Image via Wikidata
Lava Hot Springs ranks among Idaho's most recognized thermal destinations, a system of geothermal mineral springs that the Shoshone-Bannock tribes used for centuries before the town of the same name grew up around them. The state-managed pools hold 113-degree water at 5,115 feet elevation in Caribou County.
The springs surface in a narrow valley where the Portneuf River cuts through southeastern Idaho's basin-and-range topography. Rounded sage-covered hills rise on either side of the small town, and the mineral-rich water feeds into developed concrete pools of varying temperatures. The air is dry and cool, averaging 45 degrees annually, with 68 inches of snow blanketing the valley in winter. Steam clouds rise from the pools and drift across the highway on cold mornings.
History of Lava Hot Springs
The springs discharge along a fault zone where the Portneuf River has exposed deep geothermal pathways. Water chemistry shows a near-neutral pH of 6.8 with total dissolved solids at 776 milligrams per liter, including substantial calcium, sodium, and chloride. The Shoshone-Bannock people considered these springs neutral ground where warring tribes could bathe peacefully. Idaho designated the springs a state resource, and the foundation that manages them has operated the public pools since the early twentieth century.
The developed pools are roadside in the town of Lava Hot Springs, accessible without any hiking. The town has restaurants and shops within walking distance. Pebble Guard Station, a reservable 1933 Forest Service cabin at the base of Bonneville Peak, sits about 17 miles away for those seeking a rustic overnight. Winter visits offer the best contrast between cold air and hot water, though the pools are open year-round.
Is Lava Hot Springs worth visiting?
Best for
- Hot spring soaking
- Easy day trips
- Overnight camping trips
Lava Hot Springs offers an accessible hot spring experience — great for a day trip.
Annual Precip: 20.0 in
Annual Snow: 68.3 in
December
Air 22°F · Water 113°F · +92° contrast
January
Air 22°F · Water 113°F · +91° contrast
February
Air 25°F · Water 113°F · +88° contrast
December offers 52°F more contrast than July
Recent Temperature
109.4°F
(43.0°C)
Measured May 30, 1991
The water at Lava Hot Springs is neutral (pH 6.8) with 776 mg/L total dissolved solids. It is notably rich in calcium (may support bone density and joint health), magnesium (known for muscle relaxation and stress relief), and chloride (natural antiseptic with skin health benefits).
pH influences mineral absorption through skin
Higher mineral concentration for therapeutic soaking
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
Pebble Guard Station is located at the base of Bonneville Peak along beautiful Pebble Creek, a tributary of the Portneuf River. The rustic one-room cabin offers a secluded retreat on four fenced acres, surrounded by high mountain vistas.
The original Pebble Guard Station was built in 1908. The current structure stands at a higher altitude and was built in 1933.Guests can drive to Pebble Guard Station during warmer months, but it can only be accessed by snowmobile or other snow means...
Reserve on Recreation.gov →
Swimsuit & towel
Water bottle
Stay hydrated, especially in hot water
Camping gear
Nearby camping at Pebble Guard Station
Trash bag
Pack out what you pack in
Water shoes
Hot ground near source
30 miles from Soda Springs, ID
USGS Quad: LAVA HOT SPRINGS 7.5 · PP 492: 190.0 · NOAA: 3.0 · AMS Map: POCATELLO
What is the water temperature at Lava Hot Springs?
Lava Hot Springs has a water temperature of 113°F (45°C). This is considered a hot spring, well above body temperature.
Where is Lava Hot Springs located?
Lava Hot Springs is located in Caribou County, Idaho at 5,115 feet elevation, near Soda Springs. Coordinates: 42.6210°N, 112.0080°W.
How do I get to Lava Hot Springs?
Lava Hot Springs has Roadside road access (157 ft from the road).
Is Lava Hot Springs free to visit?
Lava Hot Springs has Open access. It is managed by OTHS.
Can I camp near Lava Hot Springs?
Yes, Pebble Guard Station is located nearby (10.7 miles away).
What minerals are in the water at Lava Hot Springs?
Water chemistry analysis shows the presence of pH, Total Dissolved Solids, Calcium, Magnesium, Sodium, Sulfate, Chloride, Iron. The pH is 6.8 (neutral). Total dissolved solids measure 776 mg/L.
Is it safe to soak at Lava Hot Springs?
At 113°F, Lava Hot Springs 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 Lava Hot Springs crowded?
Lava Hot Springs is accessible from a paved road, making it easy to reach. Weekends and holidays may be busier — consider visiting on a weekday for a quieter experience.
What should I bring to Lava Hot Springs?
Essentials for Lava Hot Springs: 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.