Josephs Coat Springs

Gallatin County, Wyoming · Near West Yellowstone
44.7390°N, 110.3240°W · 8,031 ft
199°F 8,031 ft Open Backcountry National Park Service Camping nearby (10.9 mi)
Very Hot Source, Use Extreme Caution

At 199°F, the source water at Josephs Coat 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.

Aerial view of the ground around Josephs Coat Springs LiDAR bare-earth view of the same ground around Josephs Coat Springs
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.

Josephs Coat Springs lie close to seven miles deep in Yellowstone's backcountry, Gallatin County, and what comes up is close to boiling. They sit on Park Service ground; access is open. The nearest town on the record is West Yellowstone, about twenty miles away. A destination for anyone wanting a look at a remote thermal area, and no place to bathe.

Location

Nearest road on file: the Grand Loop Road, with the springs roughly seven miles past it. The elevation is a touch over eight thousand feet. The yearly mean temperature is a degree above freezing and snowfall is over eleven feet. Moderate precipitation. The name on file is plural. No facilities appear on the record.

Winter months show as best on the record. Backcountry winter travel in the park has its own rules, so confirm with the park ahead of time. Tower Fall Campground, close to eleven miles away, is what the record gives for camping. The water will scald. The record carries no fee.

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 Josephs Coat Springs.

Setting
Canyon floor
Steep ground climbs away on both sides of the spring.
Highest ground nearby
371 ft above the spring
Within a quarter mile, to the north
Cross-section through the spring

A slice through the ground from north to south, 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 27°F warmer than the land around it.

Aerial view of the ground around Josephs Coat Springs Landsat thermal view of the same ground around Josephs Coat Springs
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
131 milliwatts per square meter of heat flow

That's about twice the US average of 65. It's higher than at 81% 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
37°
May
47°
Jun
58°
Jul
57°
Aug
48°
Sep
33°
Oct
22°
Nov
13°
Dec
Annual Precip: 27.4 in Annual Snow: 135.7 in
Best Time to Visit
December Air 13°F · Water 199°F · +186° contrast
January Air 14°F · Water 199°F · +185° contrast
February Air 16°F · Water 199°F · +183° contrast
December offers 45°F more contrast than July
Current Conditions
NNW 0.0 mph
Today 59° Low 34° Sunny
Spring is +140° warmer
Wednesday 64° Low 38° Sunny 1% precip
Spring is +135° warmer
Thursday 63° Low 39° Showers And Thunderstorms 76% precip
Spring is +136° warmer
Friday 55° Low 34° Rain Showers Likely 62% precip
Spring is +144° warmer
Saturday 58° Low 33° Mostly Sunny then Chance Showers And Thunderstorms 31% precip
Spring is +141° warmer
Nearby Camping
Nearby Camping
Tower Fall Campground 10.9 mi away

Overview Tower Fall Campground—elevation 6,600 feet (2012 m)—is on the north side of the steep, winding, road to Dunraven Pass. The campground is near the Tower General Store and Tower Fall. The Lamar Valley, with spectacular wildlife viewing opportunities, is nearby as are several Day Hikes in the Tower and Northeast Area. Roosevelt Lodge, a short drive from the campground, offers dining and horseback riding. For reservations at the campgrounds managed by Yellowstone National Park Lodges (F...

Reservable Yes
Reserve on Recreation.gov →
High Altitude Advisory 8,031 ft

At 8,031 feet, Josephs Coat Springs 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
199°F
Warm Hot Boiling
Water Temp 199°F (93°C)
Avg Air Temp 33°F
Above Ambient +166°F
Great soaking conditions September
Access
Open
Road Access Backcountry
Nearest Road Grand Loop Road
Distance to Road 6.7 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 Josephs Coat Springs?
Josephs Coat Springs has a water temperature of 199°F (93°C). This is considered a hot spring, well above body temperature.
Where is Josephs Coat Springs located?
Josephs Coat Springs is located in Gallatin County, Wyoming at 8,031 feet elevation, near West Yellowstone. Coordinates: 44.7390°N, 110.3240°W.
How do I get to Josephs Coat Springs?
Josephs Coat Springs has Backcountry road access, with the nearest road being Grand Loop Road (6.7 mi from the road).
Is Josephs Coat Springs free to visit?
Josephs Coat Springs has Open access. It is managed by National Park Service.
Can I camp near Josephs Coat Springs?
Yes, Tower Fall Campground is located nearby (10.9 miles away).
Is it safe to soak at Josephs Coat Springs?
No, not at the source. The water at Josephs Coat Springs reaches 199°F, which can cause severe burns within seconds. Look for cooled side pools or downstream stretches, and test with a hand before anything else.