Apollinaris Spring Look only
Apollinaris Spring is recorded as hot in the NCEI list, with no numeric reading. Managed by Yellowstone National Park (checked 2026-08-19).
Hot
Recorded as “hot” — hotter than a hot tub; no numeric reading in the source list
Class from the NCEI Thermal Springs List (historical reading, 1981 compilation). Source temperature — lower pools usually run cooler.
Water temperatures change with flow and season — test before entering, and never submerge your head in warm natural water. CDC guidance on Naegleria fowleri.
- Coordinates 44.842° N, 110.732° W · USGS National Map
- Land manager Yellowstone National Park — checked 2026-08-19
The rule here
This is a thermal feature to see, not a place to get in the water. Yellowstone National Park puts it this way:
“On the other end of the temperature spectrum, the water in park hot springs often reaches the boiling point. For this reason, and to protect the park's unusual thermal environments, soaking in hot springs is prohibited.”
— Yellowstone National Park, checked 2026-08-19
Nearby springs
-
Gas Vents at Horseshoe Hill
3 miles away · Wyoming
Look only
-
Amphitheater Springs
3 miles away · Wyoming · 196°F at the source
Look only
-
Semi-Centennial Geyser
4 miles away · Wyoming · 198°F at the source
Look only
Identity, coordinates, and temperature quoted from the NCEI Thermal Springs List (historical reading, 1981 compilation).