Quick FactsOverview
About Willett Hot Springs
Willett Hot Springs, California is a backcountry hot spring in the Sespe Wilderness of Los Padres National Forest, approximately 9.5 miles by trail from the Piedra Blanca Trailhead northeast of Ojai. The spring has been augmented with a man-made concrete collection basin that holds geothermally heated mineral water at around 100 degrees Fahrenheit.
The basin is distinctive among Southern California backcountry springs in that it can be maintained by visitors: a drain plug and scrub brushes are stored on site, allowing hikers to drain, scrub, and refill the tub when it becomes dirty. After draining, the basin naturally refills from the spring source in approximately one hour. The spring sits close to Willett Camp, a free backcountry campsite roughly 50 feet from the tub, making an overnight stay the natural way to experience the spring.
Willett lies on the same trail corridor as Sespe Hot Springs, which is an additional 5 to 6 miles further along the Sespe River Trail. For those seeking free natural hot springs in California in the chaparral wilderness north of Ojai, Willett is the more accessible of the two, requiring half the distance of the full Sespe hike and offering a maintained tub rather than the raw rock pools at Sespe.
Location & Access
Getting to Willett Hot Springs
Willett Hot Springs is reached via the Sespe River Trail from the Piedra Blanca Trailhead. To reach the trailhead, drive north from Ojai on Highway 33 for approximately 15 miles, then turn right at the signed junction for Rose Valley and Piedra Blanca, and follow the paved road about 5 miles to the parking area. An Adventure Pass is required for trailhead parking: $5 per day or $30 annually. A free self-issue wilderness permit is recommended at the trailhead.
From the trailhead, the Sespe River Trail follows Sespe Creek northeast for approximately 9.5 miles to the spring, passing the Bear Creek Camp at the midpoint and Oak Flat Camp before reaching Willett Camp and the hot spring. The trail involves multiple creek crossings and sections of exposed chaparral with little shade. The terrain is relatively flat along the creek corridor but the distance and heat make it demanding. Most visitors treat this as an overnight backpacking trip rather than a day hike.
For visitors researching hot springs near Ojai with a shorter approach than Sespe Hot Springs, Willett is the practical first option on this trail. Cell service is absent throughout the Sespe Wilderness; offline maps should be downloaded before departure. Trail conditions and creek levels should be confirmed with the Los Padres National Forest before visiting, particularly in winter and spring when crossings can be challenging.
Suitability & Accessibility
Who Willett Hot Springs Suits
Willett Hot Springs suits experienced hikers and backpackers who are comfortable with a 9.5-mile one-way approach through remote backcountry with creek crossings and no cell service. The round-trip distance of approximately 19 miles and the exposed trail conditions make it unsuitable for casual day hikers, families with young children, or visitors without backcountry experience. An overnight stay at Willett Camp is the standard approach.
The spring is not wheelchair accessible. The trail involves significant terrain variation, multiple stream crossings, and the final approach to the spring site is unimproved backcountry terrain. No adapted infrastructure exists at any point on the route.
Dogs are permitted on leash throughout the trail and at the spring. Clothing-optional use is the norm at the spring and at backcountry camps in this area. Free backcountry camping at Willett Camp adjacent to the spring and at several other sites along the Sespe River Trail makes multi-night trips practical. A campfire or camp stove permit is required for any open flame; the permit is free and available from the Los Padres National Forest website. Visitors seeking free hot springs in California in the Transverse Ranges backcountry will find Willett a rewarding and manageable first step on a trail that extends further to the much hotter and more remote Sespe Hot Springs.
Safety & Etiquette
Safety at Willett Hot Springs
Willett Hot Springs presents the standard hazards of a remote Los Padres backcountry trip. The trail is 9.5 miles one way with no services, no cell coverage, and limited shade for much of its length. Summer temperatures in the Sespe Creek canyon regularly exceed 100 degrees Fahrenheit; visiting in summer is inadvisable and potentially dangerous. Spring, fall, and mild winter days are the appropriate seasons.
Multiple creek crossings of Sespe Creek are required along the trail. After winter rain or during snowmelt, crossings can be deep, fast, and slippery. Checking current water levels and weather before departure is essential. Flash flooding is a real hazard in this canyon; do not attempt to cross flooded sections and be aware of conditions upstream even when skies are clear at the trailhead.
The spring tub itself is generally safe for soaking at its normal temperature of around 100 degrees Fahrenheit. The basin can be drained and scrubbed clean using the brushes stored on site; if the water appears fouled, draining and refilling before soaking is straightforward. All waste must be packed out of the wilderness; there are no trash facilities beyond the pit toilet at the Piedra Blanca Trailhead. Campfire and camp stove use requires a free permit obtainable from the Los Padres National Forest website.
Poison oak is common along the lower portions of the Sespe River Trail, especially in the riparian sections near creek crossings. Rattlesnakes and other wildlife are present throughout the wilderness. An Adventure Pass is required for trailhead parking and should be purchased before arriving, as it is not sold at the trailhead. The pass can be obtained at ranger stations or outdoor retailers in Ojai or nearby towns.
