Wilbur Hot Springs
- From $69
- 100–109°F
- 1 hr 51 min from Sacramento
- Reservations required
An off-grid, solar-powered hot springs hotel on Sulphur Creek in western Colusa County, surrounded by a 1,560-acre nature preserve. Untreated mineral water flows continuously through flumes in a Japanese-style Fluminarium at about 100 to 109F, and the bathing area is clothing optional and device free. Confirmed reservations are required for both day use and overnight stays, and only guests 13 and older are admitted.
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✓ Verified November 2026
- Price
- From $69
- Water
- 100–109°F
- Nearest town
- Williams
- From Sacramento
- 1 hr 51 min
- Reservations
- Required
Plan your visit
Hours & season
| Hours |
|
|---|---|
| Season |
|
Tickets & booking
| Price |
|
|---|---|
| Access | Reservation required |
| Booking |
|
Rules
| Swimwear |
|
|---|---|
| Ages |
|
| Dogs | No |
On site
| Pools | 5 |
|---|---|
| Lodging | Yes |
Water temperature
Soaking-pool temperatures as published by the venue or land agency; they vary with season and flow.
Mineral profile
Total dissolved minerals
5,564 mg/L
Extremely mineralized
- pH
- 6.7
- Temp at source
- 81°F
Lab analysis of the source water at “Turkey Run Geothermal Spring Nr Wilbur Springs Ca” (1.8 mi from Wilbur Hot Springs), sampled 2015 by the USGS and partners (data). Pool water may be cooled, mixed or treated, and spring chemistry is generally stable over decades. We report measurements only; we don't make health claims.
The pools
| Pool | Temp | Setting |
|---|---|---|
| Fluminarium flumesThree indoor flumes averaging about 100, 105 and 109F; untreated, continuously flowing. Silent area. | 100–109°F | Covered |
| Outdoor talking flumeOutdoor hot mineral flume where quiet conversation is allowed. | — | Outdoor |
| Swimming poolSpring-fed; cool and chlorinated in summer, geothermally heated and unchlorinated in winter. | — | Outdoor |
| Cold plungecoldAntique bathtub near the showers. | — | Outdoor |
As published by the venue. Temperatures shift with the seasons and the weather.
Facilities
- Flume water is untreated and flows continuously
- Swimming pool chlorinated in summer
- Heated with geothermal water and unchlorinated in winter
- Showers: yes
- Towel rental: no
- Towels included: no
- Food on site: no
- Drinks / bar: no
- Massage: yes
- Sauna: yes
| Bring your own alcohol | Allowed |
|---|---|
| Glass containers | Not allowed |
| Smoking | Not allowed |
| Photos | Not allowed |
| Good to know |
|
What's here
- Fluminarium with three indoor flumes (about 100, 105 and 109F)
- outdoor talking flume
- spring-fed swimming pool
- dry sauna
- antique-bathtub cold plunge
- off-grid and solar powered; no cell or WiFi
- community kitchen (bring your own food)
- 1,560-acre nature preserve with trails
- Fountain of Life geyser in the preserve
- healing arts sessions $180 for 75 min
- seasonal tent-platform camping Apr-Oct
Getting there
- From Sacramento1 hr 51 min83 mi
- From Sacramento (SMF)1 hr 43 min75 mi
Typical driving time without traffic or snow.
| Elevation | 1,355 ft |
|---|---|
| Road |
|
| Parking |
|
| Cell service | None |
Things to do near Williams
Cache Creek Natural Area
BLM primitive area and wilderness along Cache Creek; Redbud Trailhead is on Highway 20 east of Clearlake Oaks.
Berryessa Snow Mountain National Monument
BLM and Forest Service monument spanning the inner Coast Range around Cache Creek.
Nearby springs
Harbin Hot Springs
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.
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.
Golden Haven Hot Springs Spa and Resort
A family-owned spa and lodge on a residential street near downtown Calistoga, using mineral water from a geothermal aquifer beneath the property. Its gated, partly covered pool runs about 85-88°F, with two adjoining hot spas at 98-100°F and 102-104°F. There is no day use; the pool comes with a stay or any spa treatment, including shared couples mud baths.
Harbin Hot Springs: 21 mi · Calistoga Motor Lodge and Spa: 32 mi · Golden Haven Hot Springs Spa and Resort: 32 mi
Sources (13)
· 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.
- Official site: home
- Official site: Rooms rates
- Official site: Plan your visit
- Official site: About our water
- Official site: Policies and terms
- Official site: Current conditions at wilbur
- Official site: Food options
- Official site: Massage
- Official site: Nature preserve
- Official site: Contact
- nominatim.openstreetmap.org: Search
- blm.gov: Cache creek natural area
- blm.gov: Berryessa snow mountain national monument