Hot Springs At Sulphur Hills

Gallatin County, Wyoming · Near West Yellowstone
44.5910°N, 110.3210°W · 8,078 ft
196°F 26°F air · Good soaking weather 8,078 ft Open Hike National Park Service Camping nearby (19.4 mi)
Very Hot Source, Use Extreme Caution

At 196°F, the source water at Hot Springs At Sulphur Hills 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.

Aerial view of the ground around Hot Springs At Sulphur Hills LiDAR bare-earth view of the same ground around Hot Springs At Sulphur Hills
Aerial LiDAR bare earth

Drag the handle to compare the two views. The orange dot marks the spring, in a frame about three quarters of a mile wide.

Out in the Yellowstone backcountry of Gallatin County, the Sulphur Hills hot springs are a cluster of vents that run far hotter than anything a person could sit in. The nearest town is West Yellowstone, more than twenty miles away. National Park Service land, and public access is listed as open.

Location

A two-mile hike separates these springs from the nearest road, and the record does not say which road that is. Elevation is over eight thousand feet, so this is high, cold country. The average yearly temperature sits in the mid thirties. Snow piles up to around twelve feet over a typical year. The climate is moderately wet.

Threemile Campground is the closest camping the record names, about nineteen miles off. Winter shows as the best season on file, though that much snow means skis or snowshoes and a careful look at park winter rules. Water this hot will scald. Keep your distance from the vents and stay on firm ground. No fee shows on the record.

Terrain

Aircraft with laser scanners measured this ground to within inches. The scan strips out trees and buildings, leaving the bare shape of the land around Hot Springs At Sulphur Hills.

Setting
Hillside
The spring sits on a steep slope that climbs to the northeast.
Highest ground nearby
283 ft above the spring
Within a quarter mile, to the northeast
Cross-section through the spring

A slice through the ground from southwest to northeast, about 0.6 miles end to end.

Elevation data: USGS 3D Elevation Program. Aerial imagery: USGS The National Map. Public domain.

Seen From Space

Landsat's thermal camera passed over on a clear winter day, December 3, 2022. This spring's heat shows up from about 440 miles up. The brightest yellow marks the warmest ground, roughly 46°F warmer than the land around it.

Aerial view of the ground around Hot Springs At Sulphur Hills Landsat thermal view of the same ground around Hot Springs At Sulphur Hills
Aerial Thermal

Drag to compare. The view is about 2½ miles across, and each thermal pixel covers roughly 300 feet of ground, so individual pools blur into one warm patch.

Thermal: Landsat 8/9 surface temperature, USGS (public domain), via Microsoft Planetary Computer. Aerial: USGS The National Map. More springs seen from space.

Heat Below
88 milliwatts per square meter of heat flow

That's about 1½ times the US average of 65. It's higher than at 28% of the springs on this site.

Heat flow measures the warmth working its way up through the ground from deep inside the earth. Where it runs high, rain and snowmelt that seep down through cracks in the rock come back up hot.

Heat flow estimate: Stanford Thermal Earth Model (Aljubran & Horne, 2024), CC BY 4.0.

Monthly Climate
14°
Jan
16°
Feb
24°
Mar
29°
Apr
36°
May
47°
Jun
58°
Jul
58°
Aug
49°
Sep
35°
Oct
24°
Nov
14°
Dec
Annual Precip: 26.9 in Annual Snow: 144.0 in
Best Time to Visit
January Air 14°F · Water 196°F · +182° contrast
December Air 14°F · Water 196°F · +182° contrast
February Air 16°F · Water 196°F · +180° contrast
January offers 44°F more contrast than July
Current Conditions
26°F
N 0.0 mph 88% Good soaking weather
Today 61° Low 32° Sunny
Spring is +135° warmer
Wednesday 67° Low 36° Sunny 2% precip
Spring is +129° warmer
Thursday 64° Low 37° Showers And Thunderstorms 79% precip
Spring is +132° warmer
Friday 57° Low 31° Rain Showers Likely 62% precip
Spring is +139° warmer
Saturday 59° Low 31° Chance Showers And Thunderstorms 31% precip
Spring is +137° warmer
Nearby Camping
Nearby Camping
Threemile Campground 19.4 mi away

Overview Threemile Campground is located just three miles from the east entrance of Yellowstone National Park, and 50 miles from the full service gateway community of Cody, in northwestern Wyoming. The area is an ideal destination for a family getaway, with many opportunities for outdoor recreation. Hard-sided camp trailers and RVs are required.Recreation Great opportunities for hiking, fishing, scenic driving and wildlife viewing are available around the campground. The North Fork of the Sho...

Reservable Yes
Reserve on Recreation.gov →
High Altitude Advisory 8,078 ft

At 8,078 feet, Hot Springs At Sulphur Hills is in high-altitude territory where the air is noticeably thinner. Soaking in hot water accelerates dehydration and can amplify altitude effects like headache and fatigue. UV radiation is roughly 32% stronger here. Wear sunscreen even on overcast days and take breaks from the water to rehydrate.

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Temperature
196°F
Warm Hot Boiling
Water Temp 196°F (91°C)
Avg Air Temp 34°F
Above Ambient +162°F
Great soaking conditions September
Access
Open
Road Access Hike
Distance to Road 2.1 mi
Land
Ownership Federal
Agency National Park Service
Designation National Park
Unit Yellowstone National Park
Manager National Park Service
Protection 1 - Permanent protection, natural state
Frequently Asked Questions
What is the water temperature at Hot Springs At Sulphur Hills?
Hot Springs At Sulphur Hills has a water temperature of 196°F (91°C). This is considered a hot spring, well above body temperature.
Where is Hot Springs At Sulphur Hills located?
Hot Springs At Sulphur Hills is located in Gallatin County, Wyoming at 8,078 feet elevation, near West Yellowstone. Coordinates: 44.5910°N, 110.3210°W.
How do I get to Hot Springs At Sulphur Hills?
Hot Springs At Sulphur Hills has Hike road access (2.1 mi from the road).
Is Hot Springs At Sulphur Hills free to visit?
Hot Springs At Sulphur Hills has Open access. It is managed by National Park Service.
Can I camp near Hot Springs At Sulphur Hills?
Yes, Threemile Campground is located nearby (19.4 miles away).
Is it safe to soak at Hot Springs At Sulphur Hills?
No, not at the source. The water at Hot Springs At Sulphur Hills reaches 196°F, which can cause severe burns within seconds. Look for cooled side pools or downstream stretches, and test with a hand before anything else.