# Keithly Warm Spring, Idaho

Keithly Warm Spring in Idaho. 86°F (30°C). Roadside. Washington County.

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

## Can you soak at Keithly Warm Spring?

The water leaves the ground at 86°F, about as warm as a heated pool. 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 | 86°F (30°C) (USGS record; developed pools are often cooled) |
| pH | 6.7 (Slightly Acidic) |
| Elevation | 2,560 ft |
| Access | Roadside, 151 ft from the nearest road |
| County | Washington County |
| Nearest town | Weiser |
| Coordinates | 44.49500, -116.73200 |
| Best months to soak | January, December, February (largest gap between water and average air temperature) |
| Nearest campground | MANN CREEK CAMPGROUND, 10.5 mi |

## About Keithly Warm Spring

A warm seep in Washington County, Idaho, twenty miles or so from Weiser, Keithly Warm Spring is tepid, warm to the hand and nothing more, which rules it out as a hot soak and makes it more of a curiosity. The record names no owner and is silent on public access. Its chemistry was sampled as recently as 2008, newer than most of the Idaho springs on file.

The road is close, about 150 feet from the source, though the record leaves it unnamed. Low country for Idaho, with mild winters by the standards of the state and snow totals that are modest. Precipitation is light. Without a land owner or unit on file there is nothing to say about what surrounds it beyond the county.

Winter comes up as the best time on record. Mann Creek Campground is the nearest on file, a bit over ten miles away. Nothing about the water temperature calls for caution. What does need checking is ownership and access, since neither is recorded.

## Water chemistry

Lab sample from 2008-09-24 (Water Quality Portal).

| Measure | Value |
|---|---|
| pH | 6.7 |
| Calcium | 20.5 mg/L |
| Magnesium | 10.7 mg/L |
| Sodium | 10.9 mg/L |
| Sulfate | 4.51 mg/L |
| Chloride | 1.95 mg/L |

## Nearby

- Nearest city page: [Hot springs near Weiser](https://www.soakingsprings.com/hot-springs/near/idaho/weiser), 13 mi away
- State page: [Hot springs in Idaho](https://www.soakingsprings.com/hot-springs/idaho)
- [Fairchild Hot Spring, ID](https://www.soakingsprings.com/hot-springs/idaho/fairchild-hot-spring): 126°F source, pH 8.5, Short Walk, near Weiser, Washington County
- [Lakey Hot Spring, ID](https://www.soakingsprings.com/hot-springs/idaho/lakey-hot-spring): 158°F source, pH 7.8, Short Walk, near Council, Adams County
- [Crane Creek Hot Springs, ID](https://www.soakingsprings.com/hot-springs/idaho/crane-creek-hot-springs): 198°F source, pH 7.8, Short Walk, near Weiser, Washington County
- [Old Homestead Warm Spring, ID](https://www.soakingsprings.com/hot-springs/idaho/old-homestead-warm-spring): Warm, pH 7.9, Short Walk, near Weiser, Washington County
- [Cove Creek Hot Spring, ID](https://www.soakingsprings.com/hot-springs/idaho/cove-creek-hot-spring): 131°F source, pH 7.4, Short Walk, near Payette, Payette County
- [Weiser Warm Springs, ID](https://www.soakingsprings.com/hot-springs/idaho/weiser-warm-springs): 72°F source, pH 6.6, Roadside, near Weiser, Washington County

## Questions

**What is the water temperature at Keithly Warm Spring?**
Keithly Warm Spring has a water temperature of 86°F (30°C). This is a warm thermal spring.

**Where is Keithly Warm Spring located?**
Keithly Warm Spring is located in Washington County, Idaho at 2,560 feet elevation, near Weiser. Coordinates: 44.4950°N, 116.7320°W.

**How do I get to Keithly Warm Spring?**
Keithly Warm Spring has Roadside road access (151 ft from the road).

**Can I camp near Keithly Warm Spring?**
Yes, Mann Creek Campground is located nearby (10.5 miles away).

**What minerals are in the water at Keithly Warm Spring?**
Water chemistry analysis shows the presence of pH, Calcium, Magnesium, Sodium, Sulfate, Chloride. The pH is 6.7 (slightly acidic).

## Sources

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