Franklin Hot Springs
- Location
- California, United States
- Water type
- sodium chloride, calcium-rich
- Temperature
- 35 °C
- pH
- 7.9
Water profile
Soothing — neither hot nor cold, perfect balance.
Loaded with major ions — the essential minerals (Ca, Mg).
Dense, salty water — you float without effort.
Somewhere in the layered landscape of northern California, Franklin Hot Springs draws from a geothermal source carrying a dual mineral signature of sodium-chloride and calcium — a combination that gives the water an unusually complex mineral character. The water surfaces at 35°C, comfortably warm in the region's variable climate, with the sodium-chloride component lending a clean, softening salinity to the soak while the calcium-rich fraction adds a subtle mineral density. The notably alkaline pH of 7.9 produces a particularly smooth, gentle bathing experience characteristic of calcium-bearing waters. The resort format makes Franklin accessible for day visitors and overnighters alike, situated in a Northern California landscape of oak woodland and rolling hills that provides a restful, uncrowded alternative to the state's more famous coastal and Sierra thermal destinations.