Casa Diablo Hot Springs And Geyser
Casa Diablo Hot Springs and Geyser erupts at 199 degrees Fahrenheit—one of California's most extreme geothermal features. Located at 7,418 feet elevation within the Inyo National Forest, this active thermal system represents rare geothermal dynamism in the Sierra high country.
The geyser sits 182 feet from Casa Diablo Cutoff road, accessible by a short foothill walk through alpine meadows and sparse whitebark pine. Boiling water erupts from the ground surface with audible steam discharge and colorful mineral deposits, creating a landscape that feels extraterrestrial compared to the surrounding wilderness.
Casa Diablo Hot Springs sits atop the Long Valley Caldera, a major geothermal field with documented heat flow anomalies and subsurface reservoirs. Recent USGS analysis shows water chemistry distinctly different from Casa Diablo Hot Pool—lower calcium but elevated sodium (230 mg/L)—indicating distinct thermal reservoirs and flow paths.
This is an active, dangerous thermal feature. Observe from marked safe zones only and keep clear of boiling pools and steam vents. Access is seasonal—July through September for road access and weather. Sherwin Creek Campground (3 kilometers away) offers nearby camping. Check with local authorities for any seasonal closures.|
Is Casa Diablo Hot Springs And Geyser worth visiting?
Best for
- Observing powerful hot springs
- Overnight camping trips
Not ideal for
- Casual soaking
The water at Casa Diablo Hot Springs And Geyser is neutral (pH 6.8) with 967 mg/L total dissolved solids. It is notably rich in chloride (natural antiseptic with skin health benefits).
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Overview Sherwin Creek Campground is located in the eastern Sierra Nevada Mountains within 2 miles of the full-service community of Mammoth Lakes, California. Popular among anglers, hikers, off-road vehicle enthusiasts and photographers, the campground is near some of the most spectacular wilderness and outdoor recreation areas in the Sierras.Recreation With a motocross track and trails, Sherwin Creek is a hot spot for off-road vehicle enthusiasts. The area's majestic scenery and challenging...