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Every Hot Spring

Byron Hot Springs

Byron Hot Springs is a geothermal spring near Byron in Contra Costa County, California. Water at the source is recorded at 96°F (36°C). It is documented as closed to soaking and is listed for reference only.

96°F36°C recorded at the source
Bath temperature: the sweet spot for a long soak.

Byron Hot Springs is a hot spring system consisting of 57 spring sources, in California, between Mountain House, California and Brentwood, California. It was developed into a historic resort and retreat.

Facts

Coordinates
37.8472, -121.6328 (Google Maps, OSM)
Source temperature
96°F (36°C)
Access
Unknown
Type
Unknown
Fee
Not recorded
Clothing optional
Not recorded
Nearest town
Byron
Data sources
NOAA NCEI, Wikipedia, Wikidata, Official sources (linked below). See sources

Map

Larger marker is Byron Hot Springs; smaller markers are other springs within 50 miles.

Quick answers

Can you soak at Byron Hot Springs?
No. Byron Hot Springs is documented as closed to soaking or off-limits to bathing. It is listed for reference only; see the sources on this page.
How hot is Byron Hot Springs?
The hottest recorded reading at the source is 96°F (36°C). That is the outlet temperature, not a pool temperature; water cools as it flows away from the source.
Where is Byron Hot Springs?
Byron Hot Springs is near Byron in Contra Costa County, California, at coordinates 37.8472, -121.6328.
What other hot springs are near Byron Hot Springs?
The closest listed springs, in straight-line distance, are Crohare Spring, 16 mi; Springs at 37.93, -121.97, 19 mi; and Lone Tree Mineral Spring, 21 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.

Checked against

  1. Wikipediaen.wikipedia.org/wiki/Byron_Hot_Springs

Merged from

  1. NOAA NCEI Thermal Springs List (archived 2025): survey location and source temperature, public domain
  2. Wikipedia: short description, CC BY-SA 4.0
  3. Wikidata: name, county and website, CC0