# San Antonio Warm Spring, New Mexico

San Antonio Warm Spring in New Mexico. 101°F (38°C). Roadside · Public Land. Rio Arriba County.

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

## Can you soak at San Antonio Warm Spring?

The water leaves the ground at 101°F, a comfortable soaking temperature. You can drive right up to it. It's on National Park Service land. We haven't confirmed whether it has a pool or charges a fee.

## Key facts

| Fact | Value |
|---|---|
| Source water temperature | 101°F (38°C) (USGS record; developed pools are often cooled) |
| pH | 6.7 (Slightly Acidic) |
| Elevation | 8,431 ft |
| Access | Roadside · Public Land, 144 ft from the nearest road |
| Land | Valles Caldera National Preserve, National Park Service |
| County | Rio Arriba County |
| Nearest town | Santa Teresa |
| Coordinates | 35.97200, -106.56000 |
| Best months to soak | January, December, February (largest gap between water and average air temperature) |
| Nearest campground | SAN ANTONIO CAMPGROUND, 7.6 mi |

## About San Antonio Warm Spring

Inside Valles Caldera National Preserve, on National Park Service ground in Rio Arriba County, San Antonio Warm Spring runs soaking warm, a touch over body heat, and the record shows public access as open. The nearest town on file is Santa Teresa, which the record puts nearly three hundred miles away, so that entry is no help for planning. A photo exists.

High mountain country, over eight thousand feet, with deep winter snow and a wet year. The road is close, under fifty yards, so the approach is roadside. The land designation is National Conservation Area. San Antonio Campground is around eight miles away. Average temperatures are cold. No fee appears on the record.

Valles Caldera National Preserve surrounds it. The Park Service runs the unit, though the designation attached to it reads National Conservation Area. USGS surveyors sampled the spring in 1947 and logged it as thermal.

On paper the best months run through the heart of winter, though the snow totals say summer and fall are when the road is open. Camp at San Antonio Campground. The preserve is National Park Service land; check its rules and any entry fee, since none is recorded here. The sample is from 1947, the oldest kind of figure, so do not bank on the temperature.

## Water chemistry

Lab sample from 1947-08-01 (Water Quality Portal).

| Measure | Value |
|---|---|
| pH | 6.7 |
| Calcium | 7 mg/L |
| Magnesium | 1 mg/L |
| Sulfate | 15 mg/L |
| Chloride | 17 mg/L |

## Nearby

- Nearest city page: [Hot springs near Española](https://www.soakingsprings.com/hot-springs/near/new-mexico/espanola), 28 mi away
- State page: [Hot springs in New Mexico](https://www.soakingsprings.com/hot-springs/new-mexico)
- [San Antonio Hot Spring, NM](https://www.soakingsprings.com/hot-springs/new-mexico/san-antonio-hot-spring): 129°F source, pH 7.7, Short Walk, near Santa Teresa, Rio Arriba County
- [Sulphur Springs, NM](https://www.soakingsprings.com/hot-springs/new-mexico/sulphur-springs-3): 189°F source, pH 1.9, TDS 1,730 mg/L, Short Walk, near Santa Teresa, Rio Arriba County
- [Spence Hot Springs, NM](https://www.soakingsprings.com/hot-springs/new-mexico/spence-hot-springs): 100°F source, pH 7.3, TDS 224 mg/L, Short Walk, near Jemez Pueblo, Sandoval County
- [Mccauley Hot Springs, NM](https://www.soakingsprings.com/hot-springs/new-mexico/mccauley-hot-springs): 99°F source, pH 8.0, Short Walk, near Jemez Pueblo, Sandoval County
- [Soda Dam Hot Springs, NM](https://www.soakingsprings.com/hot-springs/new-mexico/soda-dam-hot-springs): 117°F source, pH 7.0, Short Walk, near Jemez Pueblo, Sandoval County
- [Jemez Springs, NM](https://www.soakingsprings.com/hot-springs/new-mexico/jemez-springs): 169°F source, pH 7.3, Roadside, near Jemez Pueblo, Sandoval County

## Questions

**What is the water temperature at San Antonio Warm Spring?**
San Antonio Warm Spring has a water temperature of 101°F (38°C). This is considered a hot spring, well above body temperature.

**Where is San Antonio Warm Spring located?**
San Antonio Warm Spring is located in Rio Arriba County, New Mexico at 8,431 feet elevation, near Santa Teresa. Coordinates: 35.9720°N, 106.5600°W.

**How do I get to San Antonio Warm Spring?**
San Antonio Warm Spring has Roadside road access (144 ft from the road).

**Is San Antonio Warm Spring free to visit?**
San Antonio Warm Spring has Open access. It is managed by National Park Service.

**Can I camp near San Antonio Warm Spring?**
Yes, San Antonio Campground is located nearby (7.6 miles away).

**What minerals are in the water at San Antonio Warm Spring?**
Water chemistry analysis shows the presence of pH, Calcium, Magnesium, 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