Approximate location — plotted from published sources, not a site visit, and not a guarantee of access.
San Diego County desert park on the Great Southern Overland Stage Route of 1849 at the western edge of Anza-Borrego, built around geothermally heated mineral springs. Outdoor pools plus an indoor therapeutic spa (~102 °F), camping, and short desert hiking trails make it a rare developed public hot-spring stop in the Colorado Desert.