# Unnamed thermal spring, California

Unnamed thermal spring in California. Warm. Roadside · Public Land. Riverside County.

- Page: https://www.soakingsprings.com/hot-springs/california/unnamed-spring-riverside-county-1
- Source: Soaking Springs, researched and maintained by Armen Suny
- Updated: 2026-09-14

## Can you soak at this spring?

USGS lists this spring as a warm spring, with no temperature on record. You can drive right up to it. We haven't confirmed whether it has a pool or charges a fee.

## Key facts

| Fact | Value |
|---|---|
| Source water temperature | Warm (USGS record; developed pools are often cooled) |
| pH | 9.7 (Alkaline) |
| Total dissolved solids | 224 mg/L |
| Elevation | 3,600 ft |
| Access | Roadside · Public Land, 105 ft from the nearest road |
| Land | Cahuilla Reservation, TRIB |
| County | Riverside County |
| Nearest town | Anza |
| Coordinates | 33.54000, -116.74200 |
| Nearest campground | OAK GROVE CAMPGROUND, 11.0 mi |

## About Unnamed thermal spring

An unnamed thermal point on the Cahuilla Reservation in Riverside County, about three miles from Anza. It is tribal land, and public access is recorded as unknown, which should settle the question of dropping by uninvited. The record gives no temperature, only a warm tag, so there is no basis here for calling it a soak. The USGS sampled the water in the 1980s.

The spring is roadside, about a hundred feet from a nameless road, at around thirty-six hundred feet. The land designation on file is tribal land, the Cahuilla Reservation. Winters bring a little snow, seven inches on average, and the year's precipitation is around sixteen inches, with a mean temperature in the low sixties.

The USGS holds a monitoring site here and sampled the water in March 1986. The ground is part of the Cahuilla Reservation.

The record lists no best months. Oak Grove Campground is about eleven miles off. The water chemistry shown is from an old sample and reads strongly alkaline with low dissolved solids and some iron. Because this is reservation land with no access status, contact the tribe before visiting. Assume nothing.

## Water chemistry

Lab sample from 1986-03-11 (Water Quality Portal).

| Measure | Value |
|---|---|
| pH | 9.7 |
| Total dissolved solids | 224 mg/L |
| Calcium | 1.1 mg/L |
| Magnesium | 5.1 mg/L |
| Sodium | 69 mg/L |
| Sulfate | 28 mg/L |
| Chloride | 17 mg/L |
| Iron | 6 µg/L |

## Nearby

- Nearest city page: [Hot springs near Anza](https://www.soakingsprings.com/hot-springs/near/california/anza), 0 mi away
- State page: [Hot springs in California](https://www.soakingsprings.com/hot-springs/california)
- [Warner Hot Spring, CA](https://www.soakingsprings.com/hot-springs/california/warner-hot-spring): 138°F source, pH 6.6, TDS 355 mg/L, Roadside, near Julian, San Diego County
- [Agua Tibia Spring, CA](https://www.soakingsprings.com/hot-springs/california/agua-tibia-spring): 92°F source, Roadside, near Rainbow, San Diego County
- [Soboda Hot Springs, CA](https://www.soakingsprings.com/hot-springs/california/soboda-hot-springs): 102°F source, Roadside, near San Jacinto, Riverside County
- [Palm Springs (Agua Caliente Spring), CA](https://www.soakingsprings.com/hot-springs/california/palm-springs-agua-caliente-spring): 104°F source, pH 9.8, TDS 234 mg/L, Roadside, near Palm Springs, Riverside County
- [Murrietta Hot Springs, CA](https://www.soakingsprings.com/hot-springs/california/murrietta-hot-springs): 132°F source, pH 9.1, TDS 700 mg/L, Roadside, near Murrieta Hot Springs, Riverside County
- [Temecula Hot Springs, CA](https://www.soakingsprings.com/hot-springs/california/temecula-hot-springs): 116°F source, pH 9.1, TDS 700 mg/L, Roadside, near Murrieta Hot Springs, Riverside County

## Questions

**What is the water temperature at ?**
 is classified as warm. An exact temperature measurement has not been recorded.

**Where is  located?**
 is located in Riverside County, California at 3,600 feet elevation, near Anza. Coordinates: 33.5400°N, 116.7420°W.

**How do I get to ?**
 has Roadside road access (105 ft from the road).

**Is  free to visit?**
 has Unknown access. It is managed by DESG.

**Can I camp near ?**
Yes, Oak Grove Campground is located nearby (11.0 miles away).

**What minerals are in the water at ?**
Water chemistry analysis shows the presence of pH, Total Dissolved Solids, Calcium, Magnesium, Sodium, Sulfate, Chloride, Iron. The pH is 9.7 (alkaline). Total dissolved solids measure 224 mg/L.

## Sources

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