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Every Hot Spring

Bumpass Hell

Bumpass Hell is a geothermal spring near Mineral in Shasta County, California. Water at the source is recorded at 199°F (93°C), hot enough to scald. It is documented as closed to soaking and is listed for reference only.

199°F93°C recorded at the source
Scalding at the source. Do not enter without a cooled, mixed pool.

Bumpass Hell is the largest and most spectacular hydrothermal area in Lassen Volcanic National Park, a basin of boiling springs, mudpots and fumaroles near the boiling point at its altitude. It is a protected national park feature viewed from a boardwalk, not a soaking spring.

Facts

Coordinates
40.4574, -121.5030 (Google Maps, OSM)
Source temperature
199°F (93°C)
Access
Public land
Type
Unknown
Fee
Not recorded
Clothing optional
Not recorded
Nearest town
Mineral
Data sources
NOAA NCEI, Wikidata, Official sources (linked below). See sources

Map

Larger marker is Bumpass Hell; smaller markers are other springs within 50 miles.

Quick answers

Can you soak at Bumpass Hell?
No. Bumpass Hell is documented as closed to soaking or off-limits to bathing. It is listed for reference only; see the sources on this page.
How hot is Bumpass Hell?
The hottest recorded reading at the source is 199°F (93°C). That is the outlet temperature, not a pool temperature; water cools as it flows away from the source. Water this hot can cause serious burns, so test any pool by hand first.
Where is Bumpass Hell?
Bumpass Hell is near Mineral in Shasta County, California, at coordinates 40.4574, -121.5030.
What other hot springs are near Bumpass Hell?
The closest listed springs, in straight-line distance, are Bumpass Hot Springs, under 1 mi; Big Boiler, under 1 mi; and Bumpass Hell Creek, under 1 mi.

Before you go

  • Temperatures are measured at the source and can be far hotter than any soaking pool. Test with a hand before stepping in.
  • Access, fees, and road conditions change. Verify with the land manager or owner; "public" here reflects survey records, not a current right of entry.
  • Water in natural springs is untreated. Keep your head above water and avoid soaking with open wounds. Some springs carry Naegleria fowleri risk.
  • Pack out everything, including soap residue. Many springs have been closed because of trash and overcrowding.

Sources

Dataset last rebuilt October 11, 2026. Not yet checked on site by a person. Access, fee, clothing and closure details appear only when a source below states them. How this data is built.

Checked against

  1. Wikipediaen.wikipedia.org/wiki/Geothermal_areas_in_Lassen_Volcanic_N…

Merged from

  1. NOAA NCEI Thermal Springs List (archived 2025): survey location and source temperature, public domain
  2. Wikidata: name, county and website, CC0