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Casa Diablo Hot Springs, California facts for kids

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Casa Diablo Hot Springs
Casa Diablo Hot Springs is located in California
Casa Diablo Hot Springs
Casa Diablo Hot Springs
Location in California
Country United States
State California
County Mono County
7,319 ft (2,231 m)
Casa Diablo
The power plant (bottom) with the formerly active geothermal areas on the slope above (white areas).

Casa Diablo Hot Springs is a hot springs and active geothermal location, near Mammoth Lakes and the Eastern Sierra Nevada, in Mono County, eastern California.


It is within the northern part of the Long Valley Caldera volcanic feature and zone, and beside U.S. Highway 395. California State Route 203 branches off to the west from the Highway 395 interchange at Casa Diablo Hot Springs, leading to the Mammoth Lakes and ski resort area, and Devils Postpile National Monument.


Casa Diablo Hot Springs was once the site of a regularly erupting geyser. It was an obsidian mine for Native Americans. Casa Diablo was a stagecoach station from 1878 to 1881. A tourist stop was built here in the 1920s, including an 'Indian Trading Post' and service station alongside old Highway 395.

Geothermal power

A power plant generating geothermal electric power is now located here, operated by Mammoth Pacific, LP.

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