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Bronco Billy Hot Springs — also known as Deer Creek — is a cautionary tale along the Banks-Lowman Highway in the Boise National Forest, in the Banks/Garden Valley area. The honest summary: the source pool is far too hot to soak, and the second pool below the highway has been gone since a 1996 mudslide. Most visitors look, and keep driving.

West Pass Hot Springs is a trio of bathtubs soaking beside West Pass Creek in the Sawtooth National Forest, near Clayton on the East Fork of the Salmon River. It’s a quirky, low-use soak — clear, lime-tinted, moderately sulfurous water in plain tubs, in a white-rock canyon that sees very few visitors.

Bowery Hot Springs is one of Idaho’s most unusual soaks: the “pool” is an old fiberglass spa set beside the East Fork of the Salmon River in the Sawtooth National Forest, near Clayton. There is no natural rock pool here — just an aging spa tub, strong sulfur water, big scenery, and (usually) nobody else around.

Hot Springs Landing — also called Magic Valley — is a reservoir-side soak in the Fairfield area, on BLM land where the spring’s source itself sits on private land. Most of the year there’s nothing to soak in: the pool site lies under the reservoir’s water until late fall, when dropping levels expose a wood-framed, tarp-lined pool a few yards downstream of the source, big enough for two to four soakers.

Willow Creek Hot Springs is a chain of algae- and silt-laden pools along Willow Creek and the Idaho Centennial Trail in the Sawtooth National Forest, just under a mile’s hike from a horse transfer camp northeast of Pine and Featherville, Idaho. It is also a comeback story: the area burned hard in a 2008 wildfire and the pools vanished for years — by June 2013 they were back, soaking a recovering, still-scorched landscape.

Lightfoot Hot Springs is a neglected, rarely visited soak about 20 miles from Featherville in the Sawtooth National Forest — and it starts with a trap for the unwary: the signed pools beside the road are a decoy. The real Lightfoot pools lie on the far side of the South Fork Boise River, reached by a dirt forest road, a pack bridge, and a short hike (or a river ford, not advised during spring runoff). What waits there, on the only documented visit, was underwhelming: stagnant, dirt-lined pools in a weed-infested area, badly in need of reconstruction.

Bridge Hot Springs — also known as Elk Flats — takes its name from its setting: user-built pools on both sides of the South Fork Boise River, beneath the bridge just before Featherville, Idaho. A popular campground within walking distance supplies most of the soakers, and late summer is both the busiest and the best time: the pools submerge during spring runoff and can run too cool early in the season, so the dependable soaks come once the river drops.

Baumgartner Hot Springs is the Featherville area’s developed soak: a commercial-style concrete pool inside Baumgartner Campground on the South Fork Boise River, about 11 miles east of Featherville in the Sawtooth National Forest. The 101°F water is piped into a 15×20-foot concrete pool with steps, a railing, and filters — and it is drained, cleaned, and refilled every morning during the season. Usage is extreme and families pack it; the standing local advice is simple: soak early.

Round the Bend Hot Spring is exactly what the name says: the steaming cliff face just around the bend from Ninemeyer on the Middle Fork Boise River. It is also, honestly, not a soak in the usual sense — there is no pool here at all. Hot water streaked with bright algae flows down a cliff straight into the river, and the only way to enjoy it is to wade in during late summer, when the river drops to about 3 feet deep, and find the seam where hot meets cold.

Smith’s Cabin Hot Springs is a trio of undeveloped hot springs — numbered 1, 2, and 3 — strung along both sides of the Middle Fork Boise River near Troutdale Campground in the Atlanta corridor. All three are filed under “potential”: the first sits on the road side of the river, the second across the river slightly upstream, and the third about 100 yards further up, originating roughly 20 yards above the river. On documented visits, soaking pools were marginal or absent entirely — this is a stop for spring hunters already working the corridor, not a destination soak.