| Mines, Pits, Quarries and Shafts |
| Colorado |
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| Feature Name | County | Class | Latitude | Longitude | 1:24,000 USGS Topographic Map |
Elevation in Feet |
Feature ID |
| Adams Aggregate Incorporated Pit | Adams | Mine | 395700N | 1045136W | Brighton | 4993 | 1703851 |
| Adams County Pit | Adams | Mine | 395627N | 1045240W | Eastlake | 5056 | 1703845 |
| Albert Frei and Sons Sand and Gravel Pit | Adams | Mine | 395040N | 1045541W | Commerce City | 5092 | 1703856 |
| Brannan Sand and Gravel Company Pit | Adams | Mine | 395418N | 1045920W | Eastlake | 5417 | 1703846 |
| C and H Construction Company Pit | Adams | Mine | 394958N | 1045550W | Commerce City | 5131 | 1703857 |
| Colorado Consolidated Rock Pit | Adams | Mine | 395329N | 1045343W | Eastlake | 4990 | 1703847 |
| Colorado-Wyoming Improvement Company Pit | Adams | Mine | 394906N | 1045920W | Commerce City | 5161 | 1703858 |
| Cooley Gravel Company Pit | Adams | Mine | 395145N | 1045455W | Commerce City | 5075 | 1703859 |
| Department of Wildlife Pit | Adams | Mine | 394929N | 1045726W | Commerce City | 5157 | 1703860 |
| Enterprise Mine | Adams | Mine | 395750N | 1050337W | Lafayette | 5308 | 1763890 |
| Fast Construction Company Pit | Adams | Mine | 395024N | 1045537W | Commerce City | 5161 | 1703861 |
| Henderson Pit | Adams | Mine | 395450N | 1045219W | Brighton | 5023 | 1703852 |
| Houston Construction Pit | Adams | Mine | 395002N | 1045550W | Commerce City | 5134 | 1703862 |
| Imperial Shaft | Adams | Mine | 395843N | 1050055W | Lafayette | 5321 | 1685211 |
| Jones Fine Sand Company Pit | Adams | Mine | 394744N | 1045550W | Commerce City | 5180 | 1703863 |
| Kilgore-Atchinson Pit | Adams | Mine | 395000N | 1045558W | Commerce City | 5131 | 1703864 |
| Kilgore-Atchison Pit | Adams | Mine | 395634N | 1045119W | Brighton | 4977 | 1703853 |
| Mobile Pre-mix Concrete Incorporated Pit | Adams | Mine | 395103N | 1045550W | Commerce City | 5079 | 1703865 |
| Northwestern Engineering Company Pit | Adams | Mine | 395011N | 1045818W | Commerce City | 5148 | 1703866 |
| Pete Kiewit Sons Pit | Adams | Mine | 394910N | 1045842W | Commerce City | 5167 | 1703867 |
| Pink Greenhouses Pit | Adams | Mine | 395149N | 1045442W | Commerce City | 5098 | 1703868 |
| Platte Valley Sand and Gravel Pit | Adams | Mine | 395337N | 1045417W | Eastlake | 5043 | 1703848 |
| Scranton Mine | Adams | Mine | 394730N | 1044402W | Denver International Airport | 5443 | 1703872 |
| Sterling Pit | Adams | Mine | 395026N | 1045530W | Commerce City | 5128 | 1703869 |
| Suburban Sand and Gravel Company Pit | Adams | Mine | 395418N | 1045343W | Eastlake | 5033 | 1703849 |
| Superior Sand and Gravel Company Pit | Adams | Mine | 394729N | 1045451W | Commerce City | 5187 | 1703870 |
| Tee Pee Construction Company Pit | Adams | Mine | 395437N | 1045157W | Brighton | 5026 | 1703854 |
| Thomas Mine | Adams | Mine | 395854N | 1040922W | Leader NW | 4882 | 1703855 |
| Two Shafts Mine | Adams | Mine | 394543N | 1044002W | Denver International Airport | 5620 | 1703873 |
| Western Paving Company Pit | Adams | Mine | 395257N | 1045400W | Eastlake | 5043 | 1703850 |
| Western Paving Company Pit | Adams | Mine | 394906N | 1045756W | Commerce City | 5154 | 1703871 |
| Blanca Mine | Alamosa | Mine | 373411N | 1053036W | Twin Peaks | 11952 | 1735098 |
| Harmony Pit | Alamosa | Mine | 372839N | 1055258W | Alamosa West | 7546 | 1735110 |
| Swab Mine | Alamosa | Mine | 373236N | 1053141W | Twin Peaks | 9921 | 192720 |
| Big Dry Creek Placers | Arapahoe | Mine | 393505N | 1045704W | Highlands Ranch | 5568 | 1735722 |
| Buckley Field Manganese Deposit Mine | Arapahoe | Mine | 394259N | 1044142W | Coal Creek | 5597 | 1703877 |
| Buckley Field Manganese Deposit Number One Mine | Arapahoe | Mine | 393610N | 1043649W | Watkins SE | 5896 | 1703878 |
| Cherry Creek Mine | Arapahoe | Mine | 393517N | 1045447W | Highlands Ranch | 5656 | 1735723 |
| Cherry Creek Placers | Arapahoe | Mine | 393807N | 1044954W | Fitzsimons | 5653 | 1703876 |
| Clarke Pit | Arapahoe | Mine | 393636N | 1050125W | Littleton | 5315 | 1703705 |
| Denver Basin Manganese Deposits Mine | Arapahoe | Mine | 393514N | 1043438W | Watkins SE | 6050 | 1703879 |
| H W Siddle Incorporated Pit | Arapahoe | Mine | 394446N | 1044759W | Fitzsimons | 5420 | 1703875 |
| Littleton Pit | Arapahoe | Mine | 393454N | 1050154W | Littleton | 5344 | 1703706 |
| Chimney Rock Coal Mine | Archuleta | Mine | 371133N | 1071736W | Chimney Rock | 6922 | 1734997 |
| Columbine Mine | Archuleta | Mine | 371647N | 1072705W | Baldy Mountain | 7730 | 184239 |
| Cooper Mine | Archuleta | Mine | 371712N | 1072743W | Baldy Mountain | 7766 | 1734986 |
| Copper Queen Mine | Archuleta | Mine | 371555N | 1070037W | Pagosa Springs | 7060 | 1734988 |
| Cox Mine | Archuleta | Mine | 371848N | 1065932W | Jackson Mountain | 7516 | 1735061 |
| Dowell Mine | Archuleta | Mine | 371848N | 1065932W | Jackson Mountain | 7516 | 1735060 |
| Iceland Spar Mine | Archuleta | Mine | 372215N | 1070035W | Pagosa Springs | 8238 | 1734989 |
| Italian Mine | Archuleta | Mine | 370617N | 1071045W | Pagosa Junction | 6667 | 1735649 |
| Kleckner Mine | Archuleta | Mine | 371844N | 1065407W | Jackson Mountain | 7982 | 1735062 |
| Meadows Property Mine | Archuleta | Mine | 372218N | 1070705W | Pagosa Springs | 8209 | 1734990 |
| Medicine Mine | Archuleta | Mine | 372105N | 1072401W | Baldy Mountain | 9787 | 184279 |
| Seavy Ranch Mine | Archuleta | Mine | 371335N | 1070138W | Oakbrush Hill | 7090 | 1735648 |
| Shamrock Mine | Archuleta | Mine | 371802N | 1072910W | Baldy Mountain | 7769 | 1734987 |
| Treasure-Comstock Mine | Archuleta | Mine | 371555N | 1070037W | Pagosa Springs | 7060 | 1734991 |
| Triple S Mine | Archuleta | Mine | 371746N | 1072830W | Baldy Mountain | 7533 | 184247 |
| Allen Jones Mine | Bent | Mine | 373904N | 1030931W | Ninaview | 4383 | 1735245 |
| Bentco Mine | Bent | Mine | 374125N | 1031554W | Rock Canyon | 4367 | 1735244 |
| Marlman Quarry | Bent | Mine | 380710N | 1031752W | Cornelia | 4052 | 1735366 |
| 1903 Mine | Boulder | Mine | 395746N | 1053036W | Nederland | 8235 | 1685000 |
| Acme Mine | Boulder | Mine | 395855N | 1050812W | Louisville | 5387 | 1685160 |
| Afterthought Mine | Boulder | Mine | 400720N | 1052402W | Gold Hill | 7451 | 1683601 |
| Ajax Mine | Boulder | Mine | 395840N | 1050812W | Louisville | 5371 | 1685161 |
| Alamakee Mine | Boulder | Mine | 400358N | 1052421W | Gold Hill | 8241 | 178538 |
| Alan-Bond Mine | Boulder | Mine | 395855N | 1051127W | Louisville | 5410 | 1685162 |
| Alaska Tunnel | Boulder | Mine | 400424N | 1053026W | Ward | 9124 | 1683651 |
| Alcyone Mine | Boulder | Mine | 400424N | 1053026W | Ward | 9124 | 1683653 |
| Alhambra Mine | Boulder | Mine | 395935N | 1053436W | Nederland | 10003 | 1684931 |
| Alice Open Pit | Boulder | Mine | 400745N | 1052345W | Raymond | 7467 | 1683598 |
| Allied Gold Mining Company Mine | Boulder | Mine | 395935N | 1053436W | Nederland | 10003 | 1684932 |
| Allon Shaft | Boulder | Mine | 395750N | 1050332W | Lafayette | 5338 | 1685214 |
| Alpine Horn Mine | Boulder | Mine | 400139N | 1052442W | Gold Hill | 8084 | 1683414 |
| Alton Tunnel | Boulder | Mine | 395806N | 1053221W | Nederland | 8579 | 181106 |
| Alturas Mine | Boulder | Mine | 400402N | 1052425W | Gold Hill | 8117 | 1683415 |
| Amalban Thief Mine | Boulder | Mine | 400116N | 1052514W | Gold Hill | 8117 | 1683416 |
| American Mine | Boulder | Mine | 400356N | 1052205W | Boulder | 7214 | 1683802 |
| Amy Paul Mine | Boulder | Mine | 395652N | 1053418W | Nederland | 8786 | 1684933 |
| Anchor Mine | Boulder | Mine | 395746N | 1053036W | Nederland | 8235 | 1684934 |
| Anna C Mine | Boulder | Mine | 395845N | 1053132W | Nederland | 8665 | 1684935 |
| April Fool Mine | Boulder | Mine | 400027N | 1052408W | Gold Hill | 7441 | 1683417 |
| Arapahoe Group of Claims | Boulder | Mine | 400305N | 1053042W | Ward | 9186 | 1683654 |
| Arapahoe Pit | Boulder | Mine | 400108N | 1051641W | Boulder | 5354 | 1683803 |
| Archer Mine | Boulder | Mine | 400347N | 1052156W | Boulder | 7103 | 1683804 |
| Argo Mine | Boulder | Mine | 400747N | 1052402W | Raymond | 7418 | 178254 |
| Arrow Mine | Boulder | Mine | 395855N | 1050812W | Louisville | 5387 | 1685215 |
| Arrowhead Mine | Boulder | Mine | 400349N | 1052427W | Gold Hill | 8277 | 1683418 |
| Atchison and Eldorado Mine | Boulder | Mine | 400349N | 1052427W | Gold Hill | 8277 | 1683419 |
| Atlanta Mine | Boulder | Mine | 400330N | 1052349W | Gold Hill | 7539 | 1683420 |
| Atlantic Mine | Boulder | Mine | 400823N | 1052539W | Raymond | 8399 | 1683602 |
| Audophone Mine | Boulder | Mine | 395901N | 1052227W | Eldorado Springs | 7634 | 1685112 |
| Aztec Mine | Boulder | Mine | 400010N | 1052250W | Gold Hill | 6571 | 1683421 |
| B and M Mine | Boulder | Mine | 400355N | 1052943W | Gold Hill | 9022 | 1683423 |
| Badger Mine | Boulder | Mine | 400636N | 1052131W | Boulder | 6585 | 1683805 |
| Bailey Gravel Pit | Boulder | Mine | 400303N | 1050303W | Erie | 5023 | 1683936 |
| Baker Mine | Boulder | Mine | 395935N | 1050412W | Lafayette | 5161 | 1683937 |
| Barker Mine | Boulder | Mine | 395813N | 1052851W | Tungsten | 8123 | 1685041 |
| Barron Mine | Boulder | Mine | 400108N | 1051641W | Boulder | 5354 | 1683806 |
| Beaver Lake Mine | Boulder | Mine | 400705N | 1053102W | Ward | 9216 | 1683656 |
| Beddig Mine | Boulder | Mine | 395856N | 1053138W | Nederland | 8661 | 1684936 |
| Beggar Mine | Boulder | Mine | 395937N | 1052208W | Eldorado Springs | 7375 | 1685113 |
| Belcher Mine | Boulder | Mine | 395935N | 1053436W | Nederland | 10003 | 1684937 |
| Bell Mine | Boulder | Mine | 400349N | 1052427W | Gold Hill | 8277 | 1683424 |
| Belle Mine | Boulder | Mine | 400316N | 1052301W | Gold Hill | 7041 | 1683425 |
| Belle of Memphis Mine | Boulder | Mine | 400357N | 1052235W | Gold Hill | 7802 | 1683426 |
| Bellvue Mine | Boulder | Mine | 400340N | 1052408W | Gold Hill | 8002 | 1683427 |
| Belmont Mine | Boulder | Mine | 400108N | 1051641W | Boulder | 5354 | 1683807 |
| Ben C Lowell Mine | Boulder | Mine | 395919N | 1052217W | Eldorado Springs | 7395 | 1685114 |
| Beryl Lode Claim Mine | Boulder | Mine | 400634N | 1051958W | Boulder | 6407 | 1683914 |
| Beryl Number One Claim | Boulder | Mine | 400434N | 1052141W | Boulder | 7405 | 1683916 |
| Beryl Number Two Claim | Boulder | Mine | 400434N | 1052141W | Boulder | 7405 | 1683917 |
| Big Cameron Mine | Boulder | Mine | 395932N | 1052717W | Tungsten | 8113 | 1685042 |
| Big Five Mine | Boulder | Mine | 400424N | 1053026W | Ward | 9124 | 1683657 |
| Big Five Mine | Boulder | Mine | 395804N | 1051119W | Louisville | 5636 | 1685163 |
| Big Horn Mine | Boulder | Mine | 400346N | 1052332W | Gold Hill | 7848 | 1683428 |
| Big Lake Mine | Boulder | Mine | 395948N | 1050701W | Lafayette | 5338 | 1685216 |
| Big Moon Mine | Boulder | Mine | 395414N | 1053144W | Nederland | 9042 | 1685006 |
| Big Six Mine | Boulder | Mine | 395750N | 1053047W | Nederland | 8284 | 1684938 |
| Bigthing Mine | Boulder | Mine | 400725N | 1052412W | Gold Hill | 7713 | 1683603 |
| Bird Nest and Village Belle Mine | Boulder | Mine | 395642N | 1053422W | Nederland | 9380 | 181066 |
| Bismark Mine | Boulder | Mine | 400203N | 1052828W | Gold Hill | 8195 | 1683429 |
| Black Bear Mine | Boulder | Mine | 395929N | 1052229W | Eldorado Springs | 7175 | 1685115 |
| Black Cloud Mine | Boulder | Mine | 400350N | 1052323W | Gold Hill | 8150 | 1683430 |
| Black Diamond Mine | Boulder | Mine | 395655N | 1051402W | Louisville | 5627 | 1685164 |
| Black Diamond Number Two Mine | Boulder | Mine | 395855N | 1051147W | Louisville | 5381 | 1685165 |
| Black Hope Number One Mine | Boulder | Mine | 400658N | 1052317W | Gold Hill | 6952 | 1683431 |
| Black Jack Mine | Boulder | Mine | 400357N | 1053037W | Ward | 9272 | 1683658 |
| Black Jack Mine | Boulder | Mine | 400631N | 1051901W | Boulder | 6234 | 1683808 |
| Black Prince Mine | Boulder | Mine | 400009N | 1052343W | Gold Hill | 6706 | 1683432 |
| Black Rose Mine | Boulder | Mine | 400658N | 1052317W | Gold Hill | 6952 | 1683433 |
| Black Rover Mine | Boulder | Mine | 395630N | 1052915W | Tungsten | 8451 | 1685043 |
| Blackhawk Mine | Boulder | Mine | 400347N | 1052337W | Gold Hill | 7792 | 178534 |
| Blackhawk Shaft | Boulder | Mine | 395647N | 1053006W | Nederland | 8619 | 181056 |
| Blue Goose Mine | Boulder | Mine | 395848N | 1051122W | Louisville | 5426 | 1685166 |
| Blue Grouse Mine | Boulder | Mine | 395309N | 1053247W | Nederland | 9921 | 1685007 |
| Blue Jay Mine | Boulder | Mine | 400638N | 1052301W | Gold Hill | 6975 | 1683410 |
| Blue Ribbon Mine | Boulder | Mine | 400108N | 1051641W | Boulder | 5354 | 1683809 |
| Blue Stones Mine | Boulder | Mine | 395616N | 1053922W | East Portal | 10896 | 1684927 |
| Bluebird Mine | Boulder | Mine | 395949N | 1053202W | Nederland | 8776 | 181113 |
| Bonanza Mine | Boulder | Mine | 400658N | 1052317W | Gold Hill | 6952 | 1683422 |
| Bonanza Number Two Mine | Boulder | Mine | 395910N | 1052819W | Tungsten | 8081 | 1685044 |
| Bondholder Mine | Boulder | Mine | 400517N | 1052432W | Gold Hill | 8842 | 1683434 |
| Boodle Mine | Boulder | Mine | 395927N | 1052151W | Eldorado Springs | 7123 | 1685116 |
| Boston Mine | Boulder | Mine | 400424N | 1053026W | Ward | 9124 | 1683659 |
| Boulder County Mine | Boulder | Mine | 395841N | 1053321W | Nederland | 9472 | 181092 |
| Boulder County Tunnel | Boulder | Mine | 395810N | 1053302W | Nederland | 8793 | 181091 |
| Boulder Mine | Boulder | Mine | 400139N | 1052403W | Gold Hill | 7680 | 1683811 |
| Boulder Pit Number 485 | Boulder | Mine | 400108N | 1051641W | Boulder | 5354 | 1683810 |
| Boulder Valley Mine | Boulder | Mine | 400350N | 1050317W | Erie | 4997 | 1683938 |
| Boulder Valley Mine | Boulder | Mine | 400220N | 1050111W | Erie | 5197 | 1683968 |
| Boulder Valley Mine | Boulder | Mine | 400258N | 1050233W | Erie | 5052 | 1683969 |
| Brace Mine | Boulder | Mine | 395620N | 1053037W | Nederland | 8461 | 1684939 |
| Bradshaw Mine | Boulder | Mine | 400933N | 1052730W | Raymond | 7739 | 1683604 |
| Brannan Pit Number 14 | Boulder | Mine | 400108N | 1051641W | Boulder | 5354 | 1683812 |
| Brannan Sand and Gravel Company Pit | Boulder | Mine | 400201N | 1051233W | Niwot | 5167 | 1683927 |
| Brennan Mine | Boulder | Mine | 400300N | 1050352W | Erie | 5062 | 1683939 |
| Briggs Mine | Boulder | Mine | 400238N | 1050312W | Erie | 5046 | 1683970 |
| Brodies Saint Vrain Quarry | Boulder | Mine | 401331N | 1051603W | Lyons | 5377 | 1763893 |
| Brooks Mine | Boulder | Mine | 395840N | 1050812W | Louisville | 5371 | 1685167 |
| Brown Mine | Boulder | Mine | 400658N | 1052317W | Gold Hill | 6952 | 1683451 |
| Brown Spar Mine | Boulder | Mine | 400729N | 1052341W | Gold Hill | 7392 | 1683435 |
| Buckhorn Mine | Boulder | Mine | 400735N | 1052327W | Raymond | 7858 | 1683605 |
| Buckskin Joe Number One Mine | Boulder | Mine | 400108N | 1051641W | Boulder | 5354 | 1683796 |
| Buena Ventura Mine | Boulder | Mine | 400424N | 1053026W | Ward | 9124 | 1683660 |
| Buena Vista Mine Number One | Boulder | Mine | 400723N | 1052052W | Boulder | 7739 | 1683910 |
| Buena Vista Mine Number Three | Boulder | Mine | 400723N | 1052052W | Boulder | 7739 | 1683912 |
| Buena Vista Mine Number Two | Boulder | Mine | 400723N | 1052052W | Boulder | 7739 | 1683911 |
| Bueno Mine | Boulder | Mine | 400649N | 1052446W | Gold Hill | 7680 | 1683436 |
| Burlington Mine | Boulder | Mine | 400740N | 1052354W | Raymond | 7339 | 178253 |
| Button R Dam Mine | Boulder | Mine | 401011N | 1050610W | Longmont | 4984 | 1683642 |
| C and M Gravel Pit | Boulder | Mine | 400303N | 1050303W | Erie | 5023 | 1683940 |
| Cactus Mine | Boulder | Mine | 395858N | 1051110W | Louisville | 5420 | 1685168 |
| Caledonia Mine | Boulder | Mine | 395845N | 1050807W | Louisville | 5364 | 1685169 |
| California Mine | Boulder | Mine | 395906N | 1052239W | Tungsten | 7736 | 1685045 |
| Cal-Wood Mica Mine | Boulder | Mine | 400926N | 1052141W | Lyons | 7316 | 1683634 |
| Cambro Mine | Boulder | Mine | 395935N | 1050502W | Lafayette | 5187 | 1685217 |
| Canfield Mine | Boulder | Mine | 395740N | 1050342W | Lafayette | 5358 | 1683941 |
| Cannon Mine | Boulder | Mine | 395935N | 1050507W | Lafayette | 5190 | 1685218 |
| Capitol Mine | Boulder | Mine | 395935N | 1050422W | Lafayette | 5167 | 1685219 |
| Carfield Mine | Boulder | Mine | 400108N | 1051641W | Boulder | 5354 | 1683813 |
| Caribou Shaft | Boulder | Mine | 395852N | 1053502W | Nederland | 10236 | 181101 |
| Carl Gardner Mine | Boulder | Mine | 400504N | 1052332W | Gold Hill | 8159 | 1683814 |
| Carol Gore Quarry | Boulder | Mine | 401331N | 1051603W | Lyons | 5377 | 1763894 |
| Caryl Pallot Mine | Boulder | Mine | 395957N | 1050334W | Lafayette | 5111 | 1685220 |
| Cash Mine | Boulder | Mine | 400343N | 1052403W | Gold Hill | 8048 | 178533 |
| Cash Mine | Boulder | Mine | 395940N | 1052147W | Eldorado Springs | 7093 | 1685117 |
| Cashier Mine | Boulder | Mine | 400813N | 1052226W | Lyons | 7641 | 1683621 |
| Castastrophe Mine | Boulder | Mine | 400023N | 1052439W | Gold Hill | 7529 | 178581 |
| Castle Gulch Mine | Boulder | Mine | 400658N | 1052317W | Gold Hill | 6952 | 1683437 |
| Celestial Mine | Boulder | Mine | 400438N | 1052336W | Gold Hill | 7175 | 1683661 |
| Centennial Mine | Boulder | Mine | 395750N | 1050707W | Lafayette | 5321 | 1685221 |
| Champion Mine | Boulder | Mine | 395828N | 1050927W | Louisville | 5512 | 1685170 |
| Chancellor Mine | Boulder | Mine | 400724N | 1052348W | Gold Hill | 7231 | 1735877 |
| Chase Mine | Boulder | Mine | 400250N | 1050402W | Erie | 5089 | 1683942 |
| Chaves Mine | Boulder | Mine | 395724N | 1053006W | Nederland | 8563 | 1684930 |
| Clara May Mine | Boulder | Mine | 395929N | 1052140W | Eldorado Springs | 7050 | 1685118 |
| Clara Mine | Boulder | Mine | 395652N | 1053418W | Nederland | 8786 | 1684940 |
| Clark Tunnel | Boulder | Mine | 395812N | 1052849W | Tungsten | 8045 | 181149 |
| Clayton Mine | Boulder | Mine | 400307N | 1050039W | Erie | 5174 | 1683971 |
| Clemens Quarry | Boulder | Mine | 400747N | 1051821W | Lyons | 6089 | 1683622 |
| Cleveland Mine | Boulder | Mine | 400429N | 1052203W | Boulder | 7648 | 1683816 |
| Cleveland Mine | Boulder | Mine | 400205N | 1050357W | Erie | 5144 | 1683943 |
| Clipper Mine | Boulder | Mine | 400210N | 1052332W | Gold Hill | 7142 | 1683438 |
| Clyde Shaft | Boulder | Mine | 395847N | 1052956W | Tungsten | 8455 | 181153 |
| Clyde Tunnel | Boulder | Mine | 395852N | 1062953W | Sheephorn Mountain | 7306 | 181152 |
| Cobalt Mine | Boulder | Mine | 400300N | 1052022W | Boulder | 6883 | 1683791 |
| Cobalt Mining Company Mine | Boulder | Mine | 400317N | 1052511W | Gold Hill | 8386 | 1683788 |
| Cold Spring Mine | Boulder | Mine | 400405N | 1052426W | Gold Hill | 8130 | 178539 |
| Cold Spring Mine | Boulder | Mine | 395848N | 1053544W | Nederland | 10279 | 1685046 |
| Cold Spring One Mine | Boulder | Mine | 395746N | 1053036W | Nederland | 8235 | 1684941 |
| Cold Spring Three Mine | Boulder | Mine | 395746N | 1053036W | Nederland | 8235 | 1684942 |
| Cold Springs Number Four Mine | Boulder | Mine | 395746N | 1053036W | Nederland | 8235 | 1684943 |
| Colorado Brick Pit | Boulder | Mine | 400201N | 1051233W | Niwot | 5167 | 1683928 |
| Colorado Mine | Boulder | Mine | 400312N | 1052358W | Gold Hill | 7634 | 1683439 |
| Colorado Miracle Mine | Boulder | Mine | 400108N | 1051641W | Boulder | 5354 | 1683817 |
| Colorado Peak Industries Mine | Boulder | Mine | 400705N | 1053108W | Ward | 9206 | 1683662 |
| Colorado Springs Tungsten Placer Mine | Boulder | Mine | 395746N | 1053036W | Nederland | 8235 | 1684944 |
| Columbia Mine | Boulder | Mine | 400210N | 1053152W | Ward | 9488 | 1683663 |
| Columbus Mine | Boulder | Mine | 400358N | 1052355W | Gold Hill | 8402 | 1683440 |
| Comstock and Pandora Mine | Boulder | Mine | 395935N | 1053436W | Nederland | 10003 | 1684945 |
| Comstock Mine | Boulder | Mine | 395921N | 1053421W | Nederland | 10043 | 1684928 |
| Comstock Peat Lode Mine | Boulder | Mine | 395746N | 1053036W | Nederland | 8235 | 1684946 |
| Conger Mine | Boulder | Mine | 395831N | 1053121W | Nederland | 8632 | 181110 |
| Congo Chief Mine | Boulder | Mine | 395935N | 1053436W | Nederland | 10003 | 1684947 |
| Consolation Mine | Boulder | Mine | 400820N | 1052443W | Raymond | 7818 | 1683606 |
| Consolidated Caribou Silver Mine | Boulder | Mine | 395700N | 1053202W | Nederland | 8474 | 1684948 |
| Cook Mine | Boulder | Mine | 395740N | 1051247W | Louisville | 5653 | 1685171 |
| Copeland Group Mine | Boulder | Mine | 395752N | 1052155W | Eldorado Springs | 7736 | 1685157 |
| Copeland Mine | Boulder | Mine | 400108N | 1051641W | Boulder | 5354 | 1683818 |
| Copeland Mines | Boulder | Mine | 395752N | 1052155W | Eldorado Springs | 7736 | 1685158 |
| Copper Blush Mine | Boulder | Mine | 400839N | 1052201W | Lyons | 7392 | 1683623 |
| Copper Glance Mine | Boulder | Mine | 400214N | 1052930W | Gold Hill | 8793 | 1683441 |
| Copper King Mine | Boulder | Mine | 400319N | 1052513W | Gold Hill | 8307 | 1683413 |
| Copper King Mine | Boulder | Mine | 395321N | 1053257W | Nederland | 9875 | 1685005 |
| Copper King Nickel Mine | Boulder | Mine | 400449N | 1051619W | Boulder | 5446 | 1683918 |
| Cordova Mine | Boulder | Mine | 400658N | 1052317W | Gold Hill | 6952 | 1683479 |
| Corning Tunnel | Boulder | Mine | 400417N | 1052404W | Gold Hill | 7795 | 178541 |
| Cracker Jack Mine | Boulder | Mine | 395715N | 1051257W | Louisville | 5623 | 1685172 |
| Cracker Jack Number Two Mine | Boulder | Mine | 395652N | 1051229W | Louisville | 5705 | 1685173 |
| Crandell Number One Mine | Boulder | Mine | 400009N | 1050122W | Erie | 5213 | 1685251 |
| Crete Mine | Boulder | Mine | 400055N | 1052211W | Boulder | 6821 | 1683819 |
| Croesus Mine | Boulder | Mine | 400150N | 1052357W | Gold Hill | 7772 | 1683442 |
| Cross Mine | Boulder | Mine | 395905N | 1052838W | Tungsten | 8245 | 1685047 |
| Cross Number Four Mine | Boulder | Mine | 395746N | 1053036W | Nederland | 8235 | 1684949 |
| Cross-Missing Link Mine | Boulder | Mine | 395637N | 1053001W | Tungsten | 8579 | 1685048 |
| Crow Number Thirty-six Mine | Boulder | Mine | 395746N | 1053036W | Nederland | 8235 | 1684950 |
| Crown Mine | Boulder | Mine | 395610N | 1051012W | Louisville | 5643 | 1685174 |
| Crownpoint Mine | Boulder | Mine | 395952N | 1052140W | Eldorado Springs | 7034 | 1685119 |
| Crucible Steel Mine | Boulder | Mine | 395945N | 1052942W | Tungsten | 8484 | 1685049 |
| Dale Taylor Lease Quarry | Boulder | Mine | 401331N | 1051603W | Lyons | 5377 | 1683624 |
| David Mine | Boulder | Mine | 400110N | 1052424W | Gold Hill | 7867 | 1683443 |
| David Owen Mine | Boulder | Mine | 400424N | 1053026W | Ward | 9124 | 1683664 |
| Davidson Mine | Boulder | Mine | 395935N | 1050922W | Louisville | 5577 | 1685175 |
| December Mine | Boulder | Mine | 400736N | 1052132W | Lyons | 8120 | 1683625 |
| Degge Clark Mine | Boulder | Mine | 400108N | 1051641W | Boulder | 5354 | 1683820 |
| Delaware Group Mine | Boulder | Mine | 400439N | 1052220W | Boulder | 7598 | 1683821 |
| Des Moines Mine | Boulder | Mine | 400658N | 1052317W | Gold Hill | 6952 | 1683444 |
| Dew Drop Mine | Boulder | Mine | 400200N | 1053152W | Ward | 9485 | 1683665 |
| Dewey Rocky Mountain Quarry | Boulder | Mine | 401331N | 1051603W | Lyons | 5377 | 1763895 |
| Diamond Claim Mine | Boulder | Mine | 395843N | 1052829W | Tungsten | 8350 | 1685105 |
| Diamond Group of Mines | Boulder | Mine | 400706N | 1052949W | Gold Hill | 8845 | 1683652 |
| Diana Mine | Boulder | Mine | 400729N | 1053332W | Ward | 9770 | 1683666 |
| Digiacomo Mine | Boulder | Mine | 395935N | 1050731W | Lafayette | 5367 | 1685223 |
| Dillon Mine | Boulder | Mine | 395817N | 1052920W | Tungsten | 8297 | 1685050 |
| Dime Mine | Boulder | Mine | 400212N | 1052258W | Gold Hill | 7126 | 1683445 |
| Dodge Mine | Boulder | Mine | 400110N | 1052424W | Gold Hill | 7867 | 1683446 |
| Dolly Mine | Boulder | Mine | 400658N | 1052317W | Gold Hill | 6952 | 1683447 |
| Dolly Number One Mine | Boulder | Mine | 400349N | 1052427W | Gold Hill | 8277 | 1683448 |
| Dolly Varden Mine | Boulder | Mine | 400145N | 1052843W | Gold Hill | 8402 | 1683449 |
| Doolittle Mine | Boulder | Mine | 400108N | 1051641W | Boulder | 5354 | 1683822 |
| Dorothy Mine | Boulder | Mine | 400050N | 1052220W | Boulder | 6929 | 1683823 |
| Doss Mine | Boulder | Mine | 400110N | 1052424W | Gold Hill | 7867 | 1683450 |
| Dozer Mine | Boulder | Mine | 395855N | 1052956W | Tungsten | 8222 | 1685051 |
| Dunraven Mine | Boulder | Mine | 395942N | 1052154W | Eldorado Springs | 7218 | 1685120 |
| Durias Mine | Boulder | Mine | 400741N | 1052019W | Lyons | 7342 | 1683824 |
| E.H.P. Lode Mine | Boulder | Mine | 395335N | 1053029W | Nederland | 9068 | 1685008 |
| Eagle Bird Mine | Boulder | Mine | 395848N | 1053357W | Nederland | 10095 | 181095 |
| Eagle Mine | Boulder | Mine | 395720N | 1051323W | Louisville | 5508 | 1685176 |
| Eagle Rock Mine | Boulder | Mine | 400029N | 1052240W | Gold Hill | 6919 | 1683452 |
| Earl Mine | Boulder | Mine | 400705N | 1052117W | Boulder | 7283 | 1683825 |
| Early Spring Mine | Boulder | Mine | 395903N | 1052718W | Tungsten | 8166 | 1685052 |
| East Boston Mine | Boulder | Mine | 400108N | 1051641W | Boulder | 5354 | 1683826 |
| East Saint Louis Mine | Boulder | Mine | 395849N | 1063353W | Radium | 7818 | 181094 |
| Eclipse Mine | Boulder | Mine | 395851N | 1052212W | Eldorado Springs | 7835 | 1685121 |
| Eldorado Mine | Boulder | Mine | 395500N | 1051624W | Eldorado Springs | 6378 | 1685111 |
| Eldorado Mine | Boulder | Mine | 395659N | 1051100W | Louisville | 5617 | 1685177 |
| Eldorado Quarry | Boulder | Mine | 400424N | 1053026W | Ward | 9124 | 1735823 |
| Electric Mine | Boulder | Mine | 395935N | 1050712W | Lafayette | 5344 | 1685224 |
| Elkhorn Prospect | Boulder | Mine | 400635N | 1051923W | Boulder | 6316 | 1683925 |
| Ella C Mine | Boulder | Mine | 400108N | 1051641W | Boulder | 5354 | 1683827 |
| Ellen Mine | Boulder | Mine | 400845N | 1052131W | Lyons | 8018 | 1683828 |
| Elsie Mine | Boulder | Mine | 395631N | 1052918W | Tungsten | 8432 | 181141 |
| Emancipation Mine | Boulder | Mine | 400314N | 1052203W | Boulder | 6952 | 1683829 |
| Emely Mine | Boulder | Mine | 400658N | 1052317W | Gold Hill | 6952 | 1683453 |
| Emerson Mine | Boulder | Mine | 400232N | 1052418W | Gold Hill | 7539 | 1683454 |
| Emmet Mine | Boulder | Mine | 400658N | 1052317W | Gold Hill | 6952 | 1683455 |
| Emmit Mine | Boulder | Mine | 400735N | 1052400W | Raymond | 7352 | 178252 |
| Empress Mine | Boulder | Mine | 400010N | 1052303W | Gold Hill | 6683 | 1683456 |
| Enterprise Mine | Boulder | Mine | 395641N | 1053431W | Nederland | 9419 | 181067 |
| Equator Mine | Boulder | Mine | 400658N | 1052317W | Gold Hill | 6952 | 1683457 |
| Erie Pit | Boulder | Mine | 400303N | 1050303W | Erie | 5023 | 1683945 |
| Escanoba Mine | Boulder | Mine | 400658N | 1052317W | Gold Hill | 6952 | 1683406 |
| Eskimo Mine | Boulder | Mine | 395919N | 1052231W | Eldorado Springs | 7208 | 1685122 |
| Essco Mine | Boulder | Mine | 400108N | 1051641W | Boulder | 5354 | 1683830 |
| Eureka Alta Mine | Boulder | Mine | 400110N | 1052424W | Gold Hill | 7867 | 1683458 |
| Eureka Mine | Boulder | Mine | 400007N | 1052448W | Gold Hill | 7129 | 178580 |
| Eureka Mine | Boulder | Mine | 400740N | 1052101W | Lyons | 7920 | 1683831 |
| Evans Mine | Boulder | Mine | 400318N | 1052347W | Gold Hill | 7529 | 178524 |
| Evening Star Mine | Boulder | Mine | 400211N | 1052242W | Gold Hill | 7274 | 1683459 |
| Excelsior Mine | Boulder | Mine | 400025N | 1050502W | Erie | 5220 | 1683946 |
| F G Watrous Tungsten Prospect | Boulder | Mine | 400024N | 1052513W | Gold Hill | 7703 | 1683782 |
| Fair Day Mine | Boulder | Mine | 400641N | 1052523W | Gold Hill | 7844 | 1683460 |
| Fair Day Mine | Boulder | Mine | 400713N | 1052936W | Gold Hill | 8881 | 1683600 |
| Fair One Mine | Boulder | Mine | 400118N | 1052726W | Gold Hill | 8517 | 1683783 |
| Fairfax Mine | Boulder | Mine | 400336N | 1052245W | Gold Hill | 7251 | 1683461 |
| Fairheaven Mine | Boulder | Mine | 395513N | 1053219W | Nederland | 9419 | 1685009 |
| Fairmount Mine | Boulder | Mine | 400110N | 1052424W | Gold Hill | 7867 | 1683462 |
| Farmer Boy Mine | Boulder | Mine | 400658N | 1052317W | Gold Hill | 6952 | 1683463 |
| First National Bank Mine | Boulder | Mine | 400328N | 1052403W | Gold Hill | 7966 | 1683464 |
| Fisk Mine | Boulder | Mine | 400349N | 1052427W | Gold Hill | 8277 | 1683465 |
| Fitzgerald Mine | Boulder | Mine | 395640N | 1052915W | Tungsten | 8688 | 1685053 |
| Fitzsimons Number One Mine | Boulder | Mine | 395746N | 1053036W | Nederland | 8235 | 1684951 |
| Five Brothers Mine | Boulder | Mine | 400227N | 1052138W | Boulder | 6401 | 1683832 |
| Flatiron Sand and Gravel Pit | Boulder | Mine | 400100N | 1051413W | Niwot | 5230 | 1683929 |
| Floyd Mine | Boulder | Mine | 400006N | 1052255W | Gold Hill | 6493 | 1683466 |
| Fools Paradise Number One Mine | Boulder | Mine | 400210N | 1053048W | Ward | 9045 | 1683667 |
| Fools Paradise Number Two Mine | Boulder | Mine | 400210N | 1053048W | Ward | 9045 | 1683668 |
| Ford Mine | Boulder | Mine | 395746N | 1053036W | Nederland | 8235 | 1684952 |
| Forest Home Mine | Boulder | Mine | 395847N | 1052916W | Tungsten | 8524 | 1685054 |
| Forest Mine | Boulder | Mine | 400221N | 1052432W | Gold Hill | 7237 | 1683467 |
| Fortune Mine | Boulder | Mine | 395935N | 1052204W | Eldorado Springs | 7365 | 1685123 |
| Fourth of July Mine | Boulder | Mine | 400040N | 1053934W | Monarch Lake | 11260 | 178459 |
| Fourth of July Mine | Boulder | Mine | 400940N | 1052412W | Raymond | 7369 | 1683607 |
| Fox Hills Outcrop | Boulder | Mine | 400229N | 1051927W | Boulder | 6916 | 1683797 |
| Fox Mine | Boulder | Mine | 395745N | 1051242W | Louisville | 5650 | 1685178 |
| Fraction Mine | Boulder | Mine | 400215N | 1052357W | Gold Hill | 6959 | 1683468 |
| Franklin Mine | Boulder | Mine | 400223N | 1052415W | Gold Hill | 7185 | 178513 |
| Franklin Number Five Mine | Boulder | Mine | 400224N | 1052324W | Gold Hill | 6860 | 1683469 |
| Free Courage Mine | Boulder | Mine | 400145N | 1052814W | Gold Hill | 8294 | 1683470 |
| Frontier Pit | Boulder | Mine | 401116N | 1051041W | Hygiene | 5089 | 1683636 |
| G and S Mine | Boulder | Mine | 400108N | 1051641W | Boulder | 5354 | 1683833 |
| Gale Mine | Boulder | Mine | 395852N | 1052953W | Tungsten | 8271 | 1685055 |
| Garfield Mine | Boulder | Mine | 400200N | 1050402W | Erie | 5154 | 1683947 |
| Garfield Number Two Mine | Boulder | Mine | 400221N | 1050311W | Erie | 5059 | 1683972 |
| Gem Mine | Boulder | Mine | 395854N | 1052910W | Tungsten | 8422 | 1685056 |
| Genghis Khan Mine | Boulder | Mine | 400108N | 1051641W | Boulder | 5354 | 1683815 |
| George Henry Mine | Boulder | Mine | 400349N | 1052427W | Gold Hill | 8277 | 1683471 |
| Gilard Mine | Boulder | Mine | 400108N | 1051641W | Boulder | 5354 | 1683834 |
| Gillespie and Big John Mine | Boulder | Mine | 400350N | 1052302W | Gold Hill | 7805 | 1683472 |
| Gina Number One Mine | Boulder | Mine | 400349N | 1052427W | Gold Hill | 8277 | 1683473 |
| Gina Number Two Mine | Boulder | Mine | 400349N | 1052427W | Gold Hill | 8277 | 1683474 |
| Gladiator Mine | Boulder | Mine | 400632N | 1052130W | Boulder | 6706 | 1683835 |
| Gladstone Mine | Boulder | Mine | 400020N | 1050532W | Erie | 5246 | 1683948 |
| Gladys Mine | Boulder | Mine | 400212N | 1052313W | Gold Hill | 7323 | 1683475 |
| Glen Clover Mine | Boulder | Mine | 400424N | 1053026W | Ward | 9124 | 1683669 |
| Gold Coin Mine | Boulder | Mine | 400055N | 1052218W | Boulder | 6919 | 1683836 |
| Gold Cross Mine | Boulder | Mine | 400806N | 1052308W | Raymond | 7956 | 1683608 |
| Gold Farm Mine | Boulder | Mine | 395927N | 1052408W | Tungsten | 8104 | 1685124 |
| Gold Hill Beryl Claims | Boulder | Mine | 400448N | 1051525W | Boulder | 5266 | 1683915 |
| Gold King Mine | Boulder | Mine | 395600N | 1050652W | Lafayette | 5341 | 1685225 |
| Gold Lake Mine | Boulder | Mine | 400425N | 1052406W | Gold Hill | 7549 | 1683411 |
| Gold Lake Property Mine | Boulder | Mine | 400534N | 1052622W | Gold Hill | 8563 | 1683785 |
| Gold Leaf Lode | Boulder | Mine | 400658N | 1052317W | Gold Hill | 6952 | 1683409 |
| Gold Ring Mine | Boulder | Mine | 400401N | 1052426W | Gold Hill | 8064 | 1683476 |
| Golden Age Mine | Boulder | Mine | 400734N | 1052135W | Lyons | 8146 | 1683626 |
| Golden Belle Mine | Boulder | Mine | 400622N | 1052445W | Gold Hill | 8153 | 1683477 |
| Golden Chest | Boulder | Mine | 400658N | 1052317W | Gold Hill | 6952 | 1683480 |
| Golden Chest Mine | Boulder | Mine | 400137N | 1052810W | Gold Hill | 8487 | 1683478 |
| Golden Crown Group Mine | Boulder | Mine | 400150N | 1052231W | Boulder | 7346 | 1683837 |
| Golden Eagle Mine | Boulder | Mine | 395945N | 1052137W | Eldorado Springs | 6900 | 1685125 |
| Golden Glow Mine | Boulder | Mine | 395957N | 1052155W | Eldorado Springs | 6808 | 1685126 |
| Golden Queen Mine | Boulder | Mine | 400440N | 1052952W | Gold Hill | 9081 | 1683670 |
| Golden Reward Mine | Boulder | Mine | 395746N | 1053036W | Nederland | 8235 | 1684953 |
| Goldfinch Mine | Boulder | Mine | 400806N | 1052333W | Raymond | 7854 | 1683609 |
| Goldsmith Maid Mine | Boulder | Mine | 400441N | 1052405W | Gold Hill | 7880 | 1683412 |
| Good Friday Mine | Boulder | Mine | 400024N | 1052411W | Gold Hill | 7415 | 178583 |
| Good Hope Mine | Boulder | Mine | 400356N | 1052200W | Boulder | 7109 | 1683838 |
| Gorham Mine | Boulder | Mine | 395705N | 1051222W | Louisville | 5650 | 1685179 |
| Governor Group Mine | Boulder | Mine | 400507N | 1052402W | Gold Hill | 8645 | 1683682 |
| Grace Mine | Boulder | Mine | 400227N | 1052138W | Boulder | 6401 | 1683839 |
| Grand Central Mine | Boulder | Mine | 400710N | 1052118W | Boulder | 7467 | 1683840 |
| Grand Island Mining District Mine | Boulder | Mine | 395655N | 1053517W | Nederland | 9081 | 1684954 |
| Grand Republic Mine | Boulder | Mine | 400203N | 1052239W | Gold Hill | 7050 | 178598 |
| Grand Union Mine | Boulder | Mine | 400707N | 1052125W | Boulder | 7424 | 1683841 |
| Grand View Mine | Boulder | Mine | 400343N | 1052219W | Boulder | 7474 | 1683842 |
| Grant County Mine | Boulder | Mine | 395935N | 1053436W | Nederland | 10003 | 1684955 |
| Grant Mine | Boulder | Mine | 400313N | 1052341W | Gold Hill | 7736 | 178521 |
| Grant Mine | Boulder | Mine | 395935N | 1050352W | Lafayette | 5121 | 1685226 |
| Grant Number Eleven Mine | Boulder | Mine | 395521N | 1053409W | Nederland | 9760 | 1685014 |
| Graphic Mine | Boulder | Mine | 395951N | 1052143W | Eldorado Springs | 7100 | 1685127 |
| Great Britain Mine | Boulder | Mine | 400245N | 1052403W | Gold Hill | 7726 | 178516 |
| Great Northern Mine | Boulder | Mine | 395919N | 1053440W | Nederland | 9852 | 181103 |
| Great Western Mine | Boulder | Mine | 400424N | 1053026W | Ward | 9124 | 1683671 |
| Green Spar Mine | Boulder | Mine | 400658N | 1052317W | Gold Hill | 6952 | 1683683 |
| Green Thumb Mine | Boulder | Mine | 395935N | 1053436W | Nederland | 10003 | 1684957 |
| Greenhorn Mine | Boulder | Mine | 395833N | 1053057W | Nederland | 8514 | 1684956 |
| Grey Copper Mine | Boulder | Mine | 400231N | 1052402W | Gold Hill | 7523 | 178514 |
| Grey Eagle Mine | Boulder | Mine | 400504N | 1052328W | Gold Hill | 8254 | 1683843 |
| Greyback Mine | Boulder | Mine | 395845N | 1053132W | Nederland | 8665 | 1684958 |
| Grouse Mine | Boulder | Mine | 400511N | 1052410W | Gold Hill | 8642 | 1683684 |
| Gunbarrel Mine | Boulder | Mine | 400108N | 1051641W | Boulder | 5354 | 1683844 |
| Hallie A Tungsten Mine | Boulder | Mine | 400110N | 1053042W | Ward | 9045 | 1683672 |
| Hammons Quarry | Boulder | Mine | 401331N | 1051603W | Lyons | 5377 | 1763896 |
| Harms Mine | Boulder | Mine | 400424N | 1053026W | Ward | 9124 | 1683673 |
| Hawkeye Mine | Boulder | Mine | 400349N | 1052427W | Gold Hill | 8277 | 1683685 |
| Hayward Mine | Boulder | Mine | 400008N | 1050331W | Erie | 5095 | 178742 |
| Haywood Mine | Boulder | Mine | 400020N | 1050902W | Niwot | 5354 | 1683949 |
| Hecla Mine | Boulder | Mine | 395935N | 1050731W | Lafayette | 5367 | 1685227 |
| Heil Brothers Quarry | Boulder | Mine | 400108N | 1051641W | Boulder | 5354 | 1683845 |
| Heil Quarry | Boulder | Mine | 400907N | 1051819W | Lyons | 6384 | 1683627 |
| Helen B Mine | Boulder | Mine | 400424N | 1053026W | Ward | 9124 | 1683674 |
| Helena Mine | Boulder | Mine | 400421N | 1052333W | Gold Hill | 7992 | 1683686 |
| Helmer Brothers Pit | Boulder | Mine | 401221N | 1050023W | Longmont | 4997 | 1683647 |
| Henna Mine | Boulder | Mine | 400349N | 1052427W | Gold Hill | 8277 | 1683687 |
| Henry Number One Mine | Boulder | Mine | 400219N | 1052405W | Gold Hill | 7142 | 1683688 |
| Henry Number Two Mine | Boulder | Mine | 400219N | 1052405W | Gold Hill | 7142 | 1683689 |
| Herald Mine | Boulder | Mine | 400042N | 1052519W | Gold Hill | 7726 | 178593 |
| Hercules Mine | Boulder | Mine | 400813N | 1052226W | Lyons | 7641 | 1683628 |
| Hereafter Mine | Boulder | Mine | 395928N | 1052202W | Eldorado Springs | 7241 | 1685128 |
| Herold Mine | Boulder | Mine | 400038N | 1052240W | Gold Hill | 7349 | 1683690 |
| Hidden Treasure Mine | Boulder | Mine | 400430N | 1052142W | Boulder | 7293 | 1683846 |
| Hideaway Number One Mine | Boulder | Mine | 400110N | 1052424W | Gold Hill | 7867 | 1683691 |
| High Grade Mine | Boulder | Mine | 400110N | 1052424W | Gold Hill | 7867 | 1683692 |
| High Line Mine | Boulder | Mine | 400349N | 1052427W | Gold Hill | 8277 | 1683693 |
| High View Mine | Boulder | Mine | 395700N | 1051357W | Louisville | 5584 | 1685180 |
| Highline Prospect | Boulder | Mine | 400638N | 1051953W | Boulder | 6499 | 1683924 |
| Highway Mine | Boulder | Mine | 395705N | 1050457W | Lafayette | 5308 | 1685229 |
| Hillside Mine | Boulder | Mine | 400110N | 1052424W | Gold Hill | 7867 | 1683694 |
| Hi-way Mine | Boulder | Mine | 395800N | 1050432W | Lafayette | 5239 | 1685228 |
| Hollifield and Prime Mine | Boulder | Mine | 395746N | 1053036W | Nederland | 8235 | 1684959 |
| Home Sweet Home Mine | Boulder | Mine | 400301N | 1052200W | Boulder | 6650 | 1683847 |
| Homestake Mine | Boulder | Mine | 395918N | 1052308W | Tungsten | 7520 | 1685057 |
| Hoodoo Mine | Boulder | Mine | 400349N | 1052427W | Gold Hill | 8277 | 1683696 |
| Hoosier Extension Mine | Boulder | Mine | 395746N | 1053036W | Nederland | 8235 | 1684960 |
| Hoosier Mine | Boulder | Mine | 395837N | 1052955W | Tungsten | 8438 | 1685058 |
| Hopewell and Rusty Mine | Boulder | Mine | 400818N | 1052606W | Raymond | 8422 | 1683620 |
| Horseshoe Comstock Holland Roxbury Mine | Boulder | Mine | 400025N | 1052304W | Gold Hill | 6788 | 1683786 |
| Horseshoe Workings Mine | Boulder | Mine | 400400N | 1052932W | Gold Hill | 9025 | 1683790 |
| Horsfal Mine | Boulder | Mine | 400403N | 1052348W | Gold Hill | 8382 | 1683697 |
| Hugo Ranch Mine | Boulder | Mine | 395929N | 1052851W | Tungsten | 8081 | 1685059 |
| Humbug Mine | Boulder | Mine | 395937N | 1052220W | Eldorado Springs | 7093 | 1685129 |
| Hummer Mine | Boulder | Mine | 395839N | 1052958W | Tungsten | 8432 | 1685060 |
| Hurricane Mine | Boulder | Mine | 395746N | 1053036W | Nederland | 8235 | 1684961 |
| Hygiene Pit | Boulder | Mine | 401119N | 1051140W | Hygiene | 5108 | 1683641 |
| Idaho Tunnel | Boulder | Mine | 395849N | 1053417W | Nederland | 9780 | 181098 |
| Ideal Number Two Mine | Boulder | Mine | 400424N | 1053026W | Ward | 9124 | 1683675 |
| Illinois Mine | Boulder | Mine | 395819N | 1053134W | Nederland | 8619 | 181107 |
| Imperial Mine | Boulder | Mine | 395900N | 1050722W | Lafayette | 5315 | 1685230 |
| India Mine | Boulder | Mine | 400108N | 1051641W | Boulder | 5354 | 1683848 |
| Industrial Mine | Boulder | Mine | 395630N | 1051017W | Louisville | 5722 | 1685181 |
| Ingersoll Mine | Boulder | Mine | 400658N | 1052317W | Gold Hill | 6952 | 1683698 |
| Ingram Mine | Boulder | Mine | 400336N | 1052244W | Gold Hill | 7283 | 1683699 |
| Interocean Mine | Boulder | Mine | 400347N | 1052203W | Boulder | 7228 | 1683849 |
| Interocean Mine | Boulder | Mine | 395928N | 1052207W | Eldorado Springs | 7247 | 1685130 |
| Invincible Mine | Boulder | Mine | 400727N | 1052338W | Gold Hill | 7398 | 1683599 |
| Iron Dike Mine | Boulder | Mine | 395938N | 1052154W | Eldorado Springs | 7165 | 1685155 |
| Iron King Tunnel Mine | Boulder | Mine | 400231N | 1052102W | Boulder | 6447 | 1683850 |
| Italian Mine | Boulder | Mine | 395800N | 1050702W | Lafayette | 5321 | 1685231 |
| J Albine Mine | Boulder | Mine | 400057N | 1052629W | Gold Hill | 8182 | 1683700 |
| J O Lode Mine | Boulder | Mine | 400108N | 1051641W | Boulder | 5354 | 1683853 |
| Jack and Summit Mine | Boulder | Mine | 395746N | 1053036W | Nederland | 8235 | 1684962 |
| Jackpot Mine | Boulder | Mine | 395841N | 1053342W | Nederland | 9833 | 181093 |
| Jackson Mine | Boulder | Mine | 400500N | 1050342W | Erie | 4964 | 1735426 |
| Jake Witter Mine | Boulder | Mine | 400227N | 1052138W | Boulder | 6401 | 1683851 |
| Japanese Mine | Boulder | Mine | 395858N | 1052906W | Tungsten | 8415 | 1685061 |
| Jay Bird Mine | Boulder | Mine | 395914N | 1052243W | Tungsten | 7595 | 1685062 |
| Jenkins Mine | Boulder | Mine | 395716N | 1051005W | Louisville | 5502 | 1685182 |
| Jenkins Pit | Boulder | Mine | 400108N | 1051641W | Boulder | 5354 | 1683852 |
| Jimtown Mining Company Mine | Boulder | Mine | 400658N | 1052317W | Gold Hill | 6952 | 1683701 |
| John Jay Mine | Boulder | Mine | 400625N | 1052556W | Gold Hill | 8277 | 1683702 |
| John W Fitts Lease Mine | Boulder | Mine | 400158N | 1052420W | Gold Hill | 7808 | 1683695 |
| Johnson Quarry | Boulder | Mine | 401331N | 1051603W | Lyons | 5377 | 1763897 |
| Jumbo Mine | Boulder | Mine | 400658N | 1052317W | Gold Hill | 6952 | 1683703 |
| Junior Shaft Mine | Boulder | Mine | 395829N | 1053140W | Nederland | 8655 | 1683921 |
| Kansas City Mine | Boulder | Mine | 395941N | 1052211W | Eldorado Springs | 7336 | 1685131 |
| Katie Mine | Boulder | Mine | 400100N | 1052212W | Boulder | 6857 | 1683854 |
| Kekionga Mine | Boulder | Mine | 395909N | 1052303W | Tungsten | 7982 | 181159 |
| Keystone Mine | Boulder | Mine | 395921N | 1052202W | Eldorado Springs | 7109 | 1685132 |
| Kicker Mine | Boulder | Mine | 395746N | 1053036W | Nederland | 8235 | 1684963 |
| King Group Mine | Boulder | Mine | 400349N | 1052427W | Gold Hill | 8277 | 1683704 |
| King Mountain Quarry | Boulder | Mine | 401331N | 1051603W | Lyons | 5377 | 1763898 |
| King Wilhelm Mine | Boulder | Mine | 400642N | 1052057W | Boulder | 6972 | 1683855 |
| Kingston Mine | Boulder | Mine | 395959N | 1052236W | Tungsten | 6621 | 1685063 |
| Kline Quarry | Boulder | Mine | 401331N | 1051603W | Lyons | 5377 | 1763899 |
| Klondike Mine | Boulder | Mine | 400412N | 1052402W | Gold Hill | 8123 | 1683856 |
| Lady Bug Mine | Boulder | Mine | 400708N | 1052200W | Boulder | 7815 | 1683798 |
| Lady Franklin Mine | Boulder | Mine | 395940N | 1052154W | Eldorado Springs | 7214 | 1685133 |
| Lake Mine | Boulder | Mine | 395746N | 1053036W | Nederland | 8235 | 1684964 |
| Lands End Mine | Boulder | Mine | 400349N | 1052427W | Gold Hill | 8277 | 1683705 |
| Last Chance Mine | Boulder | Mine | 395830N | 1052959W | Tungsten | 8471 | 1685064 |
| Lawrence Mine | Boulder | Mine | 400001N | 1052254W | Gold Hill | 6650 | 1683706 |
| Leader Mine | Boulder | Mine | 395815N | 1050812W | Louisville | 5358 | 1685183 |
| Left Hand Peat Company Mine | Boulder | Mine | 400424N | 1053026W | Ward | 9124 | 1683676 |
| Lehigh Mine | Boulder | Mine | 400200N | 1050252W | Erie | 5056 | 1683950 |
| Leo the Lion Lode Number One Mine | Boulder | Mine | 400631N | 1051943W | Boulder | 6558 | 1683857 |
| Lewis Lode Mine | Boulder | Mine | 395745N | 1051247W | Louisville | 5584 | 1685159 |
| Lily Mine | Boulder | Mine | 400657N | 1052135W | Boulder | 7093 | 1683858 |
| Lily Mine | Boulder | Mine | 395855N | 1052956W | Tungsten | 8222 | 1685065 |
| Lister Mine | Boulder | Mine | 400200N | 1050402W | Erie | 5154 | 1683951 |
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