 The Calistoga Spa Hot Springs is located at 1006 Washington Street and bordered by Gerard Street to the Northwest and Franklin Street to the Southeast.The indigenous Wappo civilization occupied the region for thousands of years and annually migrated to the upper valley to village near the exposed mineral pools found along the western ridge of the Mayacamas mountain range.Geothermal forces and tectonic activity elevate the temperature of the mineral water to 180 degrees Fahrenheit at the source.