Where California's Hot Springs Are
The state's hot springs cluster in three areas. The Eastern Sierra around Mammoth Lakes and Bridgeport holds the famous free, natural pools sitting out in the high desert with mountain views. The North Coast and inland Mendocino and Lake counties hold the historic spa resorts like Vichy Springs and Harbin. And the desert around Palm Springs, especially the town literally named Desert Hot Springs, holds mineral-water resorts built for winter soaking.
That geographic spread means a hot spring fits almost any California route. Skiers and hikers in the Eastern Sierra can soak after a cold day, coastal travelers on the Pacific Coast Highway road trip can detour to the Big Sur cliffs at Esalen, and desert visitors can build a whole trip around the mineral resorts. The full desert context is on The Deserts region page.
Understand the split before you go: some springs are free, primitive, and completely undeveloped, and others are ticketed resorts with pools, lodging, and spa treatments. The wild pools cost nothing but require a drive on dirt roads and offer no facilities. The resorts cost money but give you changing rooms, clean water, and a bed. Neither is better; they are different trips.
The Free Sierra Pools
The Long Valley area east of Mammoth Lakes, on the Benton Crossing Road out past the airport, is the best-known cluster of free geothermal pools in California. Wild Willy's (Crowley) Hot Springs and Hilltop Hot Springs sit out in the sagebrush with the Sierra crest on the horizon, reached by dirt roads and short walks. There are no fees, no attendants, and no changing rooms, so you pack in everything and pack out all trash. Base in Mammoth Lakes and go early or at sunset to beat the crowds.
Farther north near Bridgeport, Travertine Hot Springs sits above town with terraced natural pools and a wide view of the Sawtooth Range, and Buckeye Hot Springs pools up beside a creek so you can alternate hot soak and cold plunge. These are also free and undeveloped. Winter access can require a snowy, high-clearance drive, and the roads to several turn to impassable mud after rain or snowmelt, so check conditions locally.
For a developed but still rustic option in the same country, Grover Hot Springs State Park near Markleeville has a maintained hot pool and a cool pool in a green mountain valley, with a day-use fee and an adjacent campground. It is the easy, family-friendly way to experience Sierra geothermal water without a dirt-road adventure, and it pairs naturally with camping and RV stays in the surrounding forest.
Resorts and Developed Springs
Desert Hot Springs, just north of Palm Springs, is built over natural hot mineral aquifers, and dozens of small hotels and larger resorts pipe that water into their pools. Two Bunch Palms is the well-known wellness resort here, with mineral pools and a spa, and many of the smaller boutique hotels sell day passes to their mineral soaking pools. Winter is the season, when the desert is pleasant and a hot soak makes sense. The wider scene is on the Palm Springs page.
In the north, a set of historic spa resorts has drawn soakers for over a century. Vichy Springs Resort near Ukiah runs naturally carbonated mineral baths, Orr Hot Springs nearby is a clothing-optional retreat, and Sierra Hot Springs near Sierraville and Wilbur Hot Springs in the Coast Range are quiet, rustic soaking retreats. These are day-pass or overnight destinations with a calm, unplugged feel.
On the coast, the Esalen Institute in Big Sur runs its cliffside mineral baths perched right above the Pacific, one of the most dramatic soaks anywhere. Public access is limited to reserved night sessions, so plan ahead. The setting is unmatched, hanging over the ocean along the Big Sur coast; read the Big Sur page for how to time a stop. For guided wellness and soaking excursions, check the tour operators and guides directory.
Seasons, Cost, and Access
Season depends on elevation. The Eastern Sierra free pools are open year round, but the high-desert setting means summer soaks are best at dawn or dusk to avoid the heat, while winter offers the postcard scene of steaming water against snow, if you can reach the pools on snowy roads. The desert resorts around Palm Springs are a fall-through-spring activity, roughly October to April, and miserable in summer heat. The North Coast resorts work most of the year.
Cost ranges from nothing to a full spa bill. The Eastern Sierra and Bridgeport wild pools are free. Grover Hot Springs State Park charges a modest day-use and pool fee. Day passes at the desert mineral resorts and the North Coast spas typically run from about $20 up to $50 or more depending on the property and the day, and Esalen's public night bath sessions carry a set fee. Overnight stays and spa treatments cost considerably more.
Getting there is the real planning variable for the free pools. Many sit at the end of dirt roads that a low passenger car can handle in dry weather but not after rain or snow. Fill your tank, carry water, and do not rely on cell service. The resorts, by contrast, are on paved roads with parking and full facilities.
Soaking Etiquette and Safety
The free pools survive on good behavior. Pack out every scrap of trash, keep noise down, skip glass containers, and never use soap or shampoo in a natural pool, which fouls the water for everyone and the ecosystem. Some undeveloped springs are clothing-optional by custom; read the situation and be respectful either way. Arrive early or late, because the popular pools fill up and the experience is better with room to breathe.
Soak smart. Test the water before you get in, since natural springs vary in temperature and some run hot enough to scald. Limit long soaks, hydrate, and get out if you feel lightheaded. Alcohol and hot water are a poor mix, especially at altitude in the Sierra. Avoid submerging your head in untreated natural springs, a precaution against rare waterborne organisms.
Hot springs pair with almost everything else California offers, from a post-ski soak near Mammoth to a desert-resort wind-down after hiking the parks. Many of the best free pools sit within reach of the national parks, and a Sierra soak trip slots neatly around a coast run to the best beaches in California. The full regional picture is on the California travel guide.
Frequently asked questions
Are there free natural hot springs in California?
Yes. The Eastern Sierra around Mammoth Lakes and Bridgeport holds the best-known free pools, including Wild Willy's and Hilltop in the Long Valley area and Travertine and Buckeye near Bridgeport. They are undeveloped, reached by dirt roads with no facilities or fees, so pack in everything and pack out all trash.
When is the best time to visit California hot springs?
It depends on the location. The Eastern Sierra free pools are open year round but best at dawn or dusk in summer heat, with snowy roads a factor in winter. The desert mineral resorts around Palm Springs are a fall-to-spring activity, roughly October through April, and too hot in summer. North Coast spa resorts work most of the year.
Are California hot springs clothing-optional?
Some are and some are not. Certain undeveloped Sierra pools and retreats like Orr Hot Springs are clothing-optional by custom, while state-park and family resorts such as Grover Hot Springs require swimwear. Read the setting when you arrive and be respectful. If you are unsure, bring a swimsuit, which is welcome everywhere.
Are there hot springs near Death Valley or Palm Springs?
Yes. Desert Hot Springs, just north of Palm Springs, sits over natural mineral aquifers and has dozens of resorts and small hotels with mineral pools, including Two Bunch Palms, many selling day passes. Near Death Valley, the small town of Tecopa has mineral pools. Both areas are best October through April and far too hot in summer.