Castle Rock Springs
Castle Rock Springs is a geothermal spring in California. Water at the source is recorded at 163°F (73°C), hot enough to scald.
163°F73°C recorded at the source
Facts
- Coordinates
- 38.7680, -122.7170 (Google Maps, OSM)
- Source temperature
- 163°F (73°C)
- Access
- Unknown
- Type
- Unknown
- Fee
- Not recorded
- Clothing optional
- Not recorded
- Nearest town
- Not recorded
- State
- California
- Data sources
- NOAA NCEI. See sources
Map
Larger marker is Castle Rock Springs; smaller markers are other springs within 50 miles.
Quick answers
- How hot is Castle Rock Springs?
- The hottest recorded reading at the source is 163°F (73°C). That is the outlet temperature, not a pool temperature; water cools as it flows away from the source. Water this hot can cause serious burns, so test any pool by hand first.
- Where is Castle Rock Springs?
- Castle Rock Springs is in California, at coordinates 38.7680, -122.7170.
- What other hot springs are near Castle Rock Springs?
- The closest listed springs, in straight-line distance, are Anderson Springs, under 1 mi; Little Geysers, 2 mi; and Sulphur Creek, 4 mi.
Before you go
- Temperatures are measured at the source and can be far hotter than any soaking pool. Test with a hand before stepping in.
- Access, fees, and road conditions change. Verify with the land manager or owner; "public" here reflects survey records, not a current right of entry.
- Water in natural springs is untreated. Keep your head above water and avoid soaking with open wounds. Some springs carry Naegleria fowleri risk.
- Pack out everything, including soap residue. Many springs have been closed because of trash and overcrowding.
Sources
Dataset last rebuilt October 11, 2026. Not yet checked on site by a person. Access, fee, clothing and closure details appear only when a source below states them. How this data is built.
Merged from
- NOAA NCEI Thermal Springs List (archived 2025): survey location and source temperature, public domain