Skip to content
Every Hot Spring

Sunflower Flat Hot Spring

Sunflower Flat Hot Spring is a geothermal spring in Idaho. Water at the source is recorded at 109°F (43°C).

109°F43°C recorded at the source
Hot: most people last only minutes at the source. Look for mixing pools.

Facts

Coordinates
44.7330, -115.0180 (Google Maps, OSM)
Source temperature
109°F (43°C)
Access
Unknown
Type
Unknown
Fee
Not recorded
Clothing optional
Not recorded
Nearest town
Not recorded
State
Idaho
Data sources
NOAA NCEI. See sources

Map

Larger marker is Sunflower Flat Hot Spring; smaller markers are other springs within 50 miles.

Quick answers

How hot is Sunflower Flat Hot Spring?
The hottest recorded reading at the source is 109°F (43°C). That is the outlet temperature, not a pool temperature; water cools as it flows away from the source.
Where is Sunflower Flat Hot Spring?
Sunflower Flat Hot Spring is in Idaho, at coordinates 44.7330, -115.0180.
What other hot springs are near Sunflower Flat Hot Spring?
The closest listed springs, in straight-line distance, are Thomas Creek Ranch Hot Spring, under 1 mi; Sunflower Hot Springs, 1 mi; and Indian Creek Hot Spring, 7 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