Lava Hot Springs
430 E Main St
Lava Hot Springs, ID
A tiny town built around naturally hot, odorless mineral pools that the Shoshone-Bannock have called medicine water for generations, with a lazy tubing river running right through the middle.
Lava Hot Springs is one of those places where the ground does the work. Deep beneath the Portneuf River valley, rainwater sinks thousands of feet, gets heated by the earth, and rises back to the surface at a steady 102 to 112 degrees, laden with minerals and, unusually, entirely free of the rotten-egg sulfur smell most hot springs carry.
For countless generations the Shoshone-Bannock people have known these springs as Poha-Ba, or medicine water, a place of healing and renewal, and by tradition neutral ground where even rival groups could bathe in peace. Today the springs anchor a small town that has turned the valley into one of Idaho's most beloved soaking destinations.
What Guests Love
- Soaking in a chain of naturally hot mineral pools that stay warm year round and, unlike many hot springs, have no sulfur smell
- Floating and tubing the Portneuf River right through the center of town on a hot summer day
- The mix of a genuine geothermal wonder with a friendly, low-key small-town feel
- A soak under falling snow in winter, with the steam rising off the pools
Worth Knowing
- The main hot pools and the summer water park are separate facilities, so check which one fits your plans
- River tubing is a warm-season activity and the Portneuf can run fast in early summer, so mind the current and the takeout
- This is a popular getaway, so weekends and holidays fill up
- The pools stay open through winter and are wonderful in cold weather, but the tubing does not
Details
Lava Hot Springs, ID
Learn about Lava Hot Springs
The springs and their keepers
The Shoshone-Bannock relationship with these waters is the oldest chapter of the story and a living one, honored in the name Poha-Ba and in the tradition of the springs as peaceful, shared ground. Their descendants remain a present community in southeast Idaho.
As settlers arrived, the reputation of the healing waters spread, and the town grew up specifically to share them. The pools are managed today as a public facility, which keeps them accessible rather than locked behind a single resort.
How the water gets hot
The heat is geothermal, not volcanic in the erupting sense. Rain and snowmelt seep down through cracks in the rock to depths of roughly eight to ten thousand feet, where the earth's interior warms the water in underground reservoirs.
Pressure then pushes that hot water back to the surface, where it emerges at a remarkably constant temperature. Because the water moves through mineral-rich rock rather than sulfur beds, it comes out clean and odorless, which is a large part of the appeal.
The river and the seasons
In summer the Portneuf River becomes the town's second attraction, a gentle float that carries tubers right past the shops and under the bridges. It is a rite of a southeast Idaho summer.
Winter flips the mood entirely. The tubing river goes quiet, but the hot pools become their best, wreathed in steam while snow falls around them. Spring and fall are the quiet shoulder seasons, good for a soak without the crowds.
The town and the valley
For all its fame, Lava Hot Springs is a genuinely small town, its main street lined with cafes, ice cream stops, and shops within easy walking distance of the pools. That compactness is part of the charm, since you can soak, eat, and wander without ever getting in the car.
The setting helps too. The Portneuf River valley narrows here between lava-rock hills, and the surrounding southeast Idaho country of ranchland, mountains, and back roads rewards a slow exploration once you have had your soak.
Closest Boutels
The closest Boutel™ stays, so you can turn this stop into an overnight. Each is an independently owned, editorially selected place to stay.
Things to Do Near Lava Hot Springs
Portneuf River tubing
Through town
A lazy summer float down the Portneuf that runs through the middle of Lava Hot Springs, with rental tubes and a shuttle in season.
Hooper Spring
About 25 miles east
A naturally carbonated cold spring near Soda Springs where you can taste the fizzy mineral water straight from the source.
Pocatello
About 35 miles northwest
Southeast Idaho's largest city, home to the Idaho Museum of Natural History and the historic Old Town district.