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Nathrop, CO
Three private cabins (Hortense, Cottonwood, and Chalk Cliffs Chalet) along Chalk Creek in San Isabel National Forest, each with its own private hot-spring pool fed by the property's mineral waters. There is no public day use — the entire experience is an overnight rental with unlimited private soaking between Mt. Antero and Mt. Princeton. Guests report great privacy and wildlife sightings, though reviews are mixed on cabin upkeep relative to the price.
Redstone, CO
A working-ranch retreat in the Crystal River Valley south of Carbondale, built around three tiered natural hot-spring pools cascading past rock grottoes with views of Mt. Sopris. Lodging ranges from glamping wagons to 3-bedroom cabins, and overnight guests get 24-hour pool access; limited public day-soaking is available by reservation only. Clothing is required and the vibe is family-friendly rather than party-oriented.
Buena Vista, CO
Buena Vista's newest hot-spring resort, opened in spring 2024 along Cottonwood Creek on Cottonwood Pass road, with three outdoor thermal pools (104-106°F) and an indoor botanical garden with resident parrots. It shares branding/ownership ties with the neighboring Merrifield Homestead Cabins, which have their own private soaking pools for overnight guests only. The vibe is quieter and more intimate than the larger Chaffee County resorts.
Aspen, CO
Conundrum Hot Springs sits at 11,207 feet in the Maroon Bells–Snowmass Wilderness, reachable only by an 8.5-mile, 2,500-foot-gain hike up Conundrum Creek Trail from just outside Aspen. Natural pools of varying temperature — averaging around 100°F — reward the backpack with alpine panoramas of the Elk Mountains. Overnight stays require a competitive wilderness permit booked through Recreation.gov, with only 68 campers per night across 23 designated sites.
Buena Vista, CO
Cottonwood Hot Springs Inn & Spa is a rustic, naturally artesian hot-springs property about 5 miles outside Buena Vista at the mouth of Cottonwood Canyon. It has five hand-built soaking pools (roughly 94–110°F), a dry sauna, and a river cold plunge, backed by a lodge, cabins, and a campground. The vibe is quiet, natural, and low-key — a digital-detox style soak with views of the Collegiate Peaks.
Penrose, CO
A rustic, no-frills true geothermal spring on 160 acres in the Arkansas River Valley near Penrose — a converted 1924 oil well. It features one large 70-foot soaking pool at 95–98°F plus a hotter source tub near 108°F, with mountain views. Clothing is optional Wednesday through Sunday (swimsuits required on Tuesdays), and the crowd is mostly adults.
Florence, CO
An adults-only (18+) clothing-optional retreat on 10 acres in the Colorado 'banana belt' near Florence, with Front Range views. The centerpiece is one large turquoise mineral pool fed by an 1,100-foot artesian well, drained and cleaned weekly, plus private tubs for rent. Overnight options include vintage Airstreams, tiny homes, and van camping with soaking included.
Dolores, CO
An ultra-luxury all-inclusive resort built inside a restored 1800s mining ghost town in the San Juan Mountains near Dolores, with about a dozen hand-hewn log cabins and tents. It is a Relais & Châteaux property with 16+ age policy and no day-use option — overnight guests only. Winter access can be difficult; the resort recommends coordinating transportation.
Durango, CO
A modern, renovated hot springs resort (formerly Trimble Hot Springs) in the Animas Valley north of Durango. It has 32 natural mineral pools plus a resort-style swimming pool, cold plunges, private Ofuro tubs, a reflexology path, and a full spa. The water is famously odorless and is infused with oxygen nano-bubbles via their AquaGen system.
Eldorado Springs, CO
The historic 1905 swimming pool at the mouth of Eldorado Canyon, reopened in 2025 after a full renovation, fed by the 6,000-year-old Eldorado artesian spring (heated to ~79-82°F in summer). Sandstone canyon cliffs, a grassy creekside lawn, diving board, snack bar and new beer garden make it a classic summer day trip from Boulder/Denver. In winter it runs limited ticketed 'Hot Spring Series' soaking events at 95-100°F.
Glenwood Springs, CO
A historic resort in downtown Glenwood Springs operating since 1888, home to the world's largest hot springs pool alongside a hotter therapy pool. The property includes a 107-room lodge, poolside grill, Athletic Club, and the Sopris Splash Zone for kids. Day visitors can walk in without reservations and come and go all day.
Pagosa Springs, CO
A budget-friendly, old-west style hot springs resort on Hot Springs Blvd in Pagosa Springs, operating since 1950. It offers a large outdoor mineral pool, an outdoor hot tub, and separate indoor men's and women's bathhouses, with 100% natural undiluted mineral water and no added chemicals. Rooms, kitchenettes, suites, cabins, and a seasonal RV park are on site.
Hot Sulphur Springs, CO
Hot Sulphur Springs Resort & Spa is a historic, rustic hot-springs property in Grand County fed by 7 natural springs flowing since the 1840s. Day passes cover about 19 public mineral pools (98–112°F) with 100% natural gravity-fed water — no filters, pumps, or chemicals — plus a seasonal chlorinated swimming pool. The historic motel on site (est. 1943) and a sister property in town offer lodging, and spa massages include a complimentary all-day pool pass.
Idaho Springs, CO
A historic, 100+ year old hot springs resort in Idaho Springs, the closest hot springs to Denver. Its highlights are the famous steamy geothermal caves, an indoor mineral pool surrounded by tropical plants, private indoor tubs, and gender-separated steam areas. Lodging includes motel-style rooms, cabins, and an RV park, making it an easy day trip or overnight escape.
Glenwood Springs, CO
A modern riverside hot springs complex on the banks of the Colorado River with 35 pools, including 16 original geothermal pools (98–108°F), the WorldSprings area replicating famous springs like Iceland's Blue Lagoon and the Dead Sea, and the Sauna Summit with five global-style saunas. It splits into a family Select Access area and a 21+ Premier Access area for an adults-only experience.
Moffat, CO
Joyful Journey Hot Springs Spa is a wellness sanctuary on the valley floor of the San Luis Valley beneath the Sangre de Cristo Mountains, 32 miles south of Salida. Three flow-through mineral pools (98–108°F) plus hot tubs, a cold plunge, and a dry sauna anchor a contemplative, retreat-oriented property. Lodging ranges from lodge rooms to heated yurts, tipis, and RV/camp sites, with made-to-order breakfast and dinner included for overnight guests.
Maybell, CO
Juniper Hot Springs is a ghost of a 19th-century resort town in Moffat County, northwest Colorado — once home to a hotel, bathhouse, post office, and livery serving soakers in the Yampa River country near Lay. The commercial operation is long defunct and the site is now surrounded by remote State Trust and BLM land. Public soaking access today is unverified, so treat it as a historical curiosity unless you confirm current conditions locally before the long drive.
Nathrop, CO
Mount Princeton Hot Springs Resort is a historic 70-acre mountain resort in Nathrop between Buena Vista and Salida, set against the Chalk Cliffs at 8,250 feet. Its odorless geothermal waters feed a historic bathhouse soaking pool (105°F), an exercise pool, natural creekside pools, upper pools, and an infinity pool. Summer adds a 400-foot waterslide, and a spa club with adults-only pools serves overnight guests and spa patrons.
Steamboat Springs, CO
A historic, nonprofit hot springs recreation center in the heart of downtown Steamboat Springs with nine mineral pools and a cold plunge. It doubles as a full fitness and recreation facility with two 230-foot water slides, a splash pad, climbing wall, and gym. One admission covers the entire facility for the day with no reservation needed.
Ridgway, CO
A laid-back, natural hot springs resort at the base of the San Juan Mountains just north of Ridgway. It offers about ten soaking areas - seven outdoor pools, an indoor pool, and private tubs - with lithium-rich untreated mineral water. Clothing is optional in most outdoor soaking areas, and the property also has lodge rooms, camping, and yurts.
Ouray, CO
A city-owned, sulfur-free geothermal pool complex in Ouray, originally opened in 1927 and fully rebuilt in 2016–2017. It offers several pools at different temperatures, including an adults-only overlook pool at 102–106°F, plus summer water slides and a fitness center. It has no on-site lodging, but many hotels are within walking distance.
Pagosa Springs, CO
A small, intimate spa in downtown Pagosa Springs, in a Victorian-style building known for rooftop soaking tubs overlooking the San Juan River and mountains. No reservations are needed for soaking; it is one of the lower-priced soaks in town in the supplied dataset.
Carbondale, CO
Penny Hot Springs is a set of free, primitive rock-walled pools on the west bank of the Crystal River along Highway 133 between Carbondale and Redstone. Soakers rearrange river rocks to blend 133°F source water with cold river flow, dialing each pool's temperature to taste. Owned by Pitkin County since 1991, it is a beloved roadside stop best visited when river levels are low.
Pagosa Springs, CO
Piedra River Hot Springs is a cluster of primitive rock 'tubs' built into the banks of the Piedra River in the San Juan National Forest, west of Pagosa Springs. Reaching them takes a steep 1.5-mile descent from the Sheep Creek Trailhead off First Fork Road — the climb back out is the real workout. Free, clothing-optional, and dog-friendly, it is one of southwest Colorado's most rewarding wild soaks.
Kremmling, CO
Radium Warm Springs is a small primitive pool on the banks of the Colorado River just upstream of Gore Canyon, about 15 miles southwest of Kremmling. River rocks wall off a warm pocket — typically 85–95°F — from the cold current. Access rules have shifted: the old Mugrage/CPW social trail is closed for wildlife habitat protection, so hikers now use the Warm Springs Trail from the Warm Springs Road parking area off Trough Road.
Salida, CO
A city-run public aquatic center in Salida and one of the largest indoor hot springs pools in North America. The water is piped underground from springs near Poncha Springs about 4.5 miles away. Facilities include a 25-meter six-lane lap pool, a warm leisure pool around 97-100 degrees, and private soaking baths rentable by the hour.
Hooper, CO
A family-run artesian hot pool (kept at 98-100°F) on the San Luis Valley floor with big views of the Sangre de Cristo mountains, minutes from Great Sand Dunes National Park. The main 50x100-ft pool is family-friendly; a separate adults-only Greenhouse offers hotter soaking pools, a sauna and a bar. On-site lodging includes RV sites, tent sites, glamping cabins and a family hacienda, plus the Mile Deep Grille restaurant.
Steamboat Springs, CO
Rustic natural hot springs set along Hot Springs Creek in Routt National Forest, about 7 miles outside Steamboat Springs. Stone-masonry pools fed by mineral water sit creekside in a largely off-grid, wilderness setting with minimal lighting at night. It also offers overnight cabins, a covered wagon, and a train caboose for extended stays.
Manitou Springs, CO
A holistic wellness spa in Manitou Springs built around twelve private cedar soaking tubs fed by mineral water from the historic 7 Minute Spring, with mountain views. Your soak reservation includes access to shared amenities: saunas, a saline pool, cold plunge tubs, hammocks, and changing facilities. It also offers massage, skincare, hydrotherapy, and yoga classes.
Pagosa Springs, CO
The Springs Resort & Spa is a large hot-springs resort on the banks of the San Juan River in downtown Pagosa Springs, fed by the world's deepest measured geothermal spring. It offers 47 terraced pools at 87–114°F, including a dedicated adults-only Relaxation Terrace and newer wellness pools. A full-service spa, dining, and on-site lodging make it a complete wellness destination.
Villa Grove, CO
Valley View Hot Springs is a rustic, off-grid hot-springs sanctuary near Villa Grove managed by the nonprofit Orient Land Trust. Six natural pools (roughly 80–101°F) and a sauna are scattered across a wilderness preserve surrounded by BLM land — two near the parking area, four along a short hiking trail. The entire property is clothing-optional and all-ages, with daily guest numbers capped to protect the land.
Gunnison, CO
Waunita Hot Springs Ranch is a family-run dude ranch 26 miles east of Gunnison, centered on a large 95–102°F geothermal pool and two smaller hot tubs beneath Tomichi Dome. Beyond soaking, the ranch offers horseback riding, ATV trails, fishing, and home-cooked meals — a classic Colorado ranch vacation. Day-use swimming is available, but the ranch often books out for private groups, so calling ahead is essential.
Ouray, CO
A historic hot springs hotel and spa in downtown Ouray with a unique draw: a natural underground vapor cave, one of only two known natural geothermal vapor caves in the United States. Day visitors buy a 2-hour soak pass (walk-in only, capacity capped around 15 people) covering the outdoor mineral pool and the cave. The separate private Lorelei pool is the property's only clothing-optional soaking area, by reservation.
Glenwood Springs, CO
Natural geothermal vapor caves, in continuous operation since 1893 — geothermal water flows through the cave floor, creating 110–112°F steam chambers rich in 34 minerals. It is also a full-service day spa with private mineral baths, massages, wraps, and a salon. Reservations are required for all services and cave access.
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