Iron Spring Look only
Iron Spring reads 86°F at the source (NCEI, historical reading). Managed by Yellowstone National Park (checked 2026-08-19).
86°F / 30°C
Warm range at the source — bath-warm
Reading 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 44.662° N, 110.768° 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
-
Secret Valley Hot Springs
1 mile away · Wyoming · 95°F at the source
Look only
-
Beryl Spring
2 miles away · Wyoming · 198°F at the source
Look only
-
Monument Geyser Basin
2 miles away · Wyoming · 197°F at the source
Look only
Identity, coordinates, and temperature quoted from the NCEI Thermal Springs List (historical reading, 1981 compilation).