Monument Geyser Basin
Wyoming
Not yet verified by our team 197° Too hot to touch (130°F+)
Monument Geyser Basin is a natural hot spring in Wyoming. NOAA's thermal springs survey recorded a maximum surface temperature of 197°F (92°C) at the source; soaking pools are usually cooler.
We haven't verified this spring yet. Details come from the 1980 NOAA survey and public listings, and some springs have since closed, been developed or become private. Been here recently? Tell us what you found.