The distribution of thermal features, primarily warm springs, indicates that Mt. St. Catherine hosts a low
to moderate temperature geothermal reservoir. Despite age dates of about 1 million years for the most
recent volcanic products, Mt. St. Catherine still provides a viable heat source for the system.
The geothermal system appears to be centered beneath the upper slopes of Mt. St. Catherine with
outflow north and northeast towards the chloride warm springs at Castle Hill and Chambord.
Temperature estimates from chemical geothermometry suggest a reservoir temperature of 350- 400 :F,
and potentially higher. The majority of thermal features, including the chloride springs, appear to lie on
the periphery of the geothermal reservoir. Despite high salinities, the warm springs at Castle Hill and
Chambord, have low temperatures, generally less than 110 :F, indicating substantial conductive cooling
along their flow paths.