Mines in Boulder County, Colorado
1,175Total
134Active
Boulder County, Colorado has 1,175 mine and mineral deposit locations documented in federal records from the USGS and MSHA. 134 of these are currently active mining operations. The most commonly recorded commodity is gold, with 536 sites. The table below lists all recorded mines in the county with links to individual site details.
All Mines in Boulder County
| Mine | Commodity | Type | Status | Source |
|---|---|---|---|---|
| Lyons Cement Plant Cemex Inc | Cement | Facility | Active | MSHA |
| Alice Mine | Lead, Silver, Gold, Copper, Fluorine-Fluorite | Producer | MRDS | |
| Andesite Rock Quarry | Stone, Crushed/Broken | Surface | Producer | MRDS |
| Arapahoe Pit | Sand and Gravel, Construction | Surface | Producer | MRDS |
| Argo | Uranium, Fluorine-Fluorite, Gold, Silver, Lead, Copper | Producer | MRDS | |
| Barker No. 3 | Tungsten | Producer | MRDS | |
| Belcher Mine | Silver | Producer | MRDS | |
| Beryl #2 | Niobium (Columbium), Feldspar, Beryllium, Mica | Producer | MRDS | |
| Beryl Lode | Beryllium, Feldspar, Mica | Producer | MRDS | |
| Big 5 | Gold | Underground | Producer | MRDS |
| Blue Jay | Fluorine-Fluorite, Uranium | Producer | MRDS | |
| Boulder Brick & Tile Co. | Clay | Producer | MRDS | |
| Boulder Pit No.485 | Sand and Gravel, Construction | Surface | Producer | MRDS |
| Brannan Sand and Gravel Co | Sand and Gravel, Construction | Surface | Producer | MRDS |
| Brown Spar | Fluorine-Fluorite, Uranium | Producer | MRDS | |
| Buckhorn | Gold, Silver, Lead | Producer | MRDS | |
| Burlington | Uranium, Fluorine-Fluorite | Producer | MRDS | |
| Burlington | Fluorine-Fluorite | Underground | Producer | MRDS |
| California | Gold | Underground | Producer | MRDS |
| Carabou Mine | Vanadium | Producer | MRDS | |
| Cash | Gold | Producer | MRDS | |
| Chavez Mine | Tungsten | Surface | Producer | MRDS |
| Colorado Brick | Clay | Surface | Producer | MRDS |
| Columbia & Spencer Mines | Silver | Producer | MRDS | |
| Columbine | Feldspar, Mica, Beryllium, Niobium (Columbium), Copper | Producer | MRDS | |
| Consolation Mine | Fluorine-Fluorite | Producer | MRDS | |
| Copper Glance | Gold, Copper | Producer | MRDS | |
| Crucible Steel | Tungsten | Surface | Producer | MRDS |
| Dale Taylor Lease Loukon | Stone, Crushed/Broken | Surface | Producer | MRDS |
| Dolly Varden | Gold | Producer | MRDS | |
| Eagle Rock | Tungsten | Surface | Producer | MRDS |
| Eldorado | Clay | Surface | Producer | MRDS |
| Electronic | Silver, Gold | Producer | MRDS | |
| Emmet | Gold, Fluorine-Fluorite, Uranium | Producer | MRDS | |
| Fairday | Uranium | Producer | MRDS | |
| Fairday Mine | Uranium, Lead, Silver, Fluorine-Fluorite | Producer | MRDS | |
| Fallow Tunnel | Silver, Gold | Producer | MRDS | |
| Flatiron Sand and Gravel | Sand and Gravel, Construction | Surface | Producer | MRDS |
| Free Coinage | Gold, Silver | Producer | MRDS | |
| Frontier Pit and Plant | Sand and Gravel, Construction | Surface | Producer | MRDS |
| Gold Leaf Claim & Lulu B. Claim | Uranium | Producer | MRDS | |
| Grand Central - Big Blossom | Gold | Producer | MRDS | |
| Heil Brothers Quarry | Sand and Gravel, Construction | Underground | Producer | MRDS |
| Home Run | Tungsten | Producer | MRDS | |
| Hygiene Pit | Sand and Gravel, Construction | Surface | Producer | MRDS |
| Idaho Mine | Gold, Silver | Producer | MRDS | |
| Ingram Mine | Gold, Silver | Producer | MRDS | |
| Irene | Tungsten | Producer | MRDS | |
| Isabel Mine | Silver | Producer | MRDS | |
| Jenkins | Sand and Gravel, Construction | Surface | Producer | MRDS |
| Jenkins Pit | Clay | Surface | Producer | MRDS |
| John Jay | Gold | Underground | Producer | MRDS |
| John Jay Mine | Gold, Silver | Producer | MRDS | |
| John W Fittslease Brodie | Stone, Crushed/Broken | Underground | Producer | MRDS |
| Kekionga-Magnolia Vein | Gold, Tungsten | Producer | MRDS | |
| Lady Franklin Mine | Gold | Producer | MRDS | |
| Last Chance No. 1 | Tungsten | Producer | MRDS | |
| Lease Tailings Pond | Uranium | Producer | MRDS | |
| Little Bennie | Beryllium, Feldspar, Mica | Producer | MRDS | |
| Little Ruby | Silver, Gold | Producer | MRDS | |
| Logan Mine | Gold, Silver, Tungsten, Zinc, Lead | Producer | MRDS | |
| Longfellow | Gold, Silver, Copper | Producer | MRDS | |
| Longmont Brick & Tile Co. | Clay | Producer | MRDS | |
| Longmont Plant | Sand and Gravel, Construction | Surface | Producer | MRDS |
| Longmont Plant | Clay | Processing Plant | Producer | MRDS |
| Loukonen Bros Silica Mine | Silica | Surface | Producer | MRDS |
| Lucky Strike, Last Nickel | Tungsten, Lead, Zinc | Producer | MRDS | |
| Lulu B. & Victory Claims | Uranium | Producer | MRDS | |
| Lyons | Stone, Crushed/Broken | Surface | Producer | MRDS |
| Marion Mill | Tin | Processing Plant | Producer | MRDS |
| Marlatt | Sand and Gravel, Construction | Surface | Producer | MRDS |
| Marnette | Sand and Gravel, Construction | Surface | Producer | MRDS |
| Marshal Or Langford Surface Iron | Iron | Producer | MRDS | |
| Marshall Clay Pit | Clay | Surface | Producer | MRDS |
| Martin Marietta Limestone Quarry | Stone, Crushed/Broken | Surface | Producer | MRDS |
| Martin-Marietta Cement Plant | Stone, Crushed/Broken | Processing Plant | Producer | MRDS |
| McCann Clay Mine | Clay | Surface | Producer | MRDS |
| Melvina | Gold | Producer | MRDS | |
| Miller Group | Uranium | Producer | MRDS | |
| Mogul Tunnel | Copper | Underground | Producer | MRDS |
| Mona No 9 Claim | Beryllium, Mica, Tantalum | Producer | MRDS | |
| Monday Lode | Tungsten | Producer | MRDS | |
| Mountain Goat | Uranium | Producer | MRDS | |
| Mountain Lion-Keystone Vein | Gold | Producer | MRDS | |
| Native Silver Mine | Silver | Producer | MRDS | |
| Nelson | Gold, Silver | Producer | MRDS | |
| New Girl Prospect | Niobium (Columbium), Tantalum, Beryllium | Producer | MRDS | |
| No Name Mine | Lead, Zinc, Silver | Producer | MRDS | |
| Nugget Group | Silver, Lead, Gold | Producer | MRDS | |
| Philadelphia | Tungsten | Underground | Producer | MRDS |
| Poorman Mine | Gold, Silver | Underground | Producer | MRDS |
| Poorman Mine | Silver | Producer | MRDS | |
| Puzzle | Feldspar | Producer | MRDS | |
| Quaker City, Ophir, Pennsylvania, Peewink | Tungsten, Gold | Producer | MRDS | |
| Rock Pit | Stone, Crushed/Broken | Surface | Producer | MRDS |
| Rocky Mountain | Tungsten | Underground | Producer | MRDS |
| Rogers No 11 | Tungsten | Underground | Producer | MRDS |
| Rusty Gold and Cerite | REE | Producer | MRDS | |
| Senator Hill and Ophir Veins | Gold | Producer | MRDS | |
| Seven-Thirty Mine | Silver | Producer | MRDS | |
| Sherman | Silver | Producer | MRDS | |
| Shields | Gold, Silver | Producer | MRDS | |
| Shirley Lode | Gold, Silver | Producer | MRDS | |
| Silica Quarry | Silica | Surface | Producer | MRDS |
| Silver Dollar | Silver | Producer | MRDS | |
| Sisk | Uranium | Producer | MRDS | |
| Slide Mine | Gold | Producer | MRDS | |
| Snowy Range Mine | Lead, Gold | Producer | MRDS | |
| South Flat Pit | Sand and Gravel, Construction | Surface | Producer | MRDS |
| Spicer | Sand and Gravel, Construction | Surface | Producer | MRDS |
| Sprague Red | Sand and Gravel, Construction | Underground | Producer | MRDS |
| Sunnyside | Tungsten | Producer | MRDS | |
| Sunshine Clay Mines | Fire Clay (Refractory) | Producer | MRDS | |
| Table Mesa Pit | Sand and Gravel, Construction | Surface | Producer | MRDS |
| Unknown | Zinc, Lead | Producer | MRDS | |
| Unknown | Lead, Zinc, Silver | Producer | MRDS | |
| Unknown | Gold | Producer | MRDS | |
| Unknown | Fire Clay (Refractory) | Producer | MRDS | |
| Unknown | Gold | Producer | MRDS | |
| Unknown | Mica | Producer | MRDS | |
| Up To Date Mine | Silver | Producer | MRDS | |
| Vasco No. 2 & 5 | Tungsten | Producer | MRDS | |
| Victory Group | Uranium | Producer | MRDS | |
| Victory Lode Claim | Uranium, Fluorine-Fluorite | Producer | MRDS | |
| Virginia, Golden Key | Gold | Producer | MRDS | |
| Weng Pit | Sand and Gravel, Construction | Surface | Producer | MRDS |
| White Raven | Silver, Lead, Gold | Producer | MRDS | |
| Wigwam | Silver, Lead, Zinc | Producer | MRDS | |
| Wild Dutchman | Gold, Silver | Producer | MRDS | |
| Wisconsin | Tungsten | Producer | MRDS | |
| Wood Mountain Group | Gold | Underground | Producer | MRDS |
| World Mine | Tungsten | Producer | MRDS | |
| Yellow Girl | Fluorine-Fluorite | Producer | MRDS | |
| Yellow Pine | Gold, Silver, Lead | Producer | MRDS | |
| 1905 Mine | Tungsten | Underground | Past Producer | MRDS |
| Afterthought | Fluorine-Fluorite | Underground | Past Producer | MRDS |
| Alahambra | Gold | Underground | Past Producer | MRDS |
| Alamakee | Gold | Underground | Past Producer | MRDS |
| Alaska Group | Gold | Occurrence | MRDS | |
| Alaska Tunnel | Gold | Underground | Past Producer | MRDS |
| Albion, Comanche, Maine, Washington, Penobscot, Monarch | Gold | Occurrence | MRDS | |
| Alcyone | Gold | Underground | Past Producer | MRDS |
| Alice Open Pit | Lead, Silver, Gold, Copper, Fluorine-Fluorite | Surface | Past Producer | MRDS |
| All American, Durias, Gray Copper | Gold | Occurrence | MRDS | |
| Allied Gold Mining Company | Gold | Underground | Past Producer | MRDS |
| Alpine Horn | Gold | Underground | Past Producer | MRDS |
| Alton Tunnel | Silver, Gold | Occurrence | MRDS | |
| Alton Tunnel | Gold | Underground | Past Producer | MRDS |
| Alturas | Gold | Underground | Past Producer | MRDS |
| Amalban Thief | Gold | Underground | Past Producer | MRDS |
| American | Gold | Underground | Past Producer | MRDS |
| American Eagle-Interocean | Gold | Occurrence | MRDS | |
| Amy Paul | Gold | Underground | Past Producer | MRDS |
| Amzy, Great Sphinx | Tungsten | Underground | Occurrence | MRDS |
| Anchor | Gold | Underground | Past Producer | MRDS |
| Anna C. Mine | Tungsten | Underground | Past Producer | MRDS |
| Anna Nos. 1 and 2 | Tungsten | Past Producer | MRDS | |
| Arapahoe Group of Claims | Gold | Prospect | MRDS | |
| Archer | Gold | Underground | Past Producer | MRDS |
| Argo | Fluorine-Fluorite | Underground | Past Producer | MRDS |
| Arrow 1,2,3 | Tungsten | Occurrence | MRDS | |
| Arrowhead | Gold | Underground | Past Producer | MRDS |
| Atchison Mine | Gold | Occurrence | MRDS | |
| Atchison and Eldorado | Gold | Underground | Past Producer | MRDS |
| Atlanta | Gold | Underground | Past Producer | MRDS |
| Atlantic | Gold | Underground | Past Producer | MRDS |
| Atlantic, Milwaukee, Emma Daniels, Pennsylvania Gr, Black Diamond | Gold | Occurrence | MRDS | |
| Audophone | Gold | Underground | Past Producer | MRDS |
| Avalon Placer, Onondaga, Syracuse, Silver Str. | Gold, Silver | Occurrence | MRDS | |
| Aztec | Tungsten | Underground | Past Producer | MRDS |
| B & M | Gold | Occurrence | MRDS | |
| B. and M. | Gold | Unknown | MRDS | |
| Barnard Quarry | Dimension Stone NEC | Surface | Abandoned | MSHA |
| Beech Hill Quarry | Dimension Sandstone | Surface | Intermittent | MSHA |
| Bad Boy Stone | Dimension Sandstone | Surface | Abandoned | MSHA |
| Badger | Fluorine-Fluorite | Underground | Past Producer | MRDS |
| Badger A Group of Mines | Gold Ore | Underground | Abandoned | MSHA |
| Barker | Tungsten | Underground | Past Producer | MRDS |
| Barron | Gold | Underground | Past Producer | MRDS |
| Bat Claim No. 1 | Copper | Past Producer | MRDS | |
| Bat No. 1 Claim | Uranium | Occurrence | MRDS | |
| Baxter, Boston, Columbia, Madelaine, Niwot, Sullivan #5, Utica | Gold | Occurrence | MRDS | |
| Beaver | Gold | Underground | Past Producer | MRDS |
| Beddig Mine | Tungsten | Underground | Past Producer | MRDS |
| Beggar | Gold | Underground | Past Producer | MRDS |
| Belcher | Silver, Gold | Underground | Past Producer | MRDS |
| Bell | Gold | Underground | Past Producer | MRDS |
| Bell Group | Gold, Silver | Past Producer | MRDS | |
| Bell Group | Uranium | Occurrence | MRDS | |
| Belle | Gold | Underground | Past Producer | MRDS |
| Belle of Memphis | Gold | Occurrence | MRDS | |
| Belle of Memphis | Gold | Underground | Past Producer | MRDS |
| Bellvue | Gold | Underground | Past Producer | MRDS |
| Belmont | Gold | Underground | Past Producer | MRDS |
| Belmont,holy Cross | Tungsten | Past Producer | MRDS | |
| Ben C. Lowell | Gold | Underground | Past Producer | MRDS |
| Benson Washer | Tungsten | Processing Plant | Past Producer | MRDS |
| Bertha | Gold, Silver | Occurrence | MRDS | |
| Beryl #1 | Niobium (Columbium), Tantalum, Beryllium | Occurrence | MRDS | |
| Beryl Lode Claim | Beryllium, Feldspar | Surface-Underground | Past Producer | MRDS |
| Beryl No 1 Prospect | Niobium (Columbium), Tantalum, Beryllium | Occurrence | MRDS | |
| Beryl No.1 & 2 Claims | Beryllium, Mica, Niobium (Columbium), Feldspar | Underground | Past Producer | MRDS |
| Big Bore | Gold | Occurrence | MRDS | |
| Big Cameron | Tungsten | Underground | Past Producer | MRDS |
| Big Five, Black Jack | Gold | Occurrence | MRDS | |
| Big Horn | Gold | Occurrence | MRDS | |
| Big Horn | Gold | Underground | Past Producer | MRDS |
| Big Horn Shaft | Molybdenum | Past Producer | MRDS | |
| Big John Mine | Gold | Occurrence | MRDS | |
| Big Six Mine | Tungsten | Underground | Past Producer | MRDS |
| Bigthing Buckhorn | Fluorine-Fluorite | Underground | Past Producer | MRDS |
| Birds Nest and Village Belle | Gold | Surface | Past Producer | MRDS |
| Bismark | Gold | Underground | Past Producer | MRDS |
| Black Ace Claims | Tungsten | Occurrence | MRDS | |
| Black Bear | Gold | Underground | Past Producer | MRDS |
| Black Cloud | Uranium | Occurrence | MRDS | |
| Black Cloud | Gold | Underground | Past Producer | MRDS |
| Black Hope No One | REE | Underground | Past Producer | MRDS |
| Black Iron, March, Mary Nelson, and Tungsten Mtn. Nos. 6 & 9 | Tungsten | Occurrence | MRDS | |
| Black King | Tungsten | Underground | Prospect | MRDS |
| Black Prince Mine | Tungsten | Underground | Past Producer | MRDS |
| Black Rose | Gold Ore | Underground | Abandoned | MSHA |
| Black Rose Mine | Gold, Silver | Underground | Past Producer | MRDS |
| Black Rose, Black Squirrel, Blue Bell, Crackerjack, Rogers Nos. 2, 12, 13 | Tungsten | Occurrence | MRDS | |
| Black Rover | Tungsten | Underground | Past Producer | MRDS |
| Blue Bird Mine | Underground | Past Producer | MRDS | |
| Blue Eagle | Gold | Occurrence | MRDS | |
| Blue Jay | Tungsten | Underground | Past Producer | MRDS |
| Blue Jay | Underground | Past Producer | MRDS | |
| Blue Ribbon | Gold | Underground | Past Producer | MRDS |
| Blue Stone Mines Inc | Fluorine-Fluorite | Underground | Past Producer | MRDS |
| Blue Stone Mines, Inc. | Fluorine-Fluorite | Occurrence | MRDS | |
| Bluebird Mine | Gold, Silver | Occurrence | MRDS | |
| Bobcat, Corkscrew, Crow, Mud Lake, Nabob, Richard | Tungsten | Underground | Past Producer | MRDS |
| Bonanza Mine | Tungsten | Underground | Past Producer | MRDS |
| Bondholder | Gold | Underground | Past Producer | MRDS |
| Boodle | Gold | Underground | Past Producer | MRDS |
| Boston | Gold | Underground | Past Producer | MRDS |
| Boulder Co. Mine | Silver, Gold, Tungsten, Lead | Occurrence | MRDS | |
| Boulder County Tungsten District | Tungsten | Past Producer | MRDS | |
| Boulder County Tunnel | Underground | Occurrence | MRDS | |
| Boulder Gravel Products | Sand and Gravel, Construction | Processing Plant | Past Producer | MRDS |
| Boulder Mill | Gold | Processing Plant | Past Producer | MRDS |
| Boulder Mine | Gold | Underground | Past Producer | MRDS |
| Brace | Tungsten | Underground | Past Producer | MRDS |
| Bradshaw | Uranium | Underground | Past Producer | MRDS |
| Brainard Lake Plant | Copper | Processing Plant | Past Producer | MRDS |
| Brannan Pit Number 14 | Sand and Gravel, Construction | Surface | Past Producer | MRDS |
| Brodies Saint Vrain | Flagstone | Surface | Past Producer | MRDS |
| Brooks, Broome Co., Olympic, Nebraska, Beatrice, Crater | Gold | Occurrence | MRDS | |
| Brown | Fluorine-Fluorite | Underground | Past Producer | MRDS |
| Brown Spar | Fluorine-Fluorite | Underground | Past Producer | MRDS |
| Buckhorn | Gold, Silver, Lead, Copper, Fluorine-Fluorite | Underground | Past Producer | MRDS |
| Buckingham, Hathaway Placers | Gold | Occurrence | MRDS | |
| Buckskin Joe No 1 | Gold | Underground | Past Producer | MRDS |
| Buena | Gold, Silver | Underground | Past Producer | MRDS |
| Buena Mine | Silver, Gold | Underground | Past Producer | MRDS |
| Buena Ventura | Gold | Underground | Past Producer | MRDS |
| Buena Vista Mine Nos 1-2-3 | Barium-Barite | Underground | Past Producer | MRDS |
| Bueno Mill | Gold Ore | Facility | Abandoned | MSHA |
| Bueno Mine | Gold Ore | Underground | Abandoned | MSHA |
| Bummers Creek Placers | Gold | Occurrence | MRDS | |
| Butch | Fluorine-Fluorite | Underground | Past Producer | MRDS |
| Button R Dam | Fluorine-Fluorite | Underground | Past Producer | MRDS |
| Cabin | Gold, Silver | Occurrence | MRDS | |
| Cal-Wood Mica Mine | Mica | Surface-Underground | Past Producer | MRDS |
| Carfield | Gold | Underground | Past Producer | MRDS |
| Caribou Hill Iron Deposit | Iron, Titanium | Occurrence | MRDS | |
| Caribou Mine | Gold, Lead, Silver | Underground | Past Producer | MRDS |
| Caribou Mine (based On Dmea Uranium Report) | Underground | Past Producer | MRDS | |
| Carl Gardner | Gold | Underground | Past Producer | MRDS |
| Carol Gore | Flagstone | Surface | Past Producer | MRDS |
| Cash | Gold | Underground | Past Producer | MRDS |
| Cash | Gold | Underground | Past Producer | MRDS |
| Cash Mill | Gold | Processing Plant | Past Producer | MRDS |
| Cash Mine | Gold Ore | Underground | Abandoned | MSHA |
| Cashier | Gold | Underground | Past Producer | MRDS |
| Castle Gulch | Gemstone | Underground | Past Producer | MRDS |
| Catastrophe | Tungsten | Underground | Past Producer | MRDS |
| Catham Lode | Tungsten | Occurrence | MRDS | |
| Celestial | Gold | Underground | Past Producer | MRDS |
| Celestial, Celestial Extension, Morning Star | Gold | Occurrence | MRDS | |
| Centennial Tunnel | Gold | Occurrence | MRDS | |
| Central Gulch Placers | Gold | Occurrence | MRDS | |
| Chancellor | Gold, Silver, Lead | Underground | Past Producer | MRDS |
| Cheyenne, Modoc, Tiger # 1 & 2 | Gold | Occurrence | MRDS | |
| Chingis Kahn | Gold | Underground | Past Producer | MRDS |
| Chivington Lode | Gold, Silver | Occurrence | MRDS | |
| Churchs Pit | Clay | Surface | Past Producer | MRDS |
| Clara | Gold | Underground | Past Producer | MRDS |
| Clara May | Gold | Underground | Past Producer | MRDS |
| Clark Tunnel | Underground | Unknown | MRDS | |
| Clemens | Flagstone | Surface | Past Producer | MRDS |
| Cleveland | Gold | Underground | Past Producer | MRDS |
| Clyde Mine | Tungsten | Underground | Past Producer | MRDS |
| Cobalt | Gold | Underground | Past Producer | MRDS |
| Cobalt Gold Mining Co | Nickel, Gold | Underground | Past Producer | MRDS |
| Cobalt-Gold Mining Co., Emily, Francis B., Acme | Gold | Occurrence | MRDS | |
| Col. Dick | Gold | Occurrence | MRDS | |
| Cold Spring Mine | Tungsten | Past Producer | MRDS | |
| Cold Spring and Red Cloud | Gold, Silver | Underground | Past Producer | MRDS |
| Cold Springs Group | Gold | Occurrence | MRDS | |
| Cold Springs Mine | Gold | Underground | Past Producer | MRDS |
| Colo Springs Tungsten Placer | Tungsten | Surface | Past Producer | MRDS |
| Colorado | Gold | Underground | Past Producer | MRDS |
| Colorado Miracle | Gold | Underground | Past Producer | MRDS |
| Columbia | Gold | Underground | Past Producer | MRDS |
| Columbus | Gold | Underground | Past Producer | MRDS |
| Comstock | Zinc, Silver, Lead | Underground | Past Producer | MRDS |
| Conger Mine | Tungsten | Surface-Underground | Past Producer | MRDS |
| Congo Chief | Silver | Underground | Past Producer | MRDS |
| Consolation | Fluorine-Fluorite | Underground | Past Producer | MRDS |
| Consolidated Caribou District | Gold Ore | Underground | NonProducing | MSHA |
| Coon Trail Creek Placers | Gold | Occurrence | MRDS | |
| Copeland | Tungsten | Underground | Past Producer | MRDS |
| Copeland Mines | Tungsten, Uranium | Underground | Past Producer | MRDS |
| Copper Blush | Uranium | Occurrence | MRDS | |
| Copper Blush | Gold | Underground | Past Producer | MRDS |
| Copper Glance | Gold | Unknown | MRDS | |
| Copper King Mine | Underground | Past Producer | MRDS | |
| Copper King Nickel Mine | Cobalt, Nickel | Past Producer | MRDS | |
| Copper King Nickel Mine | Nickel | Underground | Past Producer | MRDS |
| Copper King, Gold Drop | Gold | Occurrence | MRDS | |
| Corning | Gold | Underground | Past Producer | MRDS |
| Corning Tunnel | Gold | Occurrence | MRDS | |
| Corning Tunnel, Cold Spring, Alamakee, St. Joe, Blackhalk, Cash | Gold | Occurrence | MRDS | |
| Corundum | Gold | Occurrence | MRDS | |
| Cougar, Greyback | Molybdenum, Tungsten | Occurrence | MRDS | |
| Cowdry Mill | Tungsten | Processing Plant | Unknown | MRDS |
| Cracker Jack | Tungsten | Underground | Past Producer | MRDS |
| Crete | Tungsten | Surface-Underground | Past Producer | MRDS |
| Cross | Tungsten | Underground | Prospect | MRDS |
| Cross Mine | Zinc, Lead, Silver, Gold | Past Producer | MRDS | |
| Cross Mine | Gold Ore | Underground | NonProducing | MSHA |
| Cross-Missing Link | Tungsten | Underground | Past Producer | MRDS |
| Crow No 36 | Tungsten | Underground | Past Producer | MRDS |
| Crownpoint | Tungsten | Underground | Past Producer | MRDS |
| Daisy | Gold, Tungsten | Occurrence | MRDS | |
| Dam Waters Group | Flagstone | Surface | Past Producer | MRDS |
| David Mine | Gold | Underground | Past Producer | MRDS |
| David Owen | Gold | Underground | Past Producer | MRDS |
| December | Gold | Underground | Past Producer | MRDS |
| Degge Clark | Tungsten | Underground | Past Producer | MRDS |
| Delaware Group | Gold | Underground | Past Producer | MRDS |
| Denver City | Gold | Occurrence | MRDS | |
| Denver Post | Gold | Occurrence | MRDS | |
| Denver Rock Quarry | Tungsten | Processing Plant | Past Producer | MRDS |
| Des Moines | Fluorine-Fluorite | Underground | Past Producer | MRDS |
| Dew Drop | Gold | Underground | Occurrence | MRDS |
| Dewey Rocky Mountain | Stone, Crushed/Broken | Surface | Past Producer | MRDS |
| Diamond Group | Prospect | MRDS | ||
| Diamond K | Flagstone | Surface | Past Producer | MRDS |
| Diana | Gold | Underground | Past Producer | MRDS |
| Dillon | Tungsten | Underground | Past Producer | MRDS |
| Dime | Gold | Underground | Occurrence | MRDS |
| Dodge | Silver | Underground | Past Producer | MRDS |
| Dolittle | Gold | Underground | Past Producer | MRDS |
| Dolly | Gold | Underground | Past Producer | MRDS |
| Dolly No.one | Gold | Underground | Past Producer | MRDS |
| Dolly Varden | Gold | Underground | Past Producer | MRDS |
| Dorothy and Katie Mines | Tungsten | Underground | Past Producer | MRDS |
| Doss | Gold | Underground | Past Producer | MRDS |
| Doughty Placer | Gold | Occurrence | MRDS | |
| Dozer | Tungsten | Underground | Past Producer | MRDS |
| Dunraven | Gold | Underground | Past Producer | MRDS |
| Durias | Gold | Underground | Past Producer | MRDS |
| Dutch Park and Silver Point | Gold | Unknown | MRDS | |
| E J and R M Ford | Gold | Processing Plant | Past Producer | MRDS |
| Earl | Gold | Underground | Past Producer | MRDS |
| Early Spring | Tungsten | Underground | Past Producer | MRDS |
| East Boston | Gold | Underground | Past Producer | MRDS |
| Eastview | Tungsten | Surface-Underground | Past Producer | MRDS |
| Eclipse | Gold | Underground | Past Producer | MRDS |
| Eldorado | Clay | Surface | Past Producer | MRDS |
| Eldorado Quarry | Stone, Crushed/Broken | Unknown | MRDS | |
| Eldorado Springs | Geothermal | Surface | Unknown | MRDS |
| Elkhorn Or Tin Horn | Feldspar | Occurrence | MRDS | |
| Elkhorn Prospect | Feldspar, Mica | Surface | Occurrence | MRDS |
| Ella C | Gold | Underground | Past Producer | MRDS |
| Ellen | Gold | Underground | Past Producer | MRDS |
| Elsie Shaft and Windy Tunnel | Tungsten | Underground | Past Producer | MRDS |
| Emancipation | Gold | Underground | Past Producer | MRDS |
| Emancipation Mine | Gold, Silver | Occurrence | MRDS | |
| Emely | Gold | Underground | Past Producer | MRDS |
| Emerson | Gold | Unknown | MRDS | |
| Emilina | Gold | Occurrence | MRDS | |
| Emmet | Clay | Surface | Past Producer | MRDS |
| Emmit | Fluorine-Fluorite | Underground | Past Producer | MRDS |
| Empress Mine & Post Boy Tunnel | Gold | Underground | Past Producer | MRDS |
| Energy | Uranium | Occurrence | MRDS | |
| Enterprise Mine | Underground | Past Producer | MRDS | |
| Enterprise Vein | Gold | Occurrence | MRDS | |
| Equator | Gold | Underground | Past Producer | MRDS |
| Erie Pit | Sand and Gravel, Construction | Surface | Past Producer | MRDS |
| Eskimo | Gold | Underground | Past Producer | MRDS |
| Essco | Gold | Underground | Past Producer | MRDS |
| Eureka | Gold | Underground | Past Producer | MRDS |
| Eureka Alta | Gold | Underground | Past Producer | MRDS |
| Eureka Mine | Tungsten | Underground | Past Producer | MRDS |
| Evans | Gold | Underground | Past Producer | MRDS |
| Evans, Grant, Great Britain | Gold | Occurrence | MRDS | |
| Evening Star | Gold | Unknown | MRDS | |
| F G Watrous Tungsten Prospect | Tungsten | Underground | Past Producer | MRDS |
| Fair Count Vein | Tungsten | Occurrence | MRDS | |
| Fair Day | Uranium | Underground | Past Producer | MRDS |
| Fair Day Mine | Underground | Past Producer | MRDS | |
| Fair One | Tungsten | Underground | Past Producer | MRDS |
| Fairfax | Gold | Underground | Past Producer | MRDS |
| Fairmount | Gold | Underground | Past Producer | MRDS |
| Farmer Boy | Gold | Underground | Past Producer | MRDS |
| First National Bank | Gold | Surface | Occurrence | MRDS |
| Fisk | Gold | Underground | Past Producer | MRDS |
| Fitzgerald | Tungsten | Underground | Past Producer | MRDS |
| Fitzsimons No One | Tungsten | Underground | Past Producer | MRDS |
| Five Brothers | Gold | Underground | Past Producer | MRDS |
| Flourspar | Fluorine-Fluorite | Underground | Past Producer | MRDS |
| Floyd | Tungsten | Underground | Past Producer | MRDS |
| Fools Paradise Number 1 and 2 | Gold | Underground | Past Producer | MRDS |
| Ford | Gold | Underground | Past Producer | MRDS |
| Forest | Gold | Underground | Past Producer | MRDS |
| Forest Home | Tungsten | Underground | Past Producer | MRDS |
| Fortune | Gold | Occurrence | MRDS | |
| Fortune | Gold | Underground | Past Producer | MRDS |
| Fourmile Cr. Placer | Gold | Occurrence | MRDS | |
| Fourmile Cr. Placers | Gold | Occurrence | MRDS | |
| Fourmile Cr. Placers | Gold | Occurrence | MRDS | |
| Fourmile Creek Placers | Gold | Occurrence | MRDS | |
| Fourth of July | Gold | Underground | Past Producer | MRDS |
| Fourth of July Mine | Gold | Underground | Unknown | MRDS |
| Fox Hills Outcrop | Coal | Past Producer | MRDS | |
| Fox Hills Outcrop | Occurrence | MRDS | ||
| Fraction Lode | Tungsten | Past Producer | MRDS | |
| Franklin | Gold | Underground | Past Producer | MRDS |
| Franklin No 5 | Gold | Surface | Past Producer | MRDS |
| Free Courage | Gold | Surface | Occurrence | MRDS |
| G and S | Gold | Underground | Past Producer | MRDS |
| G. W. Horton Mill Site | Gold | Occurrence | MRDS | |
| Gale | Tungsten | Underground | Past Producer | MRDS |
| Gem | Tungsten | Underground | Past Producer | MRDS |
| George Henry | Gold | Underground | Past Producer | MRDS |
| Gertrude, President, Mermaid No. 1& 2, Keystone Placer, Greenback | Gold | Occurrence | MRDS | |
| Gibson | Uranium | Occurrence | MRDS | |
| Gilard | Gold | Underground | Past Producer | MRDS |
| Gillaspie and Big John | Gold | Underground | Past Producer | MRDS |
| Gina No 1 and 2 | Gold | Surface | Past Producer | MRDS |
| Gladiator | Gold | Underground | Past Producer | MRDS |
| Gladstone, Alice, McKinley | Fluorine-Fluorite, Gold | Occurrence | MRDS | |
| Gladys | Gold | Underground | Past Producer | MRDS |
| Gladys, Temborine, Dime, Evening Star Dirigo, | Gold | Occurrence | MRDS | |
| Glen Clover | Gold | Underground | Past Producer | MRDS |
| Gold Coin | Tungsten | Underground | Past Producer | MRDS |
| Gold Cross | Gold | Underground | Past Producer | MRDS |
| Gold Crystal | Gold | Occurrence | MRDS | |
| Gold Farm | Gold | Underground | Past Producer | MRDS |
| Gold Hill Beryl Claims (Unverifiable) | Beryllium | Underground | Past Producer | MRDS |
| Gold Hill District | Silver, Lead, Zinc, Gold | Past Producer | MRDS | |
| Gold Hill Mill | Gold Ore | Facility | Abandoned | MSHA |
| Gold King | Silver, Gold | Occurrence | MRDS | |
| Gold King | Gold | Underground | Past Producer | MRDS |
| Gold Lake | Surface | Prospect | MRDS | |
| Gold Lake & Manyon | Tungsten | Occurrence | MRDS | |
| Gold Lake Property | Uranium | Occurrence | MRDS | |
| Gold Lake Property | Uranium | Occurrence | MRDS | |
| Gold Lake Property | Uranium | Occurrence | MRDS | |
| Gold Lake Property | Uranium | Underground | Past Producer | MRDS |
| Gold Ring | Gold | Underground | Past Producer | MRDS |
| Gold Run Placers | Gold | Occurrence | MRDS | |
| Golden Age Mine | Silver, Gold | Underground | Past Producer | MRDS |
| Golden Bell | Gold, Silver | Occurrence | MRDS | |
| Golden Bell, Cleveland, Surprise, Yates | Gold | Occurrence | MRDS | |
| Golden Belle | Gold | Underground | Past Producer | MRDS |
| Golden Chest | Gold | Underground | Past Producer | MRDS |
| Golden Chest, Canton, Culebra | Gold | Occurrence | MRDS | |
| Golden Crown Group | Gold | Underground | Past Producer | MRDS |
| Golden Eagle | Gold | Occurrence | MRDS | |
| Golden Eagle | Stone, Crushed/Broken | Underground | Past Producer | MRDS |
| Golden Fox, Baltimore Belle, Ten Forty, Amazon, Glenwood | Gold | Occurrence | MRDS | |
| Golden Glow | Gold | Underground | Past Producer | MRDS |
| Golden Queen | Gold | Occurrence | MRDS | |
| Golden Reward | Uranium | Occurrence | MRDS | |
| Golden Reward | Gold | Underground | Past Producer | MRDS |
| Golden Slipper, Bloomer, Parole, Protection, Johannesburg, Red Lion | Gold | Occurrence | MRDS | |
| Goldfinch | Gold | Underground | Past Producer | MRDS |
| Goldsmith Maid | Uranium | Occurrence | MRDS | |
| Goldsmith Maid | Underground | Past Producer | MRDS | |
| Good Friday Mine | Tungsten | Underground | Past Producer | MRDS |
| Good Hope | Tungsten | Underground | Past Producer | MRDS |
| Goose Haven Pit | Construction Sand and Gravel | Surface | Abandoned | MSHA |
| Gordova | Gold | Underground | Past Producer | MRDS |
| Governor Group | Gold | Underground | Past Producer | MRDS |
| Grace | Gold | Underground | Past Producer | MRDS |
| Grand Central | Gold | Underground | Past Producer | MRDS |
| Grand Island-Caribou District | Gold, Lead, Silver | Surface-Underground | Past Producer | MRDS |
| Grand Republic | Gold | Occurrence | MRDS | |
| Grand Republic | Gold | Underground | Past Producer | MRDS |
| Grand Union | Gold | Underground | Past Producer | MRDS |
| Grand View | Tungsten, Gold | Underground | Past Producer | MRDS |
| Grant | Gold | Underground | Past Producer | MRDS |
| Grant County | Gold | Underground | Past Producer | MRDS |
| Graphic Mine | Gold | Underground | Past Producer | MRDS |