colorado, USA
    884Virginia Shaft, Nederland District, Boulder Co., Colorado, USA
    885Wa Ba Na Occurrence (Tillie Butzel; Pennsylvania; Washington Irving; Nil Desperandum; Cleveland; Sun and Moon; St Louis; Grace; Burlington; Hidden Treasure; Delaware Group; Oceanic; Collins), Ward District, Boulder Co., Colorado, USA
    886Wade Hampton Mine, Caribou District, Boulder Co., Colorado, USA
    887Wagner, Nederland District, Boulder Co., Colorado, USA
    888Walker Ranch, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    889Walker Tunnel, Jamestown District, Boulder Co., Colorado, USA
    890Wano Mine, Jamestown, Jamestown District, Boulder Co., Colorado, USA
    891Ward District, Boulder Co., Colorado, USA
    892Ward H. Lamon, Gold Hill District, Boulder Co., Colorado, USA
    893Ward Rose Occurrence, Gold Hill District, Boulder Co., Colorado, USA
    894Ward, Gold Hill District, Boulder Co., Colorado, USA
    895Warren Spar Occurrence, Jamestown District, Boulder Co., Colorado, USA
    896Washburn Mine, Sunshine, Boulder Co., Colorado, USA
    897Washington Irving, Ward District, Boulder Co., Colorado, USA
    898West End Occurrence (Silver Resumption; Furlong; Jackpot; Park; Roy; Rag Tag No. 2; Looking Backward), Boulder Co., Colorado, USA
    899West Sugarloaf Mountain, Boulder Co., Colorado, USA
    900Western Slope, Nederland District, Boulder Co., Colorado, USA
    901Western Star, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    902White and Headley Gold Mine Property, Gold Hill District, Boulder Co., Colorado, USA
    903White Cloud & Helena Mines, Ward District, Boulder Co., Colorado, USA
    904White Crow, Gold Hill District, Boulder Co., Colorado, USA
    905White Eagle (Archer), Gold Hill District, Boulder Co., Colorado, USA
    906White Raven Mine, Ward, Ward District, Boulder Co., Colorado, USA
    907White Rock, Boulder Co., Colorado, USA
    908White Rock, Gold Hill District, Boulder Co., Colorado, USA
    909White, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    910Who Do, Gold Hill District, Boulder Co., Colorado, USA
    911Wigwam, Caribou District, Boulder Co., Colorado, USA
    912Wild Dutchman, Gold Hill District, Boulder Co., Colorado, USA
    913Wild Tiger Mine, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    914Wilderness (Wilderness 2 & 3 Great Northern M.S.; Great Northern 1-15 Occurrence), Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    915Willard Placer (Violet Ray; Amazon; Rose M.; Esmeralda; E. W. Cobb Placer; Huntington Placer), Jamestown District, Boulder Co., Colorado, USA
    916William E. Walker Mine, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    917Williamson, Jamestown District, Boulder Co., Colorado, USA
    918Wilson beryl prospect, Gold Hill District, Boulder Co., Colorado, USA
    919Winona, Gold Hill District, Boulder Co., Colorado, USA
    920Wisconsin, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    921Wolf Tongue, Ward District, Boulder Co., Colorado, USA
    922Wood Chuck, Gold Hill District, Boulder Co., Colorado, USA
    923Wood Mountain Group, Gold Hill District, Boulder Co., Colorado, USA
    924World Mine, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    925X Ray and Sherly, Boulder Co. Tungsten District, Boulder Co., Colorado, USA
    926Yellow Girl (Allied Jamestown; Yellow Girl Tunnel), Jamestown District, Boulder Co., Colorado, USA
    927Yellow Jacket, Boulder Co., Colorado, USA
    928Yellow Pine, Sugarloaf District, Boulder Co., Colorado, USA
    929Zephyr Occurrence, Magnolia District, Boulder Co., Colorado, USA

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