Historic gold producers in Fremont County (USGS)
USGS records 14 historic gold producers in Fremont County: 14 past producers and 0 listed as producers or plants. For 11 of them USGS gives an output size (11 small). Production years are recorded for 9 sites, from 1850 to 1967. The most common deposit type is stratabound Precambrian sulfide, Colorado and Wyoming (7 sites).
Show the 14 sites
| Site | USGS status | Output | Commodities | Years |
|---|---|---|---|---|
| Cotopaxi District | Past producer | small | Zinc, Copper, Lead, Gold, Silver | 1850 to 1945 |
| Cotopaxi Mine | Past producer | small | Copper, Zinc, Gold, Silver, Lead, Iron, Molybdenum, Tungsten | 1875 to 1967 |
| Copper King Mine | Past producer | small | Copper, Gold, Silver | 1901 to 1908 |
| Dawson Mountain-Surprise Group | Past producer | small | Copper, Silver, Gold | 1902 |
| Green Mountain Mine | Past producer | small | Copper, Silver, Gold, Zinc, Molybdenum | 1925 to 1954 |
| Grape Creek/Greenhorn District | Past producer | small | Silver, Copper, Zinc, Gold, Lead, Thorium, Barium-Barite | 1943 to 1945 |
| Horseshoe Mine | Past producer | small | Lead, Zinc, Copper, Silver, Gold, Uranium, Iron | 1943 to 1947 |
| Arkansas River Placers District | Past producer | small | Gold, Silver, Copper, Lead, Zinc | to 1945 |
| Bear Claims Nos. 1 and 2 1977 | Past producer | small | Lead, Barium-Barite, Copper, Gold, Thorium, Silver | n/a |
| Isabel Mine | Past producer | small | Zinc, Copper, Lead, Silver, Gold | to 1932 |
| Unidentified Occurrence | Past producer | small | Gold | n/a |
| Cotopaxi | Past producer | n/a | Gold, Feldspar, Lead, Zinc, Copper | n/a |
| Horse Shoe & El Ploma | Past producer | n/a | Lead, Copper, Gold, Silver, Zinc | n/a |
| Isabel Mine | Past producer | n/a | Lead, Silver, Zinc, Gold | n/a |
Source: USGS Mineral Resources Data System (retrieved 2026-10-13). The database was last updated around 2011, positions can be approximate and "producer" does not mean a mine is operating today. Sites already matched to an MSHA record are shown in the MSHA tables.
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