Hot Springs East Of Mary Lake
Drag the handle to compare the two views. The orange dot marks the spring, in a frame about three quarters of a mile wide.
East of Mary Lake in the Yellowstone interior there are hot springs the record flags as hot without giving a measured temperature. Gallatin County, National Park Service land, open access, under ten miles from West Yellowstone as the crow flies. How hot is not on file, so no soak can be planned around it.
The Norris-Canyon Road is the nearest road listed, and the springs are six and a half miles beyond it, all of it backcountry. Elevation puts this above eight thousand feet. The climate record shows a yearly average one degree over freezing and twelve-odd feet of snow, with moderate precipitation spread across the year. Expect a short snow-free season.
No best-months entry here. Go by the snow instead and confirm trail conditions with the park before you walk in. Indian Creek Campground shows up as the nearest campground, roughly twenty miles away. Temperature is unrecorded, so assume it could scald until proven otherwise, and keep off the crust around any vent. No fee is noted.
Aircraft with laser scanners measured this ground to within inches. The scan strips out trees and buildings, leaving the bare shape of the land around Hot Springs East Of Mary Lake.
- Setting
- Gentle slope
- The ground tilts gently up to the south.
- Highest ground nearby
- 128 ft above the spring
- Within a quarter mile, to the south
A slice through the ground from southwest to northeast, about 0.6 miles end to end.
Elevation data: USGS 3D Elevation Program. Aerial imagery: USGS The National Map. Public domain.
Landsat's thermal camera passed over on a clear winter day, February 21, 2020. This spring's heat shows up from about 440 miles up. The brightest yellow marks the warmest ground, roughly 20°F warmer than the land around it.
Drag to compare. The view is about 2½ miles across, and each thermal pixel covers roughly 300 feet of ground, so individual pools blur into one warm patch.
Thermal: Landsat 8/9 surface temperature, USGS (public domain), via Microsoft Planetary Computer. Aerial: USGS The National Map. More springs seen from space.
That's about twice the US average of 65. It's higher than at 77% of the springs on this site.
Heat flow measures the warmth working its way up through the ground from deep inside the earth. Where it runs high, rain and snowmelt that seep down through cracks in the rock come back up hot.
See every spring on the geothermal heat map →
Heat flow estimate: Stanford Thermal Earth Model (Aljubran & Horne, 2024), CC BY 4.0.
Overview Located about eight miles (13 km) south of Mammoth Hot Springs on the road to Norris, Indian Creek Campground—elevation 7,300 feet (2225 m)—sits near the base of the Gallatin Mountains and offers breathtaking views of Electric Peak. The area offers easy access to fishing and hiking. The campground is away from the main road and provides a quieter, more primitive, experience than many other locations. For reservations at the campgrounds managed by Yellowstone National Park Lodges (Fi...
At 8,210 feet, Hot Springs East Of Mary Lake is in high-altitude territory where the air is noticeably thinner. Soaking in hot water accelerates dehydration and can amplify altitude effects like headache and fatigue. UV radiation is roughly 33% stronger here. Wear sunscreen even on overcast days and take breaks from the water to rehydrate.
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