Skip to content
Every Hot Spring

Pentagonal Spring

Pentagonal Spring is a geothermal spring in Wyoming. It is documented as closed to soaking and is listed for reference only.

Pentagonal Spring is a thermal feature inside Yellowstone National Park. Swimming or bathing in any water of entirely thermal origin is prohibited in the park, and hydrothermal areas may be viewed only from boardwalks and designated trails.

Facts

Coordinates
44.4634, -110.8528 (Google Maps, OSM)
Source temperature
Not recorded
Access
Public land
Type
Unknown
Fee
Not recorded
Clothing optional
Not recorded
Nearest town
Not recorded
State
Wyoming
Data sources
OpenStreetMap, Official sources (linked below). See sources

Map

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

Quick answers

Can you soak at Pentagonal Spring?
No. Pentagonal Spring is documented as closed to soaking or off-limits to bathing. It is listed for reference only; see the sources on this page.
Where is Pentagonal Spring?
Pentagonal Spring is in Wyoming, at coordinates 44.4634, -110.8528.
What other hot springs are near Pentagonal Spring?
The closest listed springs, in straight-line distance, are Opalescent Pool, under 1 mi; Cucumber Spring, under 1 mi; and Unng-Bsb-1, 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. National Park Servicenps.gov/yell/planyourvisit/safety.htm
  2. National Park Servicenps.gov/yell/learn/management/lawsandpolicies.htm

Merged from

  1. OpenStreetMap: mapped feature and its tags, ODbL