Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
FerBicarbonatesManganèse
Marble Hot Springs is located near Portola, California. Its iron-rich waters, at 38°C, are available in an indoor or outdoor bath, with a sauna and massage area, in the Sierra Nevada.
Insider tip — Portola in Plumas County is a Sierra Nevada foothill town on the Middle Fork Feather River, surrounded by the Plumas National Forest in one of California's most beautiful and least-visited mountain landscapes. Marble Hot Springs emerges from the volcanic-hydrothermal system of the northern Sierra Nevada where iron-rich mineral springs have been known to indigenous Maidu and Washoe peoples for thousands of years before California's gold rush brought European settlers to these geothermal highlands.