Little Warm Spring

Sublette County, Wyoming · Near Pinedale
43.5200°N, 109.6690°W · 7,403 ft
77°F 30°F air · Good soaking weather 7,403 ft Roadside Camping nearby (17.2 mi)
Aerial view of the ground around Little Warm Spring LiDAR bare-earth view of the same ground around Little Warm Spring
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.

Little Warm Spring is a tepid spring in Sublette County, Wyoming, a long way out from Pinedale, the closest town on file at about 46 miles. The water is warm to the hand and nothing more, so this is a place to look at rather than sit in. The nearest road is a private ranch access road, and public access is not on record. That combination should shape any plan to visit.

Location

The spring sits a few steps off a private road belonging to a ranch, at elevation in the upper Green River country. Land owner is blank on file. Winters here are long and white, with over a hundred inches of snow in a normal year and an annual mean temperature only a few degrees above freezing. Precipitation is moderate. No land unit or designation is recorded.

Winter, December through February, is what the record calls the best season, and that is hard to square with the snow totals. Treat the calendar with suspicion and check road conditions. Access runs over a private ranch road and permission is not on record. Ask before you go. Green River Lake Lodge is the closest campground listed, about seventeen miles away.

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 Little Warm Spring.

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

A slice through the ground from northwest to southeast, about 0.6 miles end to end.

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

Heat Below
91 milliwatts per square meter of heat flow

That's about 1½ times the US average of 65. It's higher than at 33% 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
16°
Jan
17°
Feb
25°
Mar
31°
Apr
40°
May
54°
Jun
62°
Jul
61°
Aug
51°
Sep
36°
Oct
23°
Nov
14°
Dec
Annual Precip: 21.5 in Annual Snow: 103.9 in
Best Time to Visit
December Air 14°F · Water 77°F · +63° contrast
January Air 16°F · Water 77°F · +61° contrast
February Air 17°F · Water 77°F · +61° contrast
December offers 48°F more contrast than July
Current Conditions
30°F
Clear WNW 29.0 mph 74% Good soaking weather
Tuesday 61° Low 32° Mostly Sunny
Spring is +16° warmer
Wednesday 65° Low 41° Sunny then Slight Chance Showers And Thunderstorms 19% precip
Spring is +12° warmer
Thursday 62° Low 43° Showers And Thunderstorms 76% precip
Spring is +15° warmer
Friday 60° Low 43° Mostly Sunny then Chance Showers And Thunderstorms 30% precip
Spring is +17° warmer
Saturday 60° Low 36° Sunny then Chance Showers And Thunderstorms 32% precip
Spring is +17° warmer
Where to Stay

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Nearby Camping
Green River Lake Lodge 17.2 mi away

Overview The Green River Lakes Lodge is located 50 miles north of Pinedale, Wyoming. The lodge is available as a rental for day use events such as weddings, family reunions, or meetings for up to 50 guests, or as an overnight rental for smaller groups of up to 12 guests. Recreation During the summer months, hiking and horseback riding into the Bridger Wilderness and Wind River Range are popular activities enjoyed by visitors to the area. The lake is open to small watercraft only, making it...

Reservable Yes
Reserve on Recreation.gov →
Mile-High Advisory 7,403 ft

Little Warm Spring sits at 7,403 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 30% stronger than at sea level, so bring sunscreen and drink more water than you normally would.

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Temperature
77°F
Warm Hot Boiling
Water Temp 77°F (25°C)
Avg Air Temp 36°F
Above Ambient +41°F
Mild soaking conditions September
Access
Road Access Roadside
Nearest Road Three Spear Ranch Access Road (Private)
Distance to Road 140 ft
Frequently Asked Questions
What is the water temperature at Little Warm Spring?
Little Warm Spring has a water temperature of 77°F (25°C). This is a warm thermal spring.
Where is Little Warm Spring located?
Little Warm Spring is located in Sublette County, Wyoming at 7,403 feet elevation, near Pinedale. Coordinates: 43.5200°N, 109.6690°W.
How do I get to Little Warm Spring?
Little Warm Spring has Roadside road access, with the nearest road being Three Spear Ranch Access Road (Private) (140 ft from the road).
Can I camp near Little Warm Spring?
Yes, Green River Lake Lodge is located nearby (17.2 miles away).