# Mercer Spring, Arizona

Mercer Spring in Arizona. 77°F (25°C). Short Walk · Public Land. Pima County.

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

## Can you soak at Mercer Spring?

The water leaves the ground at 77°F, about as warm as a heated pool. It's a short walk from the road. It's on US Forest Service land. We haven't confirmed whether it has a pool or charges a fee.

## Key facts

| Fact | Value |
|---|---|
| Source water temperature | 77°F (25°C) (USGS record; developed pools are often cooled) |
| Elevation | 4,460 ft |
| Access | Short Walk · Public Land, 0.1 mi from the nearest road (North General Hitchcock Highway) |
| Land | Coronado National Forest, US Forest Service |
| County | Pima County |
| Nearest town | Tanque Verde |
| Coordinates | 32.33700, -110.70800 |
| Best months to soak | January, December, February (largest gap between water and average air temperature) |
| Nearest campground | MOLINO, 0.7 mi |

## About Mercer Spring

Mercer Spring is a tepid spring in the Coronado National Forest, Pima County, about five miles from Tanque Verde. The water is in the high seventies, cooler than a bath. Access is open on Forest Service land. Molino campground sits under a mile away. There is a picture on file and no chemistry, and there is a USGS entry for it.

A couple hundred yards off the North General Hitchcock Highway, which the record files under short walk. Forest Service ground, Coronado National Forest. It sits at a fair height, with a yearly average in the low sixties, a little snow some winters and fourteen inches of rain or thereabouts. Molino campground is the closest on file, less than a mile away.

The cold months are the ones on file as best, December through February. Park on the highway side and walk a couple hundred yards. Open access. Molino is the campground, close enough to walk. Nothing is written about fees. The water is cool, well under body heat, so there is no safety concern; the only question is if it feels warm enough to bother with on a given day.

## Nearby

- Nearest city page: [Hot springs near Tucson](https://www.soakingsprings.com/hot-springs/near/arizona/tucson), 16 mi away
- State page: [Hot springs in Arizona](https://www.soakingsprings.com/hot-springs/arizona)
- [Agua Caliente, AZ](https://www.soakingsprings.com/hot-springs/arizona/agua-caliente): 86°F source, TDS 493 mg/L, Roadside, near Tanque Verde, Pima County, not a soaking spring, free, year-round
- [Warm Springs, AZ](https://www.soakingsprings.com/hot-springs/arizona/warm-springs-cochise-county): 91°F source, Roadside, near Benson, Cochise County, private, no public access, overnight guests only
- [Hookers Hot Springs, AZ](https://www.soakingsprings.com/hot-springs/arizona/hookers-hot-springs): 127°F source, pH 9.0, TDS 255 mg/L, Short Walk, near Benson, Cochise County, private, no public access, overnight guests only
- [N O Spring, AZ](https://www.soakingsprings.com/hot-springs/arizona/n-o-spring): 73°F source, Roadside, near Benson, Cochise County
- [Agua Caliente Spring, AZ](https://www.soakingsprings.com/hot-springs/arizona/agua-caliente-spring-1): 90°F source, Roadside, near Arivaca Junction, Pima County
- [Monkey Spring, AZ](https://www.soakingsprings.com/hot-springs/arizona/monkey-spring): 82°F source, Short Walk, near Rio Rico, Santa Cruz County

## Questions

**What is the water temperature at Mercer Spring?**
Mercer Spring has a water temperature of 77°F (25°C). This is a warm thermal spring.

**Where is Mercer Spring located?**
Mercer Spring is located in Pima County, Arizona at 4,460 feet elevation, near Tanque Verde. Coordinates: 32.3370°N, 110.7080°W.

**How do I get to Mercer Spring?**
Mercer Spring has Short Walk road access, with the nearest road being North General Hitchcock Highway (0.1 mi from the road).

**Is Mercer Spring free to visit?**
Mercer Spring has Open access. It is managed by US Forest Service.

**Can I camp near Mercer Spring?**
Yes, Molino is located nearby (0.7 miles away).

## Sources

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