# Casa Diablo Hot Pool, California

Casa Diablo Hot Pool in California. 165°F (74°C). Short Walk · Public Land. Mono County.

- Page: https://www.soakingsprings.com/hot-springs/california/casa-diablo-hot-pool
- Source: Soaking Springs, researched and maintained by Armen Suny
- Updated: 2026-09-14

## Can you soak at Casa Diablo Hot Pool?

Not at the source. The water leaves the ground at 165°F, hot enough to burn skin. It's a short walk from the road.

## Key facts

| Fact | Value |
|---|---|
| Source water temperature | 165°F (74°C) (USGS record; developed pools are often cooled) |
| pH | 7.7 (Slightly Alkaline) |
| Total dissolved solids | 1,230 mg/L |
| Elevation | 7,070 ft |
| Access | Short Walk · Public Land, 508 ft from the nearest road |
| Land | Los Angeles Department of Water and Power, CITY |
| County | Mono County |
| Nearest town | Mammoth Lakes |
| Coordinates | 37.64700, -118.85900 |
| Best months to soak | February, December, January (largest gap between water and average air temperature) |
| Nearest campground | SHERWIN CREEK, 4.5 mi |

## Soaking safety

**Very Hot Source, Use Extreme Caution.** At 165°F, the source water at Casa Diablo Hot Pool is hot enough to cause burns. Some hot springs this hot have cooler side pools or downstream areas suitable for soaking. Always test the water temperature before entering.

## About Casa Diablo Hot Pool

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.

## Water chemistry

Lab sample from 1992-04-15 (Water Quality Portal).

| Measure | Value |
|---|---|
| pH | 7.7 |
| Total dissolved solids | 1,230 mg/L |
| Calcium | 6.8 mg/L |
| Magnesium | 0.16 mg/L |
| Sodium | 350 mg/L |
| Sulfate | 110 mg/L |
| Chloride | 240 mg/L |
| Iron | 5 µg/L |

## Nearby

- Nearest city page: [Hot springs near Clovis](https://www.soakingsprings.com/hot-springs/near/california/clovis), 73 mi away
- State page: [Hot springs in California](https://www.soakingsprings.com/hot-springs/california)
- [Hot Creek Springs, CA](https://www.soakingsprings.com/hot-springs/california/hot-creek-springs-1): 171°F source, pH 8.7, Roadside, near Mammoth Lakes, Mono County
- [Chance Spring, CA](https://www.soakingsprings.com/hot-springs/california/chance-spring): 73°F source, pH 8.7, TDS 1,410 mg/L, Short Walk, near Mammoth Lakes, Mono County
- [Hot Creek Gorge Springs, CA](https://www.soakingsprings.com/hot-springs/california/hot-creek-gorge-springs): 199°F source, pH 8.0, TDS 1,170 mg/L, Short Walk, near Mammoth Lakes, Mono County
- [Hot Springs, CA](https://www.soakingsprings.com/hot-springs/california/hot-springs-mono-county): 129°F source, pH 7.3, Short Walk, near Mammoth Lakes, Mono County
- [Casa Diablo Hot Springs And Geyser, CA](https://www.soakingsprings.com/hot-springs/california/casa-diablo-hot-springs-and-geyser): 199°F source, pH 6.8, TDS 967 mg/L, Short Walk, near Mammoth Lakes, Mono County
- [Whitmore Hot Springs, CA](https://www.soakingsprings.com/hot-springs/california/whitmore-hot-springs): 95°F source, pH 8.7, Short Walk, near Mammoth Lakes, Mono County

## Questions

**What is the water temperature at Casa Diablo Hot Pool?**
Casa Diablo Hot Pool has a water temperature of 165°F (74°C). This is considered a hot spring, well above body temperature.

**Where is Casa Diablo Hot Pool located?**
Casa Diablo Hot Pool is located in Mono County, California at 7,070 feet elevation, near Mammoth Lakes. Coordinates: 37.6470°N, 118.8590°W.

**How do I get to Casa Diablo Hot Pool?**
Casa Diablo Hot Pool has Short Walk road access (508 ft from the road).

**Is Casa Diablo Hot Pool free to visit?**
Casa Diablo Hot Pool has Open access. It is managed by CITY.

**Can I camp near Casa Diablo Hot Pool?**
Yes, Sherwin Creek is located nearby (4.5 miles away).

**What minerals are in the water at Casa Diablo Hot Pool?**
Water chemistry analysis shows the presence of pH, Total Dissolved Solids, Calcium, Magnesium, Sodium, Sulfate, Chloride, Iron. The pH is 7.7 (slightly alkaline). Total dissolved solids measure 1,230 mg/L.

**Is it safe to soak at Casa Diablo Hot Pool?**
No, not at the source. The water at Casa Diablo Hot Pool reaches 165°F, which can cause severe burns within seconds. Look for cooled side pools or downstream stretches, and test with a hand before anything else.

## Sources

- USGS thermal springs records, Water Quality Portal lab analyses, OpenStreetMap, Wikipedia/Wikidata, NOAA climate normals