# Bat Hot Spring, Pence Hot Spring, Idaho

Bat Hot Spring, Pence Hot Spring in Idaho. 117°F (47°C). Short Walk. Elmore County.

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

## Can you soak at Bat Hot Spring, Pence Hot Spring?

Only once it cools. The water leaves the ground at 117°F, hotter than any hot tub. 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 | 117°F (47°C) (USGS record; developed pools are often cooled) |
| pH | 8.2 (Slightly Alkaline) |
| Total dissolved solids | 243 mg/L |
| Elevation | 2,590 ft |
| Access | Short Walk, 0.3 mi from the nearest road (Hot Springs Road) |
| County | Elmore County |
| Nearest town | Mountain Home Air Force Base |
| Coordinates | 42.79700, -115.72300 |
| Best months to soak | January, December, February (largest gap between water and average air temperature) |

## About Bat Hot Spring, Pence Hot Spring

Bat Hot Spring, also listed as Pence Hot Spring, is a hot spring in Elmore County, Idaho, right at Mountain Home Air Force Base by the distance on record, which rounds to zero. The water is hot, above the range most people soak in. Hot Springs Road runs a third of a mile away. Owner and access are not recorded.

Low desert by the numbers: ten inches of precipitation and under a foot of snow, with a warm average year. Elevation is around twenty-six hundred feet. From Hot Springs Road you finish on foot, and the distance is small. The record names no land unit and lists no campground.

Climate puts winter first here, and light snow is less of a barrier. Chemistry is from 1989, alkaline with iron present. The water is hot enough to hurt. Ease in or stay out. No fee listed. Access status is missing, and with an Air Force base this close, find out whose land it is before you go.

## Water chemistry

Lab sample from 1989-03-08 (Water Quality Portal).

| Measure | Value |
|---|---|
| pH | 8.2 |
| Total dissolved solids | 243 mg/L |
| Calcium | 11 mg/L |
| Magnesium | 1.2 mg/L |
| Sodium | 49 mg/L |
| Sulfate | 20 mg/L |
| Chloride | 8.9 mg/L |
| Iron | 50 µg/L |

## Nearby

- Nearest city page: [Hot springs near Mountain Home Air Force Base](https://www.soakingsprings.com/hot-springs/near/idaho/mountain-home-air-force-base), 0 mi away
- State page: [Hot springs in Idaho](https://www.soakingsprings.com/hot-springs/idaho)
- [Bruneau Hot Spring, ID](https://www.soakingsprings.com/hot-springs/idaho/bruneau-hot-spring): 106°F source, pH 8.6, Roadside, near Mountain Home Air Force Base, Elmore County
- [Buckaroo Hot Spring, ID](https://www.soakingsprings.com/hot-springs/idaho/buckaroo-hot-spring): 109°F source, pH 8.2, Roadside, near Mountain Home Air Force Base, Elmore County
- [Lower Indian Bathtub Hot Springs, ID](https://www.soakingsprings.com/hot-springs/idaho/lower-indian-bathtub-hot-springs): 108°F source, pH 8.7, Short Walk, near Mountain Home Air Force Base, Elmore County, primitive pools, pools 102°F, free, year-round
- [Indian Bathtub Hot Springs, ID](https://www.soakingsprings.com/hot-springs/idaho/indian-bathtub-hot-springs): 99°F source, pH 8.6, TDS 248 mg/L, Short Walk, near Mountain Home Air Force Base, Elmore County, primitive pools, pools 93–96°F, free
- [Hot Springs, ID](https://www.soakingsprings.com/hot-springs/idaho/hot-springs-elmore-county): 158°F source, pH 9.4, TDS 286 mg/L, Short Walk, near Mountain Home, Elmore County
- [Coyote Hot Spring, ID](https://www.soakingsprings.com/hot-springs/idaho/coyote-hot-spring): 135°F source, TDS 250 mg/L, Roadside, near Glenns Ferry, Elmore County, primitive pools, pools 100–104°F, free, may–oct

## Questions

**What is the water temperature at Bat Hot Spring, Pence Hot Spring?**
Bat Hot Spring, Pence Hot Spring has a water temperature of 117°F (47°C). This is considered a hot spring, well above body temperature.

**Where is Bat Hot Spring, Pence Hot Spring located?**
Bat Hot Spring, Pence Hot Spring is located in Elmore County, Idaho at 2,590 feet elevation, near Mountain Home Air Force Base. Coordinates: 42.7970°N, 115.7230°W.

**How do I get to Bat Hot Spring, Pence Hot Spring?**
Bat Hot Spring, Pence Hot Spring has Short Walk road access, with the nearest road being Hot Springs Road (0.3 mi from the road).

**What minerals are in the water at Bat Hot Spring, Pence Hot Spring?**
Water chemistry analysis shows the presence of pH, Total Dissolved Solids, Calcium, Magnesium, Sodium, Sulfate, Chloride, Iron. The pH is 8.2 (slightly alkaline). Total dissolved solids measure 243 mg/L.

**Is it safe to soak at Bat Hot Spring, Pence Hot Spring?**
With care. At 117°F Bat Hot Spring, Pence Hot Spring 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 thermal springs records, Water Quality Portal lab analyses, OpenStreetMap, Wikipedia/Wikidata, NOAA climate normals