A history of the use of moderate-temperature geothermal resources at Calistoga, California, is presented. According to all historical sources and local lore, the Indians residing in the upper Napa Valley were the first to utilize the hot springs and steaming mud at Calistoga. By 1859, Samuel Brannan had acquired nearly 2000 acres of upper valley property including all the Springs Ground and was setting out to build a health spa. The first geysering hot water well at Calistoga was drilled on Brannan's resort grounds in the late 1860's. There remains only one uncapped geysering water well today. It is obvious that the hot water table has lowered in the area of the original Springs Ground since the development of the geothermal resources there. The decay and revival of Calistoga as a resort are described along with the history of the spectacular geysering wells