Remote desert spring near CA-190 with a concrete pool and warm outflow, short walk from a pullout; no services, bring your water, and leave no trace.

Single concrete tub on a windy hill near Mammoth Lakes with wide caldera views, reached by a short walk; simple soaking with no facilities or shade.

Historic roadside hot spring site near Bridgeport with a small concrete soaking pool fed by mineral water; access is private, confirm permission first.

Large clothing optional pools reached by a short boardwalk near Crowley and Mammoth Lakes, with open meadow views, no services, and pack-out required.

Paso Robles hot springs with a large warm swimming pond, small hot tub areas, picnic-style day visits near Creston, and an easy drive-in dirt road approach.

Boutique Calistoga hot springs hotel with indoor mineral pool, two hot tubs, and guided mud baths; quiet pool access ties to stays or spa bookings.

Adult-only mineral pools and oasis tubs at Azure Palm in Desert Hot Springs, 15 minutes from Palm Springs, with onsite lockers and day-pass access.

Tecopa desert resort with multiple mineral pools and private bathhouses, drive-up access, quiet nights, and adults-only lodging; book ahead in season.

55+ Desert Hot Springs RV resort with six mineral pools and spas, drive-up access, restrooms and showers; confirm day-use access before you go today.

Coastal hillside resort near Avila Beach with private open-air mineral hot tubs you reserve by the hour, plus spa treatments and garden dining on site.

Calistoga resort with three geothermal mineral pools, mud bath spa, and gated garden setting, walkable from downtown with day use or overnight stays.

Historic Calistoga resort with spring-fed mineral pools and mud-bath spa, walkable from downtown, with clear rules and ADA-listed access features.

Urban Japanese-style bathhouse on Eddy Street with reserved soak sessions, co-ed swimsuit-required bathing, sauna and steam, plus lockers and towels.

Adults-only desert mineral pools at Jacumba Hot Springs Resort near the border, with day passes, lockers, and swimsuit-required soaking on site here.

Two concrete soaking tubs and a warm lagoon shaded by palms on BLM land near Holtville, reached by car on Evan Hewes Hwy, with posted day-use rules.

Desert RV resort near Niland with 14 mineral soaking tubs plus pools, drive-up access, showers and hookups, and seasonal day passes for visitors.

Desert RV resort near Niland with mineral pools and bathhouses on site, drive up access, restrooms and showers, and a 55+ focus; day use may be offered.

State park hot spring pools tucked in a shady creek near the Gaviota Peak trail, reached by a short hike, with sulfur smell and no facilities; pack out trash.

Free, clothing optional pools reached by a short boardwalk near Mammoth Lakes, with open meadow views, no facilities, and basic pack out expectations.

Private desert mineral baths and pools at an RV resort near Niland, with swimsuit required soaking areas and amenities for overnight guests and visitors.

Compact rock-lined tub near Crowley Lake, steps from Whitmore Tubs Road parking. Hot water mixes fast, so test spots, expect crowds and wind most days.

Small cement tub with piped hot water on BLM land off Benton Crossing Road near Mammoth. Short walk from parking, open views, often busy. Bring water shoes.

Backcountry hot spring pools on Agua Caliente Creek in Los Padres NF. Access can be closed; reach is a long hike or rough road, no services. Plan ahead.

Family resort near Avila Beach with a mineral soaking pool plus a separate swim pool and slides. Day passes, showers, and easy parking off Hwy 101.

Active geothermal field near Milford with vents, mud pots, and altered ground. View from public roads only; most areas fenced, no soaking. Bring water.

Private, member-only lake in Bluffdale with a small mineral hot spring pool for booked events. Easy drive-in access, bring swimsuit, towel, ID, sandals.

Three concrete roadside tubs on UT-83 near Corinne with strong sulfur smell and very hot water. Quick stop with safety tradeoffs, bring sandals or shoes.

Desert spring-fed ponds with a boardwalk in Horseshoe Springs WMA near Skull Valley. Good for birds and history, not set up for bathing or soaking.

Crystal-clear warm spring creek with a small rock-lined pool and shallow cascades near Gandy. Remote dirt-road access, bring water shoes and supplies.

Spring-fed pool in a private canyon near Veyo with day passes, picnic areas, and camping. Easy parking, bring sandals, towel, and sun layer on hot days.

Private RV park resort in Garland with two large mineral pools and day pass options. Drive in, check in at office, and soak with showers nearby often.

Three concrete roadside tubs near Corinne with strong sulfur odor and very hot mineral water. Park steps away, soak briefly, bring sandals and water.

Small travertine pools fed by a piped source on the red hillside east of Monroe. Quick walk from parking, plus a pit toilet and open valley views.

Riverside travertine pools at Timpoweap Canyon near La Verkin. Access is often restricted, so verify status before going and bring sandals and water.

Small riverside seeps at the mouth of Ogden Canyon, reached by a short walk and an Ogden River crossing. Go only at safe flows, wear grippy shoes.

Private hillside soak with cast iron tubs and small pools near Monroe, part of Mystic Hot Springs. Reserve ahead, bring sandals, towel, and layers.

City park access to small lakeside soaking pools near Utah Lake. Short walk from Inlet Park parking, best at low wind; bring towel, water, sandals.

Creekside soaking pools reached via the Fifth Water trail from Three Forks. Moderate hike, busy on weekends; bring water and traction for slick rock.

RV park resort with two outdoor mineral pools in Garland, plus full hookups. Easy drive-in soaking with showers, posted hours, and staff on site.

Remote desert tubs fed by a bubbling source, reached by graded dirt roads near Delta. Bring water, pack out trash, and soak at your pace, year round.

Soak site at the Gardner River mixing zone near Mammoth that remains closed after 2022 floods, reached by a short riverside trail when accessible.

Free indoor mineral soaking tubs at the State Bath House in Thermopolis, with attendants, simple rules, and easy access inside Hot Springs State Park.

Concrete pool fed by Kelly Warm Spring near the Gros Ventre River, easy roadside access, mixed hot and cold water, and simple pack-in, pack-out use.

Designated Firehole Canyon river swim spot warmed by geothermal inflow, reached by stairs and boardwalk, with changing currents and limited parking.

Small forest side hot pools near Flagg Ranch reached by a short, mostly flat walk, with muddy bottoms and water levels that shift after rain or snowmelt.

Riverside soaking near Flagg Ranch with small natural pools fed by hot seepage, reached by a short trail and easy to cool off in the Snake River.

Resort style outdoor mineral pools and small private tubs in Saratoga, Wyoming, with easy parking and nearby lodging for a simple day soak or stay.

Campground in Thermopolis with an on site mineral hot pool, day use option, and quick highway access for RV and cabin guests, simple and no hike.

Boutique lodging and RV park in Hot Springs with private mineral soaking tubs by reservation, a quiet in town base for easy soaking between drives and hikes.

Rustic soaking property near Hot Springs with multiple outdoor pools and private tubs fed by Mother Dragon geyser, reached by car for an easy soak stay.

Downtown White Sulphur Springs motel with three mineral pools, drained and refilled nightly, giving an easy, simple soak stop on US 89 and US 12 trips.

Private lodge rental near Hamilton with on site mineral pools and hot tubs, offering exclusive soaking for groups after Bitterroot Valley hikes nearby.

Prairie resort west of Saco with geothermal pools, lodging, and a campground, offering an easy drive up soak and warm indoor options in wintertime.

Small town plunge pool in Hot Springs with mineral water and a simple deck, good for a quick soak stop when you want easy in and out access near town.

Remote cabin rental outside Pony with exclusive access to mineral hot spring pools and sauna, reached by a mountain drive for a private soak stay.

Private cabin and dome stays near Whitehall with geothermal fed hot tubs at each unit, giving a quiet soak after trail rides and nearby I-90 day trips.

Hidden warm spring pool beside I-90 near Bearmouth and Clinton, reached by a short walk from fishing access, good for quick summer dips in clear water.

Private developed soak south of Darby with cabins and an outdoor pool on Medicine Springs Road, best for arranged stays and calm recovery after hikes.

Remote guest ranch in the Sun River headwaters with a private geothermal pool for overnight guests, reached by boat and backcountry travel from Augusta.

Huge natural warm spring swim hole on a private ranch near Lewistown, with cool clear water, picnic tables, and a short walk from parking for summer day use.

Rustic resort near Polaris with two outdoor mineral pools and an indoor sauna area, offering an easy drive up soak base for Pioneer Mountains trips.

Developed pools by the Yellowstone River near Gardiner, using historic Corwin and La Duke waters for an easy, drive up soak near the North Entrance.

Rustic off grid soak near Hot Springs with private tubs and larger pools fed by Mother Dragon geyser, plus camping and cabins reached by car access.

Basic outdoor concrete pool in Hot Springs on the Flathead Reservation, with drive up parking, an honor box fee, and a straightforward soak for groups.

Riverside soak spot near Gardiner at Yellowstone's north entrance, where hot runoff once met the Gardner River; swimming is currently not possible.

Simple outdoor concrete pool at Camas Hot Springs on the Flathead Reservation, close to town with an honor box fee and straightforward parking access.

Vintage motel style soak in Hot Springs with indoor pools and cabins on site, practical base for a steady soak after day trips along Highway 28 near town.

Technical Boy Scout Canyon route near Hoover Dam with long rope descents to small hot pools, no maintained gear, extreme heat risk, remote exit. Go prepared.

Hot spring meadow at Black Rock Point near Gerlach, with very hot source water and small pools that shift with maintenance and runoff, remote desert access.

Primitive concrete pool by Bishop Creek near Wells, reached by a mellow walk on an old road, clothing optional, no services, water temp varies seasonally.

Remote ranchside pools near Denio on the Nevada-Oregon border, fed by very hot springs into mixed basins, clothing optional, no services. Bring water.

Remote travertine crater hot spring in Monitor Valley with near-boiling water, drive long gravel roads, short walk to rim, look only, no soaking.

Caliente motel with four private tiled hot spring soak rooms and some in-room tubs, bookings recommended, easy walk-in access, calm small-town vibe.

Toxic geothermal spring in Grand Canyon, boat-access only. Orange travertine pumpkin bowl at mile 212.9; soaking prohibited due to extreme arsenic levels.

Nature Conservancy spring in the Galiuro Mountains, closed to the public. Trails open to day hikers; bath house accessible to TNC members only.

Historic geothermal springs near Eden, Arizona, now a private retreat. Not open for walk-in soaking. Contact the operator for retreat access.

Artesian warm spring pond in a state park 8 miles south of Safford. Day-use fee required. Fishing, wading, short trails, and a Native American village nearby.

Sacred Hualapai geothermal springs on private tribal land near Wikieup, Mohave County. Known as Ha' Kamwe', the springs are not open to public visitors.

Historic mineral hot springs resort in Mesa, closed since 1999. The 1939 Pueblo Revival site is on the National Register of Historic Places and currently sits abandoned at 5900 E Main St.

Free geothermal pools inside a deep desert slot canyon along the Colorado River. Reached by technical backcountry hike or kayak from Hoover Dam, clothing optional, no facilities on site.

State park near Safford with hot spring tub permanently closed. Park is open and paid, with camping, fishing, lake swimming, and Mount Graham views.

Family-owned day spa south of Safford with private mineral tubs and outdoor soaking pond. Appointment required; indoor and outdoor options available.

Former warm spring pool near Littlefield along the Virgin River, closed by ADOT in 2022. Pool dismantled and site fenced. Not currently visitable.

Historic geothermal spring near Eden, AZ, now a private retreat. Springs reach 118 degrees F on private land with over a century of documented resort use.

Free BLM spring inside a basalt-walled desert canyon near US-93. Small rock pool at around 100 degrees after a flat 1.4-mile sandy wash hike. No facilities.

Free soaking pools in 1922 resort ruins on the Verde River. Rough forest roads and a river crossing required; no permit needed. Clothing optional.

Wilderness riverbank pools reached by a 5.3-mile hike from West Fork Trailhead, with variable temps, no services, and limited camping nearby.

Downtown Pagosa Springs tubs with rooftop views plus indoor pools, sauna, and cold plunge, swimsuit required, and soaking typically does not need reservations.

Quiet San Luis Valley soak with three outdoor geothermal pools, sauna, and lodging options, easy drive-in access, plus clear child rules and no alcohol.

Seasonal Alamosa geothermal pool with slides, diving board, lap swim and family nights, spring-fed water averaging about 88-96F across the pool.

Private guest-ranch hot springs near Creede with indoor mineral pool and outdoor geothermal pool, reserved for 4UR Ranch lodging guests only.

Riverside rock pools on the Piedra reached by a 1.5-mile walk from Sheep Creek Trailhead, with a steep final drop and no facilities.

Rustic northwest Colorado soak with a big mineral pool and smaller tubs, day use plus camping, and a straight drive-in setup near Lay.

Reservation-based desert pools near Florence with suits-optional hours, adults-only rules, and quiet no-phone soaking, plus airstream and tiny home stays.

Historic Glenwood Springs vapor caves with geothermal steam plus private mineral baths, reservation required, ages 13+, swimsuit required. silence inside.

Private Santa Maria Ranch warm spring near Hartsel, a small 78F source capped in pipework, not a public soak, useful as a local geothermal landmark.

Historic Idaho Springs resort with an indoor mineral pool under a glass atrium, outdoor tubs, and separate cave-style bathing areas, easy access from I-70.

Three secluded cabins near Nathrop, each with its own private hot spring soaking pool by Chalk Creek, ideal for quiet stays with no shared crowds.

Historic outdoor spring-fed pool near Boulder with lifeguards, mountain canyon views, seasonal day tickets, and an on-site ADA pool lift for easier entry.

Private mineral soaking rooms near Reno with adjustable tub temps, aromatherapy options, and a calm, appointment-led setup for adults and teens 12+.