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Every Hot Spring

Pioneer Spring

Pioneer Spring is a geothermal spring in Arizona. Water at the source is recorded at 91°F (33°C).

91°F33°C recorded at the source
Warm: pleasant on a hot day, cool in winter.

Facts

Coordinates
33.2090, -110.8180 (Google Maps, OSM)
Source temperature
91°F (33°C)
Access
Unknown
Type
Unknown
Fee
Not recorded
Clothing optional
Not recorded
Nearest town
Not recorded
State
Arizona
Data sources
NOAA NCEI. See sources

Map

Larger marker is Pioneer Spring; smaller markers are other springs within 50 miles.

Quick answers

How hot is Pioneer Spring?
The hottest recorded reading at the source is 91°F (33°C). That is the outlet temperature, not a pool temperature; water cools as it flows away from the source.
Where is Pioneer Spring?
Pioneer Spring is in Arizona, at coordinates 33.2090, -110.8180.
What other hot springs are near Pioneer Spring?
The closest listed springs, in straight-line distance, are Spring at 33.25, -110.70, 7 mi; Spring at 33.16, -110.66, 10 mi; and Mescal Warm Spring, 11 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.

Merged from

  1. NOAA NCEI Thermal Springs List (archived 2025): survey location and source temperature, public domain