# Warm Springs, Idaho

Warm Springs in Idaho. 108°F (42°C). Roadside. Boise County.

- Page: https://www.soakingsprings.com/hot-springs/idaho/warm-springs-boise-county
- Source: Soaking Springs, researched and maintained by Armen Suny
- Updated: 2026-09-14

## Can you soak at Warm Springs?

The water leaves the ground at 108°F, a comfortable soaking temperature. You can drive right up to it. We haven't confirmed whether it has a pool or charges a fee.

## Key facts

| Fact | Value |
|---|---|
| Source water temperature | 108°F (42°C) (USGS record; developed pools are often cooled) |
| pH | 9.5 (Alkaline) |
| Elevation | 3,850 ft |
| Access | Roadside, 4 ft from the nearest road |
| County | Boise County |
| Nearest town | Idaho City |
| Coordinates | 43.81600, -115.86300 |
| Best months to soak | December, January, February (largest gap between water and average air temperature) |
| Nearest campground | GRAYBACK, 0.6 mi |

## About Warm Springs

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.

## Water chemistry

Lab sample from 1981-05-11 (Water Quality Portal).

| Measure | Value |
|---|---|
| pH | 9.5 |
| Calcium | 2 mg/L |
| Magnesium | 0.1 mg/L |
| Sodium | 65 mg/L |
| Sulfate | 22 mg/L |
| Chloride | 2.7 mg/L |

## Nearby

- Nearest city page: [Hot springs near Boise](https://www.soakingsprings.com/hot-springs/near/idaho/boise), 17 mi away
- State page: [Hot springs in Idaho](https://www.soakingsprings.com/hot-springs/idaho)
- [Twin Springs, ID](https://www.soakingsprings.com/hot-springs/idaho/twin-springs-1): 151°F source, pH 9.5, TDS 217 mg/L, Roadside, near Idaho City, Boise County, developed pools
- [Sheep Creek Bridge Hot Spring, ID](https://www.soakingsprings.com/hot-springs/idaho/sheep-creek-bridge-hot-spring): 142°F source, pH 9.5, Roadside, near Idaho City, Boise County, primitive pools, free
- [Smith Cabin Hot Spring, ID](https://www.soakingsprings.com/hot-springs/idaho/smith-cabin-hot-spring): 138°F source, pH 9.5, Roadside, near Idaho City, Boise County, primitive pools, free
- [Loftus Hot Spring, ID](https://www.soakingsprings.com/hot-springs/idaho/loftus-hot-spring): 129°F source, pH 9.6, Roadside, near Idaho City, Boise County, primitive pools, pools 100–110°F, free, year-round
- [Vaughn Hot Spring, ID](https://www.soakingsprings.com/hot-springs/idaho/vaughn-hot-spring): 154°F source, Short Walk, near Idaho City, Boise County, primitive pools, jul–nov
- [Ninemeyer Hot Springs, ID](https://www.soakingsprings.com/hot-springs/idaho/ninemeyer-hot-springs): 169°F source, pH 9.6, TDS 245 mg/L, Short Walk, near Idaho City, Boise County, primitive pools, jul–nov

## Questions

**What is the water temperature at Warm Springs?**
Warm Springs has a water temperature of 108°F (42°C). This is considered a hot spring, well above body temperature.

**Where is Warm Springs located?**
Warm Springs is located in Boise County, Idaho at 3,850 feet elevation, near Idaho City. Coordinates: 43.8160°N, 115.8630°W.

**How do I get to Warm Springs?**
Warm Springs has Roadside road access (4 ft from the road).

**Can I camp near Warm Springs?**
Yes, Grayback is located nearby (0.6 miles away).

**What minerals are in the water at Warm Springs?**
Water chemistry analysis shows the presence of pH, Calcium, Magnesium, Sodium, Sulfate, Chloride. The pH is 9.5 (alkaline).

## Sources

- USGS thermal springs records, Water Quality Portal lab analyses, OpenStreetMap, Wikipedia/Wikidata, NOAA climate normals
- https://en.wikipedia.org/wiki/Hot_spring