The geyser erupts boiling water at about 93 °C (200 °F). Photo by Shaul Hurwitz on April 12, 2007. Deep beneath Yellowstone Lake, the pressure increases due to the weight of overlying water. The hottest springs in the deepest part of the lake, at 125 m (410 ft) below the water, have a temperature of 174 °C (345 °F).
About The facility, the closest hot spring to Yellowstone National Park, will have a 3,750-square-foot pool, with an average temperature of 102 degrees Fahrenheit. A hot plunge will be 104 degrees, while a cold plunge will be 70 degrees.
The best months to visit Yellowstone are April, September, and October. These “off season” months provide more chances to catch a glimpse of the local wildlife and enjoy thinner crowds. Bears emerge from hibernation between March and April, migrating birds arrive just before May, and the elk rut begins mid-September.
If you do any hiking or camping in Yellowstone, you SHOULD bring bear spray. Generally, you don't need bear spray when visiting the popular and crowded geyser areas and villages, such as Old Faithful and Canyon Village.