Willett Hot Springs
By the HotSpringsFind editorial team · How we compile records · Reviewed September 2026
Willett Hot Springs is a primitive hot spring listed near Ojai, California. Reported soak temperature: 101°F. See the visit fact sheet.
Current status
A metal tub fed by a ~99-102°F natural hot spring 10 miles up the Sespe River Trail in the Sespe Wilderness (Los Padres NF) — open and soaking, but reached only by a hard 20-mile round trip with repeated Sespe Creek crossings that become dangerous after rain.
Checked September 2026 · based on recent visitor reports · 6 sources ↓
Before you go
- Status: Open — last verified below — confirm via VC Reporter — helicopter rescues in Sespe Wilderness.
- Cost: Reported free access — fees and permits can change, confirm before visiting.
- Getting there: No verified hike distance on record — confirm the route and road conditions.
- Water: Reported soak temperature 101°F — always test the water before entering.
- Rules: Reported clothing-optional; reported dog-friendly.
- Conditions: check weather, fire closures, and land-manager alerts the week you go — mountain access changes seasonally.
- Reservations/permits: No wilderness permit or quota for the Sespe River Trail. Adventure Pass needed for trailhead parking; CA campfire permit for stoves/fires.
- Best time to go: Spring (Mar-May) and fall (Sep-Nov) — summer is brutally hot on exposed trail sections and the creek can be dry; winter brings flood risk on crossings. Weekdays for a quieter tub.
- Clothing reality: No official policy — standard backcountry. Swimwear is the norm at the tub; occasional clothing-optional use reported historically at remote wilderness springs. Nothing posted.
- Kids: Allowed.
- Cell service: none — download maps and tell someone your plan.
- Accessibility: Not accessible — 10-mile wilderness trail with creek fords and a steep final 300-ft climb to the tub.
- 10 miles ONE WAY from Piedra Blanca Trailhead (~20-25 mi north of Ojai on Hwy 33); ~2,400-2,500 ft total gain; typically an overnight backpacking trip — Willett Camp is beside the springs
- Adventure Pass required to park at the trailhead ($5/day or $30/yr, at ranger stations and retailers)
- Numerous Sespe Creek crossings — rock-hop in dry season but knee-deep+ wading after storms; on March 30, 2024, 11 hikers and 3 dogs were helicopter-rescued after overnight rain raised the creek ~1 ft and stranded groups between crossings
- A major landslide between Bear Creek and Kerr Spring took out a large trail section in the Jan 2023 storms — hikers still pass it with care; Bear Creek Camp was largely erased by flood debris
- Highway 33 north of Rose Valley closed for months after the Jan 2023 storms and reopened ~Jan 2024 with construction signal lights — check LPNF alerts/Caltrans for intermittent closures before driving up
- California campfire permit required for camp stoves/fires; fires only in existing rings; free backcountry camping
- Sespe Hot Springs ~5-6 mi beyond Willett is much hotter (source scalding) — separate, more remote destination
- Hazard: Sespe Creek crossings — flash flood/rising water after rain (Mar 2024 helicopter rescues)
- Hazard: Landslide-damaged trail section near Kerr Spring (post-Jan 2023 storms), routefinding on slide debris
- Hazard: Rattlesnakes, poison oak, ticks
- Hazard: Extreme summer heat; 20-mile round trip with remote self-rescue
- Hazard: Intermittent Hwy 33 storm closures cutting trailhead access
About this spring
Backcountry sulfur spring in the Sespe Wilderness — a ~10-ft man-made tub piped from the geothermal source holding 99-102°F, ~9.5 mi up the Sespe River Trail; free dispersed camping nearby. Fee: Free; Adventure Pass for trailhead parking. Multiple creek crossings impassable after rain; strong sulfur odor.
Willett Hot Springs is located in the Sespe Wilderness, North of Ojai, California. This natural hot spring has been augmented by a man made collection basin. The most popular approach to the hot spring is by an approximate 11 miles (18 km) hike from the Piedra Blanca trailhead in Los Padres National Forest. Nearby Sespe Hot Springs (about 3 miles (4.8 km)) has a reputation as one of the hottest springs in California.
Text from the Wikipedia article “Willett Hot Springs”, available under CC BY-SA.
Directions & trailhead access
Piedra Blanca Trailhead off Hwy 33/Rose Valley Rd; Sespe River Trail ~9.5 mi to a signed steep side trail.
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 primitive site means here
Primitive springs have no facilities: no changing rooms, no trash service, often no maintained road to the pool. Expect natural rock or gravel bottoms, water temperature that varies by spot and season, and other visitors who may treat the site informally. Pack out everything you bring, test the water before entering, and leave the pool cleaner than you found it.
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 | 101°F |
|---|---|
| Source temp (historical) | 101°F |
| Trail access | Recorded coordinates — access unverified |
| Access fee | Reported free — verify locally |
| Clothing policy | Reported clothing-optional |
| Pet policy | Reported dog-friendly |
| Geothermal data reference | NOAA Thermal Springs List (1980 archive) |
| Check land status | VC Reporter — helicopter rescues in Sespe Wilderness |
Willett Hot Springs FAQ
Is Willett Hot Springs open right now?
A metal tub fed by a ~99-102°F natural hot spring 10 miles up the Sespe River Trail in the Sespe Wilderness (Los Padres NF) — open and soaking, but reached only by a hard 20-mile round trip with repeated Sespe Creek crossings that become dangerous after rain. (Status based on recent visitor reports, last checked September 2026.)
Is Willett Hot Springs free?
Willett Hot Springs is listed as free to access in Ventura County, California. Fees and rules change — verify current status with the land manager before visiting.
What temperature is Willett Hot Springs?
Willett Hot Springs has a reported soak temperature of 101°F and a historical source temperature of 101°F in survey records. Historical data may not reflect current conditions — always test water before entering.
Is Willett Hot Springs clothing optional?
Willett Hot Springs is listed as traditionally clothing-optional in directory records. Confirm current rules before visiting, as policies change.
How do you access Willett Hot Springs?
Willett Hot Springs is on public land — verify current road access, fees and rules with the land manager before visiting.
Sources & references
- CA Travel Times — Willett Hot Springs updated guide — community · 2026-09
- AllTrails — Sespe River Trail to Willett Hot Springs — community · 2026-09
- Shirt and Tie Adventures — Willett trip report (post-storm trail conditions) — community · 2024-01
- VC Reporter — helicopter rescues in Sespe Wilderness — news · 2024-04
- Komoot — Willett Hot Springs (Hwy 33 closure note) — community · 2026-09
Additional references for this record; a source link does not guarantee current conditions.
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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