Fall is the connoisseur’s season for Idaho hot springs: crisp air, golden hillsides, cold rivers and far fewer people at the popular pools. This collection gathers the springs tagged for fall soaking, when steam rises hardest off the water and the backcountry turns gold. Nights turn cold fast and conditions change with the first storms, so check access before you commit to a long drive.
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.
Sheep Creek Bridge Hot Springs is a small, shallow set of rock-walled, tarp-dammed pools a short hike from one of the points where the Middle Fork Road bridges the Boise River, in the Atlanta corridor. It comes with an honest caveat: this spring has declined. The well-built pool documented in early visits was later dismantled, and the most recent accounts describe small silt- and mud-filled pools running lukewarm — a shadow of the soak it once was, though the source still flows and the setting, with river views, remains.
Phifer Warm Spring — also known as Weatherby Mill — is one of the Atlanta area’s oddities: an 86°F warm spring with no soaking pool at all. Instead, the water is piped into a stand-up shower stall and an old bathtub, making this a rinse-off stop rather than a soak — best enjoyed on a hot summer day, when the lukewarm water is a feature instead of a bug.
Pete Creek Hot Springs is built around a sight worth the trip by itself: a hot waterfall pouring into the Middle Fork Boise River in the Atlanta area. The soak — small, user-built rock pools below the falls on the far side of the river — exists only seasonally, roughly August through October when the river runs low. On documented visits outside that window there were no pools at all, just the falls and a cold river crossing, so time this one carefully.
Ninemeyer Hot Springs is a late-season-only proposition on the far side of the Middle Fork Boise River: rocky, user-built pools with sand and rock bottoms that sit submerged or unreachable for most of the year. The access window is small — fording the river is only advised at low water, usually late July through November — and on multiple documented visits the pools were only ever seen steaming from the wrong side of a swollen river.
Loftus Hot Springs is a pair of user-built rock pools along the Middle Fork Boise River Road — famous, heavily used, and with a rough recent history: the pools were destroyed by vandals in 2011 and rebuilt by local soak seekers, in reduced form, later that year. The upper pool (102°F, mortar-reinforced) and lower pool (100°F) sit right off the washboard road between Boise and Atlanta, and usage here is extreme — this is a known party spot for hunters and ATVers, kegs and all. Two cautions from the listing itself: watch for broken glass in the pools, and poison ivy grows around them.
Granite Creek Hot Springs is a seasonal riverside soak right next to the Middle Fork Road in the Atlanta area — a set of rock-walled pools with sand, gravel, and rock bottoms at the edge of the Middle Fork Boise River. Finding the right spot can be tricky: there may or may not be a pool ready depending on when you visit, and the pools that exist swirl hot and cold water together, so a good soak takes a little work.
Roaring River Hot Springs — also known as Dutch Frank — is a sprawling geothermal complex where the Roaring River meets the Middle Fork Boise River in the Boise National Forest’s Mountain Home District. Heat emanates from multiple spots along the river, and roadside rock-walled pools appear wherever soakers have dug them. It’s a prospector’s soak: there may or may not be something worthwhile ready when you arrive, but the opportunity is everywhere.
Chattanooga Hot Springs is one of the finest natural soaks in the Atlanta area: a large, shallow, waterfall-fed pool beside the Middle Fork Boise River near the town of Atlanta, Idaho. The catch is timing — depending on how strong spring runoff runs, the pool can sit submerged in the river. Come late season, when the river drops, and this 102°F soak is tough to beat. Red spider mites have been reported here, so keep gear off the rocks.
Browns Creek Hot Springs hides on the far side of the Middle Fork Boise River in the Atlanta area — and the river is the gatekeeper. A deep, cold ford that should only be attempted at low water (usually August) guards a small set of shallow seasonal pools, a roughly 30-foot hot waterfall shower, and one secret two-person rock-and-mortar soaker tucked into a nook in the rocks, the only pool out of view of the road.
Atlanta Annex 1 & 2 are two undeveloped hot springs along the road near Atlanta, Idaho, sitting between three of the best soaks in the area — Atlanta, Chattanooga, and Powerplant. Each has a large pool with enough hot water flowing to support development, but they remain unbuilt, highly visible from the road, and frankly outclassed by their neighbors.
Atlanta Hot Springs is the hometown soak of Atlanta, Idaho: one large rock-and-mortar pool with benches and piped-in hot and cold water, in the Boise National Forest near the old mining town. It is wildly popular with locals — expect company, and expect it to be used hard. One caution is documented right on the listing: red spider mites inhabit this hot spring, so keep clothing and towels off the rocks.
Deadwood Hot Springs is a true jewel of the Boise National Forest: three pools — two small, one a large cliff-hanger soaker on a granite ledge above Warm Springs Creek — at the end of an approximately 3-mile hike from Deadwood Reservoir, northwest of Lowman, Idaho. The sources emerge through fissures all over a huge granite outcropping rising straight out of the creek.
Upper Loon Hot Springs is a complex of four separate hot spring sources strung along the Loon Creek Trail in the Frank Church–River of No Return Wilderness, passed in consecutive order as you trek up Loon Creek toward Warm Springs Creek. With everything from a two-person soaker to a 10–15 person pool fed by a hot waterfall, it’s one of the finest backpacking soaks in Idaho — reachable only in a short summer-to-fall window.
Tenmile Hot Springs is a set of user-built rock pools in the Boise National Forest in the Lowman area, in a grassy, picturesque setting with excellent camping and hiking around it. The honest catch is in the pools themselves: the water temperature is perfect, but the pools are mucky — loaded with silt and algae — and a good soak here takes patience and elbow grease.
Sunbeam Hot Springs is a set of riverside, rock-walled pools just off Highway 75 near Sunbeam, Idaho, below the historic Sunbeam bathhouse on the Salmon River. It’s one of the most popular public soaks in the Stanley area — heavy use, extreme in summer — and one of the rare non-commercial hot springs with a restroom and changing room.
