Can you soak at Mammoth Hot Springs?

No. Mammoth Hot Springs 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 Mammoth Hot Springs?

The hottest recorded reading at the source is 163°F (73°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 Mammoth Hot Springs?

Mammoth Hot Springs is in Park County, Wyoming, at coordinates 44.9706, -110.7056.

What other hot springs are near Mammoth Hot Springs?

The closest listed springs, in straight-line distance, are Orange Mound Spring, under 1 mi; Hot River, 1 mi; and Bear Creek Springs, 5 mi.

Mammoth Hot Springs

Mammoth Hot Springs is a geothermal spring in Park County, Wyoming. Water at the source is recorded at 163°F (73°C), hot enough to scald. It is documented as closed to soaking and is listed for reference only.

163°F73°C recorded at the source

Scalding at the source. Do not enter without a cooled, mixed pool.

Mammoth Hot Springs is a large complex of hot springs on a hill of travertine in Yellowstone National Park adjacent to Fort Yellowstone and the Mammoth Hot Springs Historic District.

Facts

Coordinates: 44.9706, -110.7056 (Google Maps, OSM)
Source temperature: 163°F (73°C)
Access: Public land
Type: Unknown
Fee: Not recorded
Clothing optional: Not recorded
Nearest town: Not recorded
State: Wyoming
Data sources: NOAA NCEI, Wikipedia, Wikidata, Official sources (linked below). See sources

Map

Larger marker is Mammoth Hot Springs; smaller markers are other springs within 50 miles.

Quick answers

Can you soak at Mammoth Hot Springs?: No. Mammoth Hot Springs 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 Mammoth Hot Springs?: The hottest recorded reading at the source is 163°F (73°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 Mammoth Hot Springs?: Mammoth Hot Springs is in Park County, Wyoming, at coordinates 44.9706, -110.7056.
What other hot springs are near Mammoth Hot Springs?: The closest listed springs, in straight-line distance, are Orange Mound Spring, under 1 mi; Hot River, 1 mi; and Bear Creek Springs, 5 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

National Park Servicenps.gov/yell/planyourvisit/safety.htm
National Park Servicenps.gov/yell/learn/management/lawsandpolicies.htm

Merged from

NOAA NCEI Thermal Springs List (archived 2025): survey location and source temperature, public domain
Wikipedia: short description, CC BY-SA 4.0
Wikidata: name, county and website, CC0

Nearby springs

Orange Mound Spring
Park County / Public land / <1 mi away
Orange Mound Spring is one of the several hot springs in Yellowstone National Park. The name comes from its dark orange appearance caused by orange cyanobacteria living on the travertine, the rock that it is made of.
Hot River
136°F (58°C) / Public land / 1 mi away
Hot River, better known as the Boiling River, is where hot spring water from Mammoth Hot Springs enters the Gardner River near the North Entrance of Yellowstone National Park. It was once the park's best-known legal soaking spot, but the National Park Service reports that swimming there is not currently possible because of the impacts of the 2022 floods.
Bear Creek Springs
72°F (22°C) / Unknown / 5 mi away
Bear Creek Springs is a geothermal spring in Montana with a recorded surface temperature of 72°F (22°C).
Laduke (Corwin) Hot Spring
near Gardiner / 154°F (68°C) / Resort or commercial / 9 mi away
Yellowstone Hot Springs is a developed natural hot springs pool complex with an adjoining RV park on the Yellowstone River at Corwin Springs, north of Gardiner, Montana.
Apollinaris Spring
Public land / 9 mi away
Listed by NCEI as a thermal spring with a hot maximum surface temperature (no measured value recorded).
Gas Vents at Horseshoe Hill
Public land / 10 mi away
Listed by NCEI as a thermal spring with a hot maximum surface temperature (no measured value recorded).
Amphitheater Springs
196°F (91°C) / Public land / 12 mi away
Amphitheater Springs 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.
Semi-Centennial Geyser
198°F (92°C) / Public land / 13 mi away
Semi-Centennial Geyser 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.

All 335 hot springs in Wyoming