Mt St Helens Fumaroles Look only
Mt St Helens Fumaroles reads 190°F at the source (NCEI, historical reading). Managed by Mount St. Helens National Volcanic Monument, Gifford Pinchot National Forest (checked 2026-08-19).
190°F / 88°C
Boiling-class range at the source — scalds in seconds
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 46.198° N, 122.197° W · USGS National Map
- Land manager Mount St. Helens National Volcanic Monument, Gifford Pinchot National Forest — checked 2026-08-19
The rule here
This is a thermal feature to see, not a place to get in the water. Mount St. Helens National Volcanic Monument, Gifford Pinchot National Forest puts it this way:
“the following acts are prohibited in Areas One, Two, Three, and Mount Margaret Backcountry of Mount St. Helens National Volcanic Monument within the Gifford Pinchot National Forest … Entering or being in the Mount Helens Volcanic Crater.”
— Mount St. Helens National Volcanic Monument, Gifford Pinchot National Forest, checked 2026-08-19
Worth knowing: Forest Order 06-03-01-24-03, which the Monument posts as effective April 25, 2024 through April 25, 2027.
Nearby springs
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Longmire Mineral Springs
42 miles away · Washington · 77°F at the source
Look only
-
Ohanapecosh Hot Springs
48 miles away · Washington · 122°F at the source
Look only
-
Mt Rainier Fumaroles
50 miles away · Washington · 162°F at the source
Look only
Identity, coordinates, and temperature quoted from the NCEI Thermal Springs List (historical reading, 1981 compilation).