Johnson Springs

Lincoln County, Wyoming · Near Afton
42.8170°N, 110.9970°W · 6,080 ft
115°F 6,080 ft Roadside Camping nearby (4.5 mi)
Aerial view of the ground around Johnson Springs LiDAR bare-earth view of the same ground around Johnson 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.

Johnson Springs is a hot spring in Lincoln County, Wyoming, seven miles from Afton. At 115 degrees on the record it is hotter than a bath and would need cooling or caution before anyone sat in it. Ownership is not on file and neither is public access. The spring is roadside, within a few hundred feet of a road, name not given.

Location

Around six thousand feet, with nine feet or so of snow in a winter and a couple feet of precipitation across the year. No land unit, no owner. Camping on record: Stump Creek Guard Station, under five miles.

Hot enough to hurt if you jump in, so test first and find the cooler edge. With no access status on record, the landowner question comes first. Winter is the listed season. The chemistry is from a 1971 sample, slightly acidic. No fee on file.

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 Johnson Springs.

Setting
Open ground
Flat, open ground all around.
Highest ground nearby
18 ft above the spring
Within a quarter mile, to the northwest
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
87 milliwatts per square meter of heat flow

That's about 1½ times the US average of 65. It's higher than at 26% 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
21°
Jan
24°
Feb
32°
Mar
36°
Apr
46°
May
58°
Jun
68°
Jul
67°
Aug
57°
Sep
42°
Oct
28°
Nov
19°
Dec
Annual Precip: 24.8 in Annual Snow: 110.6 in
Best Time to Visit
December Air 19°F · Water 115°F · +96° contrast
January Air 21°F · Water 115°F · +94° contrast
February Air 24°F · Water 115°F · +91° contrast
December offers 49°F more contrast than July
Current Conditions
Today 74° Low 37° Mostly Sunny
Spring is +41° warmer
Wednesday 76° Low 41° Sunny then Slight Chance Showers And Thunderstorms 13% precip
Spring is +39° warmer
Thursday 72° Low 37° Showers And Thunderstorms 78% precip
Spring is +43° warmer
Friday 69° Low 30° Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms 24% precip
Spring is +46° warmer
Saturday 70° Low 31° Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms 15% precip
Spring is +45° warmer
Water Chemistry Sampled 1971-09-10

The water at Johnson Springs is slightly acidic (pH 6.6). It is notably rich in calcium (may support bone density and joint health), magnesium (known for muscle relaxation and stress relief), and sodium (supports circulation and skin hydration).

pH 6.6 Slightly Acidic
pH influences mineral absorption through skin
Calcium 420 mg/L
May support bone density and joint health
Magnesium 69 mg/L
Known for muscle relaxation and stress relief
Sodium 1,400 mg/L
Supports circulation and skin hydration
Sulfate 1,300 mg/L
Traditionally used for skin conditions and inflammation
Chloride 1,900 mg/L
Natural antiseptic with skin health benefits
Nearby Camping
Nearby Camping
Stump Creek Guard Station 4.5 mi away

Overview Stump Creek Guard Station is located along what was once the Lander Cutoff for the Oregon Trail. Visitors can trace the path that covered wagons traveled on over 150 years ago on their way to the Pacific Northwest. Wagon ruts are still carved into the soil. The guard station is accessible by car during warmer months, but guests should be prepared to ski, snowshoe or snowmobile more than a mile to reach he cabin in winter. Guest will need to bring much of their own supplies and gea...

Reservable Yes
Reserve on Recreation.gov →
Mile-High Advisory 6,080 ft

Johnson Springs sits at 6,080 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 24% stronger than at sea level, so bring sunscreen and drink more water than you normally would.

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Temperature
115°F
Warm Hot Boiling
Water Temp 115°F (46°C)
Avg Air Temp 42°F
Above Ambient +74°F
Great soaking conditions September
Access
Road Access Roadside
Distance to Road 222 ft
Frequently Asked Questions
What is the water temperature at Johnson Springs?
Johnson Springs has a water temperature of 115°F (46°C). This is considered a hot spring, well above body temperature.
Where is Johnson Springs located?
Johnson Springs is located in Lincoln County, Wyoming at 6,080 feet elevation, near Afton. Coordinates: 42.8170°N, 110.9970°W.
How do I get to Johnson Springs?
Johnson Springs has Roadside road access (222 ft from the road).
Can I camp near Johnson Springs?
Yes, Stump Creek Guard Station is located nearby (4.5 miles away).
What minerals are in the water at Johnson Springs?
Water chemistry analysis shows the presence of pH, Calcium, Magnesium, Sodium, Sulfate, Chloride. The pH is 6.6 (slightly acidic).
Is it safe to soak at Johnson Springs?
With care. At 115°F Johnson Springs is hot enough to need short sessions, fifteen to twenty minutes, and plenty of water. Enter slowly and get out if you feel light-headed.
Sources: USGS NWIS