Red Mountain, formerly known as Osdick, is an

unincorporated community An unincorporated area is a parcel of land that is not governed by a local general-purpose municipal corporation. (At p. 178.) They may be governed or serviced by an encompassing unit (such as a county) or another branch of the state (such as th ...

San Bernardino County San Bernardino County ( ), officially the County of San Bernardino and sometimes abbreviated as S.B. County, is a county located in the southern portion of the U.S. state of California, and is located within the Inland Empire area. As of th ...

California California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...

, United States. Red Mountain was established in 1919 as Osdick, a silver mine boom town Red Mountain is south-southwest of

Trona Trona (trisodium hydrogendicarbonate dihydrate, also sodium sesquicarbonate dihydrate, Na2CO3·NaHCO3·2H2O) is a non- marine evaporite mineral. It is mined as the primary source of sodium carbonate in the United States, where it has replaced ...

, part of the mining district of

Randsburg, California Randsburg (formerly Rand Camp) is a census-designated place (CDP) in Kern County, California, Kern County, California, United States. Randsburg is located south of Ridgecrest, California, Ridgecrest, at an elevation of . The population was 69 in ...

and

Johannesburg, California Johannesburg is a census-designated place (CDP) in Kern County, California, in a mining district of the Rand Mountains. Johannesburg is located east-northeast of Randsburg, at an elevation of . The terminus of the Randsburg Railway was here ...

. Red Mountain has a

post office A post office is a public facility and a retailer that provides mail services, such as accepting letter (message), letters and parcel (package), parcels, providing post office boxes, and selling postage stamps, packaging, and stationery. Post o ...

with ZIP code 93558. The post office opened under the name Osdick in 1922 and changed its name to Red Mountain in 1929. In 2022, the community received a $1.5 million grant to clean sediment of arsenic from historic gold and silver mining from the kelly mine complex.

References

Populated places in the Mojave Desert Mining communities in California Unincorporated communities in San Bernardino County, California Unincorporated communities in California {{SanBernardinoCountyCA-geo-stub