Mines in Boulder County, Colorado
1,175Total
134Active
| 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 |