Castle Rock Springs
California
Not yet verified by our team 163° Too hot to touch (130°F+)
Castle Rock Springs is a natural hot spring in California. NOAA's thermal springs survey recorded a maximum surface temperature of 163°F (73°C) at the source; soaking pools are usually cooler.
We haven't verified this spring yet. Details come from the 1980 NOAA survey and public listings, and some springs have since closed, been developed or become private. Been here recently? Tell us what you found.