Castle Mountain Mine

Castle Mountain Mine is a producer of gold, silver, clay, arsenic in San Bernardino County, California, in USGS's large output class. USGS gives a discovery year of 1907. It is one of 691 historic gold producers USGS lists in San Bernardino County, and number 2 when they are sorted by output class.

Facts

USGS status
Producer
Output class
large (USGS class)
Commodities
Gold, Silver, Clay, Arsenic, Antimony, Mercury, Molybdenum, Beryllium, Copper
Deposit type
Hot-spring Au-Ag
Discovered
1907
County
San Bernardino County
State
California
Land status (BLM data)
Land status not determined in the BLM dataset
USGS record
10310700

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. "Output class" is a code whose meaning changed over the years, so compare sites inside this data and do not read it as tonnage.

Land status comes from the BLM Surface Management Agency dataset and can be out of date. Check ownership before you go near any mine site.

Gold sites nearby

22 other USGS gold sites within 12 miles. The San Bernardino County page lists the biggest.