Warm Springs
Drag the handle to compare the two views. The orange dot marks the spring, in a frame about three quarters of a mile wide.
Warm Springs is a plain name for a spring on the outskirts of Idaho City in Boise County, under two miles from town. The 1981 reading lands at the upper end of soaking warm, hotter than most bathwater, and right at the edge where some people find it too much. Who owns the ground is not recorded, and no access status appears either, so despite being nearly in town it is unconfirmed as a place you can visit.
The record puts the nearest road four feet from the spring, so it is at the roadside, whatever the road is; no name is given. The altitude is modest, under four thousand feet. Winter snow comes in at around ninety inches a year. Moisture overall is middling.
Timing on record favors the middle of winter. Grayback campground is barely half a mile away. At the recorded temperature the water will feel hot going in and will not scald. Confirm you may enter the site, since ownership and access are both blanks in the record. The sample is from May 1981.
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 Warm Springs.
- Setting
- Hillside
- The spring sits on a steep slope that climbs to the northwest.
- Highest ground nearby
- 310 ft above the spring
- Within a quarter mile, to the northwest
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.
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.
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 Warm Springs is alkaline (pH 9.5).
Some links are affiliate links. We may earn a commission at no extra cost to you.
Overview Grayback Campground is located 36 miles northeast of Boise, Idaho, just off scenic Highway 21. Historic Idaho City is just two miles north of the campground. Visitors enjoy fishing in Mores Creek and exploring the Grayback Gulch Trail. Recreation Mores Creek can be accessed just below the campground. Anglers fish for whitefish and rainbow trout. Grayback Loop Trail begins within the site, offering a 1-mile footpath for hikers. Numerous trail opportunities are in the area just nort...
Warm Springs is road-accessible, so you can bring more gear.
As an Amazon Associate, we earn from qualifying purchases.
Springs Near Warm Springs
More Springs Around 108°F
Alkaline Springs (pH ~9.5)
Hike 6 waterfalls near Warm Springs
Looking for more outdoor adventures? Explore waterfall hikes near Warm Springs, Idaho.