Casa Diablo Hot Pool
Drag the handle to compare the two views. The orange dot marks the spring, in a frame about three quarters of a mile wide.
Casa Diablo Hot Pool is a scalding thermal pool in Mono County, about seven miles from Mammoth Lakes, on ground owned by LADWP, the Los Angeles water and power utility. The water would burn you. Access is open, but this is a feature to look at. A 1992 USGS sample found it heavy in dissolved minerals, with iron among them.
Around seventy-one hundred feet, high desert, with roughly seven feet of snow a year and modest rain. Whatever road gets closest goes unnamed here, roughly five hundred feet off; the access class is short walk. LADWP ground, a utility's holding, with no park or forest status attached. Sherwin Creek is the campground on file, four miles and change.
Winter months listed, snow included. Camp at Sherwin Creek if you need to. The water scalds; keep away from the edge. The chemistry is from 1992 and the temperature reading carries no date, so neither should be taken as current. No fee is on record.
Aircraft with laser scanners measured this ground to within inches. The scan strips out trees and buildings, leaving the bare shape of the land around Casa Diablo Hot Pool.
- Setting
- Gentle slope
- The ground tilts gently up to the north.
- Highest ground nearby
- 257 ft above the spring
- Within a quarter mile, to the north
A slice through the ground from north to south, about 0.6 miles end to end.
Elevation data: USGS 3D Elevation Program. Aerial imagery: USGS The National Map. Public domain.
That's about twice the US average of 65. It's higher than at 82% of the springs on this site.
Heat flow measures the warmth working its way up through the ground from deep inside the earth. Where it runs high, rain and snowmelt that seep down through cracks in the rock come back up hot.
See every spring on the geothermal heat map →
Heat flow estimate: Stanford Thermal Earth Model (Aljubran & Horne, 2024), CC BY 4.0.
The water at Casa Diablo Hot Pool is slightly alkaline (pH 7.7) with 1230 mg/L total dissolved solids. It is notably rich in sodium (supports circulation and skin hydration), chloride (natural antiseptic with skin health benefits), and total dissolved solids (higher mineral concentration for therapeutic soaking).
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...
Casa Diablo Hot Pool sits at 7,070 feet above sea level, way above the mile-high mark. You may not feel the altitude strongly, but hot water still dehydrates you faster at elevation. UV is about 28% stronger than at sea level, so bring sunscreen and drink more water than you normally would.
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