Sunbeam Hot Springs

Sunbeam sits right on Highway 75 where the road runs beside the upper Salmon River, the long, wild stretch that early travelers named the River of No Return because its rapids let boats go down but not back up. Hot mineral water emerges on the slope above the road and flows down toward the river, and over the years bathers have shaped rock pools along the bank to catch it.

The soak is a mixing act. Straight from the source the water can be scalding, so the trick is to build or borrow a pool close enough to the river to let in a little cold current, then sit where the two blend. It is a rustic, changeable experience, different every season as the river rises and falls, and entirely free.

The Lemhi-Shoshone people have come to these springs for generations to soak and to treat illness, part of a long relationship with the Salmon River country that continues today through their descendants in the region's Shoshone-Bannock community. This was a known place of healing water well before any map marked it.

The first written account came in October 1821, when a party of Hudson's Bay Company fur trappers led by Alexander Ross recorded a boiling fountain in the canyon, later understood to be Sunbeam. Trappers, miners bound for the Yankee Fork gold camps, and travelers all passed this way in the century that followed.

In 1937, enrollees from the nearby Clayton camp of the Civilian Conservation Corps built a bathhouse here on a walled concrete platform above the river, with stairways down from the road and a clever plumbing scheme. Hot water was piped toward the river inside a line that ran through the cold current, so the river itself cooled the water on its way to the tubs.

The bathhouse only worked for a few years. Staffing and maintenance money dried up during the war, and it slowly fell into ruin. The Forest Service has kept the stone shell standing as a tribute to Depression-era craftsmanship, so today you can walk up to the roofless walls, read the interpretive signs, and then go find your soak down at the water.

Sunbeam is deep in the Sawtooth country, where the Salmon River threads a steep, forested canyon below granite peaks. The water in this river was once thick with returning chinook salmon and steelhead that swam nearly a thousand miles from the Pacific to spawn, and though the runs are a shadow of what they were, the river remains one of the great wild corridors of the West.

Timing matters here. In spring and early summer the snowmelt swells the Salmon and can bury the riverside pools entirely, so the most dependable soaking is from late summer into fall, when the water drops. The road is plowed but the canyon is cold and snowy in winter, and a soak with steam rising into the frosty air is its own reward for those who brave it.

The closest Boutel™ stays, so you can turn this stop into an overnight. Each is an independently owned, editorially selected place to stay.