# Mammoth Hot Springs, Wyoming

Mammoth Hot Springs in Wyoming. 163°F (73°C). Roadside · Public Land. Gallatin County.

- Page: https://www.soakingsprings.com/hot-springs/wyoming/mammoth-hot-springs
- Source: Soaking Springs, researched and maintained by Armen Suny
- Updated: 2026-09-14

## Can you soak at Mammoth Hot Springs?

Not at the source. The water leaves the ground at 163°F, hot enough to burn skin. You can drive right up to it. It's on National Park Service land.

## Key facts

| Fact | Value |
|---|---|
| Source water temperature | 163°F (73°C) (USGS record; developed pools are often cooled) |
| Elevation | 6,589 ft |
| Access | Roadside · Public Land, 20 ft from the nearest road (Upper Terrace Drive) |
| Land | Yellowstone National Park, National Park Service |
| County | Gallatin County |
| Nearest town | West Yellowstone |
| Coordinates | 44.96700, -110.70800 |
| Best months to soak | December, January, February (largest gap between water and average air temperature) |
| Nearest campground | Mammoth Campground (Yellowstone), 0.9 mi |

## Soaking safety

**Very Hot Source, Use Extreme Caution.** At 163°F, the source water at Mammoth Hot Springs is hot enough to cause burns. Some hot springs this hot have cooler side pools or downstream areas suitable for soaking. Always test the water temperature before entering.

## About Mammoth Hot Springs

Mammoth Hot Springs is the big complex of hot springs on a travertine hill in Yellowstone National Park, Gallatin County, with a measured temperature hot enough to scald. It sits right beside Upper Terrace Drive. People come to look at the travertine, and there is a campground under a mile away. Park Service land, public access open.

Upper Terrace Drive runs within twenty feet of the springs, so this is a roadside stop. The springs rise on a hill of travertine. The elevation is around sixty-six hundred feet. Snowfall runs a bit over nine feet a year; the mean for the year is in the upper thirties. Precipitation is about two feet a year.

The travertine hill built up over thousands of years as hot water cooled at the surface and dropped calcium carbonate, the mineral that builds travertine. By one estimate more than two tons of it come up in solution every day, and the sheer number of vents keeps the travertine growing. The complex sits next to Fort Yellowstone and the Mammoth Hot Springs Historic District.

Best months on record are December through February. Mammoth Campground, less than a mile off, is the camping on record. The water is scalding; keep to established ground. Access is open and roadside, no fee recorded. With the road that near, winter access comes down to plowing, and the park sets that.

## Nearby

- Nearest city page: [Hot springs near Cody](https://www.soakingsprings.com/hot-springs/near/wyoming/cody), 81 mi away
- State page: [Hot springs in Wyoming](https://www.soakingsprings.com/hot-springs/wyoming)
- [Hot River, WY](https://www.soakingsprings.com/hot-springs/wyoming/hot-river): 136°F source, Short Walk, near West Yellowstone, Gallatin County
- [Bear Creek Springs, MT](https://www.soakingsprings.com/hot-springs/montana/bear-creek-springs): 72°F source, Short Walk, near West Yellowstone, Gallatin County
- [Apollinaris Spring, WY](https://www.soakingsprings.com/hot-springs/wyoming/apollinaris-spring): Hot, pH 5.4, Roadside, near West Yellowstone, Gallatin County
- [Laduke (Corwin) Hot Spring, MT](https://www.soakingsprings.com/hot-springs/montana/laduke-corwin-hot-spring): 154°F source, Roadside, near West Yellowstone, Gallatin County
- [Gas Vents At Horseshoe Hill, WY](https://www.soakingsprings.com/hot-springs/wyoming/gas-vents-at-horseshoe-hill): Hot, pH 6.6, Hike, near West Yellowstone, Gallatin County
- [Amphitheater Springs, WY](https://www.soakingsprings.com/hot-springs/wyoming/amphitheater-springs): 196°F source, pH 6.0, Short Walk, near West Yellowstone, Gallatin County

## Questions

**What is the water temperature at Mammoth Hot Springs?**
Mammoth Hot Springs has a water temperature of 163°F (73°C). This is considered a hot spring, well above body temperature.

**Where is Mammoth Hot Springs located?**
Mammoth Hot Springs is located in Gallatin County, Wyoming at 6,589 feet elevation, near West Yellowstone. Coordinates: 44.9670°N, 110.7080°W.

**How do I get to Mammoth Hot Springs?**
Mammoth Hot Springs has Roadside road access, with the nearest road being Upper Terrace Drive (20 ft from the road).

**Is Mammoth Hot Springs free to visit?**
Mammoth Hot Springs has Open access. It is managed by National Park Service.

**Can I camp near Mammoth Hot Springs?**
Yes, Mammoth Campground (Yellowstone) is located nearby (0.9 miles away).

**Is it safe to soak at Mammoth Hot Springs?**
No, not at the source. The water at Mammoth Hot Springs reaches 163°F, which can cause severe burns within seconds. Look for cooled side pools or downstream stretches, and test with a hand before anything else.

## Sources

- USGS thermal springs records, Water Quality Portal lab analyses, OpenStreetMap, Wikipedia/Wikidata, NOAA climate normals
- https://en.wikipedia.org/wiki/Mammoth_Hot_Springs