File:San Antonio Hot Springs (21825385363).jpg — cc by 2.0
San Antonio Hot Spring emerges at 129°F in the Santa Fe National Forest at 8,369 feet, producing water 83.7°F above the local annual average — one of the largest thermal differentials in New Mexico. The water is remarkably pure: low in dissolved minerals with just 23 mg/L sodium and 2.3 mg/L chloride at pH 7.7.
The spring sits high in the Jemez Mountains within the Santa Fe National Forest, surrounded by dense mixed-conifer forest of spruce, fir, and aspen. At 8,369 feet, the area receives 21 inches of rain and 56 inches of snow annually. The San Antonio Creek drainage runs nearby through a steep volcanic canyon, and the Valles Caldera — a 13-mile-wide volcanic depression — lies just to the east. Rhyolite cliffs and tuff formations from the Jemez volcanic field shape the surrounding terrain.
History of San Antonio Hot Spring
San Antonio Hot Spring is part of the Jemez volcanic hydrothermal system fed by the Valles Caldera magma chamber. The spring has drawn bathers for generations, and the Forest Service manages it as an open-access recreation site within the national forest. Multiple soaking pools at the source have been informally constructed by visitors over the years. San Antonio Campground, built along the San Antonio River at 7,600 feet, was completely rebuilt and reopened in 2010.
A 358-meter trail leads from the road to the spring. The forest road may be closed November through May due to snow at 8,369 feet. Summer and early fall provide the most reliable access. Water temperature at the source reaches 129°F — test carefully before entering, as pools vary in temperature. San Antonio Campground, 5.7 km away, is reservable and open May through October. A high-clearance vehicle is recommended for forest roads.
Is San Antonio Hot Spring worth visiting?
Best for
- Hot spring soaking
- Overnight camping trips
San Antonio Hot Spring is well suited for hot spring soaking and overnight camping trips.
Annual Precip: 21.4 in
Annual Snow: 56.1 in
January
Air 25°F · Water 129°F · +104° contrast
December
Air 26°F · Water 129°F · +104° contrast
February
Air 28°F · Water 129°F · +101° contrast
January offers 41°F more contrast than July
Recent Temperature
104.0°F
(40.0°C)
Measured May 16, 1973
The water at San Antonio Hot Spring is slightly alkaline (pH 7.7).
pH influences mineral absorption through skin
May support bone density and joint health
Known for muscle relaxation and stress relief
Supports circulation and skin hydration
Traditionally used for skin conditions and inflammation
Natural antiseptic with skin health benefits
Iron-rich springs may support circulation
Overview
San Antonio Campground is adjacent to the San Antonio River, tucked into a forest of ponderosa pine at 7,600 feet above sea level. This popular campground is open from May through October in the Santa Fe National Forest. Visitors should be prepared for hot summer days and cool nights.
San Antonio Campground was completely rebuilt and reopened in August 2010. It is designated as a reduced impact and recycle campground.Recreation
A paved walking trail along the river provides access f...
Reserve on Recreation.gov →
Swimsuit & towel
Water bottle
Stay hydrated, especially in hot water
Camping gear
Nearby camping at San Antonio Campground
Trash bag
Pack out what you pack in
Water shoes
Hot ground near source
0 miles from Santa Teresa, NM
USGS Quad: SEVEN SPRINGS 7.5 · PP 492: 10.0 · NOAA: 2.0 · AMS Map: ALBUQUERQUE
What is the water temperature at San Antonio Hot Spring?
San Antonio Hot Spring has a water temperature of 129°F (54°C). This is considered a hot spring, well above body temperature.
Where is San Antonio Hot Spring located?
San Antonio Hot Spring is located in Rio Arriba County, New Mexico at 8,369 feet elevation, near Santa Teresa. Coordinates: 35.9380°N, 106.6460°W.
How do I get to San Antonio Hot Spring?
San Antonio Hot Spring has Short Walk road access (0.2 mi from the road).
Is San Antonio Hot Spring free to visit?
San Antonio Hot Spring has Open access. It is managed by US Forest Service.
Can I camp near San Antonio Hot Spring?
Yes, San Antonio Campground is located nearby (3.5 miles away).
What minerals are in the water at San Antonio Hot Spring?
Water chemistry analysis shows the presence of pH, Calcium, Magnesium, Sodium, Sulfate, Chloride, Iron. The pH is 7.7 (slightly alkaline).
Is it safe to soak at San Antonio Hot Spring?
At 129°F, San Antonio Hot Spring is hot enough to require caution. Enter slowly, limit soaking sessions to 15–20 minutes, and stay hydrated. Always tell someone your plans before visiting remote hot springs.
Is San Antonio Hot Spring crowded?
San Antonio Hot Spring sees varying levels of visitors depending on the season and day of the week.
What should I bring to San Antonio Hot Spring?
Essentials for San Antonio Hot Spring: swimsuit, towel, water bottle, camping gear, a trash bag to pack out what you pack in. The water is over 110°F — test the temperature before entering and watch for scalding near the source.