Some Idaho hot springs are at their best in summer, when high country trails are clear, rivers run at soakable levels, and long evenings stretch the day. This collection gathers the springs tagged for summer visits, from roadside pools to backcountry soaks reached on foot. Summer is also the busiest season at the popular spots, so start early, pack more water than you think you need, and check fire and road conditions before you go.
Boiling Springs Hot Springs sits beside the historic Boiling Springs Guard Station at the end of a forest road north of Crouch, Idaho, in the Boise National Forest. Its rock-walled pools are fed by one of the most powerful geothermal sources in the Garden Valley backcountry.
Twin Springs Resort is a rustic, off-grid hot springs resort on the Middle Fork of the Boise River northeast of Boise, established in 1898. Riverfront cabins from $160 per night each have a private hot tub, with a shared sauna for guests.
Silver Creek Plunge is a remote mountain hot springs resort in the Boise National Forest north of Crouch, Idaho, built around a large geothermal pool kept near 100°F. Cabins, A-frames and campsites make it a Garden Valley base camp; day swim is $15 for adults.
Gold Fork Hot Springs is a commercial hot springs near Donnelly, Idaho, with 6 natural mineral pools — including a soft white-sand-bottom pool — fed by alkaline, lithium-rich water. Admission is $15 per person (cash only, 2-hour maximum stay); open year-round, closed Tuesdays.
Bonneville Hot Springs is a natural hot springs in the Boise National Forest, 19 miles southeast of Lowman, Idaho, reached by a 0.25-mile trail along Warm Springs Creek. User-built rock-walled pools and a private soak shack with a cast-iron bathtub sit below the Bonneville Campground.
Fire Crew Hot Springs is a set of user-built, rock-walled soaking pools on the Middle Fork of the Payette River in the Boise National Forest, north of Crouch, Idaho. The road is snow-covered until about late May, and the pools submerge during spring runoff.
Kirkham Hot Springs is a popular Forest Service hot springs on the South Fork of the Payette River near Lowman, Idaho, known for its shallow rock pools and hot waterfalls. Day use is free; the site is open 7 AM–9 PM with no overnight camping.
Rocky Canyon Hot Springs is a series of tiered, user-built pools on the far bank of the Middle Fork of the Payette River, north of Crouch, Idaho. Reaching them requires a cold ford of the river; the pools are best after spring runoff.
Miracle Hot Springs is a hot springs resort near Buhl, Idaho, on Highway 30 south of Hagerman, with multiple large general admission geothermal pools plus many private hot pools with adjustable temperatures. General admission starts at $14, private pools from $10, and VIP pools from $25.
Pine Flats Hot Springs is a string of natural hot pools beside the South Fork of the Payette River near Lowman, Idaho, reached by a 0.25 to 0.75-mile hike from Pine Flats Campground. The pools are usable all winter.
Campground Hot Springs is a roadside soak on the South Fork of the Payette River, across the Banks-Lowman Highway from Hot Springs Campground east of Garden Valley, Idaho. Its main rock-lined pool runs about 110°F, reached by a staircase from the road.
Little Anderson Hot Springs, near Garden Valley, Idaho, was once a stellar, locally kept soak in the Boise National Forest. Today the pool and primitive sites are heavily damaged by ATV use and trash; visit with low expectations.
Roystone Hot Springs is a reservation-only hot springs, RV park, and event center in Sweet, Idaho, about 45 minutes from the Treasure Valley. Every soak is private to the reserving group; the pool runs 93–98°F and the jetted hot tub about 104°F.
The Springs is a hot springs resort on Highway 21 near Idaho City, Idaho, with a 40′ x 80′ geothermal pool, a 104° hot tub, a steam room, massage services, and private tubs. Soak sessions run $30 for adults and $27 for children; reservations are required.
