Harbin Hot Springs
- From $25
- 98°F
- 2 hr 18 min from Sacramento
- Reservations required
A rustic, clothing-optional retreat center north of Middletown run by the non-profit Heart Consciousness Church, with eight Mainside pools ranging from a very hot enclosed pool to cold plunges, plus a sauna and steam room. Visitors buy a membership and a 3-, 6- or 24-hour pass, and the property bans alcohol, drugs, phones and cameras. Rebuilding after the 2015 Valley Fire continues, with two new Mainside hotels under construction.
Open during ongoing construction of the Walnut and Azalea Mainside hotels; check harbin.org construction updates before booking.
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✓ Verified November 2026
- Price
- From $25
- Water
- 98°F
- Nearest town
- Middletown
- From Sacramento
- 2 hr 18 min
- Reservations
- Required
Plan your visit
Hours & season
| Hours |
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|---|---|
| Season |
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Tickets & booking
| Price |
|
|---|---|
| Access | Reservation required |
| Booking |
|
Rules
| Swimwear |
|
|---|---|
| Ages |
|
| Dogs | No |
On site
| Pools | 8 |
|---|---|
| Lodging | Yes |
Water temperature
This venue doesn't publish pool temperatures.
The pools
| Pool | Temp | Setting |
|---|---|---|
| Warm PoolMain pool; silent meditation area. Drained the first Tuesday of each month. | — | Outdoor |
| Hot PoolEnclosed under a peaked stained-glass roof; described as extremely hot. Silent area. | — | Covered |
| Cold PlungecoldVery cold untreated water flowing directly from its spring. | — | Outdoor |
| Trellis Hot PlungePartially solar heated; can be very hot. In the ADA-compliant trellis area. | — | Outdoor |
| Trellis Cold PlungecoldRefrigerated via a pool-to-pool heat exchanger. | — | Outdoor |
| Heart PoolAbout body temperature; quiet talking allowed; supervised children 10am-dusk. | — | Outdoor |
| Swimming PoolUsually cooler; warmed slightly in cold weather. No diving. | — | Outdoor |
| Spa Services PoolBody-temperature oval pool used for Watsu and aquatic bodywork sessions. | — | Covered |
| Domes Upper PoolAt the Domes lodging, about 98F. The lower Domes pool is unheated. | 98°F | Outdoor |
As published by the venue. Temperatures shift with the seasons and the weather.
Facilities
- Pools sanitized mainly with hydrogen peroxide, ozone and UV instead of chlorine
- The historic Cold Plunge is untreated spring flow
- Changing rooms: yes
- Showers: yes
- Lockers: yes
- Towel rental: no
- Towels included: no
- Food on site: yes
- Drinks / bar: no
- Massage: yes
- Restrooms: yes
- Sauna: yes
| Accessibility |
|
|---|---|
| Bring your own alcohol | Not allowed |
| Glass containers | Not allowed |
| Smoking | Not allowed |
| Photos | Not allowed |
| Good to know |
|
What's here
- eight Mainside pools fed by different-temperature springs
- enclosed Hot Pool under stained glass
- silent meditation pools (Warm, Hot, Cold Plunge)
- dry sauna and steam room
- clothing-optional sundeck
- Watsu / in-water bodywork pool
- Stonefront Restaurant
- meadow tent and vehicle camping
- cottages, domes and caravans
- hiking trails
- alcohol and drug free; no electronics or photos
Getting there
- From Sacramento2 hr 18 min107 mi
- From Santa Rosa1 hr 3 min36 mi
- From Santa Rosa (STS)1 hr 7 min39 mi
Typical driving time without traffic or snow.
| Elevation | 1,566 ft |
|---|---|
| Road |
|
| Parking |
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Things to do near Middletown
Robert Louis Stevenson State Park
Trail to the Mount St. Helena summit, 7 miles north of Calistoga on Highway 29.
Anderson Marsh State Historic Park
Marshland and trails at the southeast corner of Clear Lake on Highway 53.
Nearby springs
Calistoga Motor Lodge and Spa
A retro-styled motor lodge at the north end of Lincoln Avenue, now part of JdV by Hyatt, with outdoor pools and a hot tub filled with mineral water from Calistoga's geothermal springs. MoonAcre Spa on site offers mud baths and massage. Day passes are sold through ResortPass.
Calistoga Spa Hot Springs
A downtown Calistoga resort built around four outdoor pools filled with geothermal mineral water from a well beneath the property, ranging from about 80 to 104°F. The covered, jetted octagonal Jet Pool is adults only. Pools are for room guests and people booking spa treatments, which include traditional volcanic ash mud baths.
Dr. Wilkinson's Backyard Resort & Mineral Springs
Calistoga's resort and spa running since 1952 on Lincoln Avenue, with three geothermal mineral pools, one indoor and two outdoor, set at about 85, 95 and 104°F. The 104°F Hot Spring is adults only. Day visitors can buy pool passes, daybeds and cabanas through ResortPass, and the spa still offers its original mud bath, The Works.
Calistoga Motor Lodge and Spa: 14 mi · Calistoga Spa Hot Springs: 15 mi · Dr. Wilkinson's Backyard Resort & Mineral Springs: 15 mi
Sources (11)
· checked November 2026
Prices, hours and rules are checked against the official site and land-agency pages. Spot something out of date? Let us know.