Winter is when Idaho hot springs turn magical: steam rolling off the water, snow piled on the rocks, and a hot pool all to yourself. This collection gathers the springs tagged for winter soaking, from plowed road resorts to natural pools that stay reachable in the cold months. Access is the whole game in winter, so check road conditions and daylight before you go, and never let a soak leave you driving an icy canyon road after dark.
Zims Hot Springs is a Nez Perce Tribe-operated hot springs a few miles outside New Meadows, Idaho, with outdoor mineral pools fed by an artesian well — a small pool at 100–105°F and a large pool at 90–100°F. Day use is $13 for adults, $8 for children, and $10 for seniors, with RV parking and camping on site.
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.
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.
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.
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.
