Ashton Warm Spring
Ashton Warm Spring lies a mile or so outside Ashton in Fremont County, Idaho, a short walk off the Idaho Medal of Honor Highway. The water runs warm, under body temperature, with a near-neutral pH and iron among the minerals from a 1977 sample. Ownership is not recorded. Neither is public access.
Around five thousand feet, snowy, with five feet or so of snow through a winter and cold average temperatures. A tenth of a mile from the highway. The nearest campground on record is Warm River, about seven and a half miles off. No land unit is on file.
Winter takes the top spot in the season ranking. Expect snow on the ground. Warm River Campground is the camping option listed. Water chemistry is nearly fifty years old, so take the mineral line as historical. Nobody has recorded an access status, and the spring is near town, so check locally.
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 Ashton Warm Spring.
Drag the handle to compare the two views. The orange dot marks the spring, in a frame about three quarters of a mile wide.
- Setting
- Gentle slope
- The ground tilts gently up to the northeast.
- Highest ground nearby
- 31 ft above the spring
- Within a quarter mile, to the northeast
A slice through the ground from south to north, about 0.6 miles end to end.
Elevation data: USGS 3D Elevation Program. Aerial imagery: USGS The National Map. Public domain.
That's about 1½ times the US average of 65. It's higher than at 54% 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.
See every spring on the geothermal heat map →
Heat flow estimate: Stanford Thermal Earth Model (Aljubran & Horne, 2024), CC BY 4.0.
The water at Ashton Warm Spring is slightly alkaline (pH 7.9).
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Overview Warm River Campground is located on its namesake in the Caribou-Targhee National Forest of southwestern Idaho. Visitors love the campground for its river tubing opportunities. Fishing and hiking are popular as well. Recreation Warm River is a popular location for tubing and fishing. Anglers cast for whitefish, brook, rainbow and cutthroat trout. Numerous hiking, mountain biking and horseback riding trails are in the immediate area, leading to natural springs, waterfalls and old rai...
Ashton Warm Spring is road-accessible, so you can bring more gear. Cold air temperatures make a changing robe or warm layers essential.
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