Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
FerBicarbonatesManganèse
Trimble Spa and Hot Spring, in Durango, Colorado, draws on iron-rich thermal water around 39°C. The facility combines indoor and outdoor baths, a sauna and massages, in the mountainous southwest of the state.
Insider tip — Trimble Hot Springs occupies a historic spa site north of Durango in the Animas River valley, operating since the 1870s. The iron-bearing geothermal waters feed an outdoor pool with views toward the San Juan peaks. The facility blends a heritage resort atmosphere with modern amenities, making it a popular stop for cyclists and hikers tackling the Animas trail system.