Boundary Creek Hot Springs

Gallatin County, Wyoming · Near West Yellowstone
44.2440°N, 111.0220°W · 6,575 ft
181°F 25°F air · Good soaking weather 6,575 ft Open Hike National Park Service Camping nearby (8.0 mi)
Very Hot Source, Use Extreme Caution

At 181°F, the source water at Boundary Creek 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.

Aerial view of the ground around Boundary Creek Hot Springs LiDAR bare-earth view of the same ground around Boundary Creek Hot 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.

Boundary Creek Hot Springs is a backcountry thermal spring in a remote part of Yellowstone National Park, thirty-five miles from West Yellowstone by the record's reckoning. The water is listed at 181 degrees, well past scalding. Reaching it means a hike of close to four miles from the nearest road. Access is open, in the sense that the park is public; the heat means you will not be getting in.

Location

Snowfall on record is enormous, more than eighteen feet in a season, and the annual precipitation runs over three and a half feet. Elevation is around 6,600 feet. The nearest road is almost four miles away and unnamed in the record. Cave Falls Campground is the closest camping listed, about eight miles off.

The record ranks the winter months highest; with this much snow, the hike in is a summer proposition. Scalding water, keep hands out. Cave Falls Campground is the listed camping. No fee on record, no chemistry, no temperature date.

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 Boundary Creek Hot Springs.

Setting
Hillside
The spring sits on a steep slope that climbs to the northeast.
Highest ground nearby
406 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.

Heat Below
107 milliwatts per square meter of heat flow

That's about 1½ times the US average of 65. It's higher than at 57% 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
18°
Jan
21°
Feb
29°
Mar
34°
Apr
43°
May
55°
Jun
66°
Jul
64°
Aug
54°
Sep
38°
Oct
26°
Nov
17°
Dec
Annual Precip: 43.1 in Annual Snow: 222.5 in
Best Time to Visit
December Air 17°F · Water 181°F · +164° contrast
January Air 18°F · Water 181°F · +163° contrast
February Air 21°F · Water 181°F · +160° contrast
December offers 48°F more contrast than July
Current Conditions
25°F
ESE 5.1 mph 100% Good soaking weather
Tuesday 65° Low 31° Sunny
Spring is +116° warmer
Wednesday 71° Low 40° Sunny 7% precip
Spring is +110° warmer
Thursday 68° Low 46° Showers And Thunderstorms 85% precip
Spring is +113° warmer
Friday 61° Low 44° Chance Showers And Thunderstorms 50% precip
Spring is +120° warmer
Saturday 64° Low 38° Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms 17% precip
Spring is +117° warmer
Nearby Camping
Nearby Camping
Cave Falls Campground 8.0 mi away

This campgrond is situated on the banks of Fall River in Wyoming along the south border of Yellowstone National Park.  Cave Falls Campground has 23 single site units and a terrific area for fishing. Each campsite has fire rings, grills and picnic tables.  Located throughout the campground are vault toilets, water faucets, bear proof storage boxes, and a dumpster.  The campground is located in grizzly bear habitat that requires special precautions be taken with food storage.

Reserve on Recreation.gov →
Mile-High Advisory 6,575 ft

Boundary Creek Hot Springs sits at 6,575 feet above sea level, way above the mile-high mark. You may not feel the altitude strongly, but hot water still dehydrates you faster at elevation. UV is about 26% stronger than at sea level, so bring sunscreen and drink more water than you normally would.

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Temperature
181°F
Warm Hot Boiling
Water Temp 181°F (83°C)
Avg Air Temp 39°F
Above Ambient +142°F
Great soaking conditions September
Access
Open
Road Access Hike
Distance to Road 3.8 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 Boundary Creek Hot Springs?
Boundary Creek Hot Springs has a water temperature of 181°F (83°C). This is considered a hot spring, well above body temperature.
Where is Boundary Creek Hot Springs located?
Boundary Creek Hot Springs is located in Gallatin County, Wyoming at 6,575 feet elevation, near West Yellowstone. Coordinates: 44.2440°N, 111.0220°W.
How do I get to Boundary Creek Hot Springs?
Boundary Creek Hot Springs has Hike road access (3.8 mi from the road).
Is Boundary Creek Hot Springs free to visit?
Boundary Creek Hot Springs has Open access. It is managed by National Park Service.
Can I camp near Boundary Creek Hot Springs?
Yes, Cave Falls Campground is located nearby (8.0 miles away).
Is it safe to soak at Boundary Creek Hot Springs?
No, not at the source. The water at Boundary Creek Hot Springs reaches 181°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: OpenStreetMap