Harbin Hot Springs
By the HotSpringsFind editorial team · How we compile records · Reviewed September 2026
Harbin Hot Springs is a resort hot spring listed near Middletown, California. Reported soak temperature: 109°F. See the visit fact sheet.
Current status
Open 24/7/365 with reservations required — every adult 18+ must buy a membership ($15/30-day, $35/yr) on top of a timed pass: 6-hr day visit $45 M–Thu/$55 Fri–Sun, 24-hr visit incl. camping $60/$75, or 3-hr Harmony Pass $25/$30; clothing-optional pool area rebuilt after the 2015 Valley Fire, with two new Mainside hotel buildings (Walnut & Azalea, ~26 rooms) finishing construction with grand reopening slated Spring 2026 — expect ongoing construction noise.
Checked September 2026 · verified on the operator’s site · 4 sources ↓
Before you go
- Status: Reservation or permission required — confirm via Harbin Hot Springs — Accommodations & Rates (membership, 24-hr/6-hr/3-hr pass prices).
- Cost: Reported $45 — confirm current rates before visiting.
- Getting there: Developed resort — confirm operating hours and any reservation requirement.
- Water: Reported soak temperature 109°F — always test the water before entering.
- Rules: Reported clothing-optional; pets reported not allowed — confirm current rules.
- Conditions: check weather, fire closures, and land-manager alerts the week you go — mountain access changes seasonally.
- Reservations/permits: None — membership + timed pass covers entry
- Booking: Reservation required.
- Best time to go: Monday–Thursday is cheapest and quietest; avoid the first Tuesday of the month (Alligator Day maintenance); book weekends well ahead
- Clothing reality: Official: pool areas are clothing-optional in the tradition of onsens/naturist springs; clothing worn elsewhere on property. Customary reality: most pool-area guests are nude; families use the same area during kids' hours. Legal private-property naturism.
- Kids: Allowed.
- Cell service: spotty — download maps and tell someone your plan.
- Accessibility: Pool area accessibility improved post-2015 rebuild; ADA parking permits allow drive-up to pool area; ADA cottage and Dome room #1 available — request when booking
- Membership required for ALL guests 18+ on top of pass price ($15 30-day trial / $35 year / $300 lifetime)
- Reservations required — capacity-limited; Harmony/local pass holders turned away at capacity
- Children allowed in Mainside pool area only 10am–8pm summer (10am–sundown winter), and only the heart-shaped pool + large swimming pool
- Everyone in the same vehicle must buy the same pass length
- First Tuesday of every month = 'Alligator Day' — warm pool/hot & cold plunges drained for maintenance; only sauna plunges, heart pool, swimming pool open
- Vehicle max 24 ft / 2 axles; trailers must be detached
- Bring your own beach towel and padlock for lockers; Fern Dressing Room closed 12:15–3am for cleaning (items removed to lost & found)
- No pets — ADA service dogs only
- Alcohol/drug-free property; quiet time 10pm–10am
- Active construction near pools — check Construction & News Updates before booking
- Uphill walk from parking to pools; only displayed ADA placards may park near pool area
- Hazard: Active construction zones post-2015 fire rebuild
- Hazard: Wildfire country — evacuation protocols posted; smoking only on designated deck
- Hazard: Poison oak on trails; steep uphill walks
- Hazard: Limited parking/turnaround — strict 24-ft vehicle limit
About this spring
Famous clothing-optional retreat center and birthplace of Watsu — destroyed ~95% by the 2015 Valley Fire but the upgraded pool area (hot, warm, cold plunge and sauna) reopened January 2019; new hotel buildings slated for 2026 opening. Fee: 6-hr day visit $45 M-Th / $55 Fri-Sun; 24-hr visit $60-75 (+membership may apply); reservations required. Active construction ongoing — check harbin.org before booking; clothing-optional; children allowed in pool area limited hours.
Harbin Hot Springs is a hot spring retreat and workshop center situated at Harbin Springs (formerly, Harbin Hot Springs and Harbin's Springs) in Lake County, Northern California. Operated by Heart Consciousness Church, a non-profit, it is named after Matthew Harbin, a pioneer who settled in the Lake County area. Located approximately two hours north of the San Francisco Bay Area, in the United States, the facility suffered partial destruction in the Valley Fire in September 2015, resulting in its temporary closure. It partially reopened in January 2019, including the main pools and sauna, along with a limited cafeteria service. The clothing-optional retreat center is known as an outdoor spa with a New Age ambiance, where Watsu was developed.
Text from the Wikipedia article “Harbin Hot Springs”, available under CC BY-SA.
Directions & trailhead access
18424 Harbin Springs Rd, ~3.5 mi northwest of Middletown.
California geothermal context
California spans several geothermal provinces: the volcanic Cascades and Modoc Plateau in the northeast, Sierra Nevada granite seeps along the eastern front, Mojave and Colorado Desert springs in the south, and the famously mineral-rich Big Sur coast. Fire season (roughly June–November) closes access to many backcountry springs without warning — always check for current fire restrictions.
What a resort site means here
A resort spring is a commercial operation: developed pools or tubs with controlled temperatures, changing facilities, and usually day-use fees or lodging packages. Expect posted rules (swimsuits, quiet hours, age limits), staff on site, and in many cases required reservations — especially on weekends and holidays.
Best time to visit
Year-Round (Best: May – October)Pool temperatures and access can change with weather and season. Outdoor ambient temperatures fluctuate significantly across California. Late spring through autumn offers the most comfortable road access.
Fact sheet
| Reported soak temp | 109°F |
|---|---|
| Source temp (historical) | 109°F |
| Trail access | Recorded coordinates — access unverified |
| Access fee | Reported $45 — verify |
| Clothing policy | Reported clothing-optional |
| Pet policy | Reported no pets |
| Geothermal data reference | NOAA Thermal Springs List (1980 archive) |
| Check land status | Harbin Hot Springs — Accommodations & Rates (membership, 24-hr/6-hr/3-hr pass prices) |
Harbin Hot Springs FAQ
Is Harbin Hot Springs open right now?
Open 24/7/365 with reservations required — every adult 18+ must buy a membership ($15/30-day, $35/yr) on top of a timed pass: 6-hr day visit $45 M–Thu/$55 Fri–Sun, 24-hr visit incl. camping $60/$75, or 3-hr Harmony Pass $25/$30; clothing-optional pool area rebuilt after the 2015 Valley Fire, with two new Mainside hotel buildings (Walnut & Azalea, ~26 rooms) finishing construction with grand reopening slated Spring 2026 — expect ongoing construction noise. (Status verified on the operator’s site, last checked September 2026.)
Is Harbin Hot Springs free?
Harbin Hot Springs is listed with reported fees near Middletown. Fees are reported; confirm admission, parking and permit costs with the site manager.
What temperature is Harbin Hot Springs?
Harbin Hot Springs has a reported soak temperature of 109°F and a historical source temperature of 109°F in survey records. Historical data may not reflect current conditions — always test water before entering.
Is Harbin Hot Springs clothing optional?
Harbin Hot Springs is listed as traditionally clothing-optional in directory records. Confirm current rules before visiting, as policies change.
How do you access Harbin Hot Springs?
Harbin Hot Springs is a private venue with paid public admission. Confirm current hours, fees and booking requirements with the operator before visiting.
Where to stay in Middletown
Middletown is about 3.5 miles from Harbin. Arrange admission, membership requirements and any on-site accommodation with Harbin before choosing an off-site rental.
Check overnight options with the operator
Check the road and access notes above before you book.
We may earn a commission from bookings through these links, at no extra cost to you.
Sources & references
- Harbin Hot Springs — Accommodations & Rates (membership, 24-hr/6-hr/3-hr pass prices) — operator · 2026-09
- Harbin Hot Springs — Helpful Information & Policies (24/7 hours, kids pool hours, Alligator Day, vehicle limits, construction) — operator · 2026-09
- Harbin Hot Springs — homepage (clothing-optional pool areas, reservations required, no pets) — operator · 2026-09
- Harbin blog — Hotel rebuilding progress: Azalea & Walnut room numbers, grand reopening slated Spring 2026 — operator · 2025-02
Official website: www.harbin.org
Details above were verified against the named sources on their listed dates — conditions change, so recheck before traveling. · How we verify our data · Report a correction
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