# Alkali Flats Warm Spring, Idaho

Alkali Flats Warm Spring in Idaho. 93°F (34°C). Short Walk · Public Land. Bingham County.

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

## Can you soak at Alkali Flats Warm Spring?

The water leaves the ground at 93°F, a comfortable soaking temperature. It's a short walk from the road. We haven't confirmed whether it has a pool or charges a fee.

## Key facts

| Fact | Value |
|---|---|
| Source water temperature | 93°F (34°C) (USGS record; developed pools are often cooled) |
| pH | 6.6 (Slightly Acidic) |
| Elevation | 5,675 ft |
| Access | Short Walk · Public Land, 0.9 mi from the nearest road |
| Land | Fort Hall Reservation, TRIB |
| County | Bingham County |
| Nearest town | Shelley |
| Coordinates | 43.03800, -112.00400 |
| Best months to soak | January, December, February (largest gap between water and average air temperature) |
| Nearest campground | Morgans Bridge Campground, 4.2 mi |

## About Alkali Flats Warm Spring

Alkali Flats Warm Spring runs thin and comes out a touch under body heat. It's in Bingham County, Idaho, roughly twenty-four miles from Shelley, and sits inside the Fort Hall Reservation, so this is tribal ground. Nothing on record says if the public can go. USGS measured the flow and got a trickle.

High, dry country, around fifty-seven hundred feet, with cold winters that bring upward of five feet of snow. The nearest road has no name on record and sits a little under a mile off; the walk is listed as short. The land lies within the reservation, and no Field Office or forest is attached to it.

Start with the access question. The reservation has not been recorded as open, so get permission before walking in. Morgans Bridge Campground is the closest camping on file, a little over four miles off. Winter months are the ones listed as best, which is odd for a spring below body heat. The chemistry dates to a 1977 sample.

## Water chemistry

Lab sample from 1977-08-18 (Water Quality Portal).

| Measure | Value |
|---|---|
| pH | 6.6 |
| Calcium | 210 mg/L |
| Magnesium | 68 mg/L |
| Sodium | 34 mg/L |
| Sulfate | 340 mg/L |
| Chloride | 17 mg/L |

## Nearby

- Nearest city page: [Hot springs near Blackfoot](https://www.soakingsprings.com/hot-springs/near/idaho/blackfoot), 10 mi away
- State page: [Hot springs in Idaho](https://www.soakingsprings.com/hot-springs/idaho)
- [Yandell Springs, ID](https://www.soakingsprings.com/hot-springs/idaho/yandell-springs): 90°F source, pH 7.1, Roadside, near Blackfoot, Bingham County
- [Blackfoot River Warm Spring, ID](https://www.soakingsprings.com/hot-springs/idaho/blackfoot-river-warm-spring): 79°F source, Roadside, near Soda Springs, Caribou County
- [Wilson Lake Warm Spring, ID](https://www.soakingsprings.com/hot-springs/idaho/wilson-lake-warm-spring): 86°F source, Short Walk, near Soda Springs, Caribou County
- [Portneuf River Warm Spring, ID](https://www.soakingsprings.com/hot-springs/idaho/portneuf-river-warm-spring): 93°F source, pH 6.2, Short Walk, near Soda Springs, Caribou County
- [Blackfoot Reservoir Warm Spring, ID](https://www.soakingsprings.com/hot-springs/idaho/blackfoot-reservoir-warm-spring): 72°F source, Short Walk, near Soda Springs, Caribou County
- [Tadpole Warm Spring, ID](https://www.soakingsprings.com/hot-springs/idaho/tadpole-warm-spring): 68°F source, Roadside, near Chubbuck, Bannock County

## Questions

**What is the water temperature at Alkali Flats Warm Spring?**
Alkali Flats Warm Spring has a water temperature of 93°F (34°C). This is a warm thermal spring.

**Where is Alkali Flats Warm Spring located?**
Alkali Flats Warm Spring is located in Bingham County, Idaho at 5,675 feet elevation, near Shelley. Coordinates: 43.0380°N, 112.0040°W.

**How do I get to Alkali Flats Warm Spring?**
Alkali Flats Warm Spring has Short Walk road access (0.9 mi from the road).

**Is Alkali Flats Warm Spring free to visit?**
Alkali Flats Warm Spring has Unknown access. It is managed by DESG.

**Can I camp near Alkali Flats Warm Spring?**
Yes, Morgans Bridge Campground is located nearby (4.2 miles away).

**What minerals are in the water at Alkali Flats Warm Spring?**
Water chemistry analysis shows the presence of pH, Calcium, Magnesium, Sodium, Sulfate, Chloride. The pH is 6.6 (slightly acidic).

## Sources

- USGS thermal springs records, Water Quality Portal lab analyses, OpenStreetMap, Wikipedia/Wikidata, NOAA climate normals