Top 5 Natural Hot Springs in Northern and Central California A Practical Guide for Exploration and Soaking

Tucked away along the eastern slopes of the Sierra Nevada and deep within the coastal mountain ranges, California's rich geothermal activity has created numerous breathtaking natural hot springs. Unlike commercial resort spas, these backcountry hot springs lack tiled floors, locker rooms, and showers. Instead, they feature natural mud bottoms, rocky edges, and panoramic wilderness views.

Seeking out these unpolished natural treasures is not only a therapeutic soaking experience but also a true outdoor adventure. To help you successfully navigate to these locations and enjoy them safely and responsibly, we have curated a list of the top five most iconic natural hot springs in California, along with essential pre-trip safety and etiquette guidelines.

1 The Top Five Must Visit Natural Hot Springs

These five hot springs are distributed across various public lands in California, each offering a unique landscape and varying levels of accessibility.

• Travertine Hot Springs Located near the town of Bridgeport in the Eastern Sierra and managed by the Bureau of Land Management (BLM), this easily accessible spot is famous for its mineral-rich waters that flow over colorful, cascading travertine rock terraces. The pools offer an incredibly expansive and unobstructed view of the jagged Sierra Nevada peaks. Accessible via a short dirt road and a brief walk from the parking lot, it is perfect for beginners. 

• Buckeye Hot Springs Also situated near Bridgeport, this hot spring offers a more secluded, rugged environment. Hot thermal water cascades down a steep canyon wall directly into the freezing waters of Buckeye Creek below. Visitors often use river rocks to build custom soaking pools along the riverbank, allowing for a perfect mix of hot and cold water. Access requires a short but very steep descent down a dirt trail; sturdy hiking shoes are highly recommended. 

• Wild Willy's Hot Springs Located in the vast high desert surrounding Mammoth Lakes, this area is famous for its natural, picture-perfect heart-shaped pool and consistently comfortable temperatures. To protect the fragile desert vegetation, a raised wooden boardwalk has been constructed. Visitors simply follow the boardwalk for a short walk to reach the soaking area. 

• Sykes Hot Springs Hidden deep within the Ventana Wilderness of Big Sur, this is the ultimate destination for hardcore backpackers. Reaching these tiny, remote pools nestled in a redwood canyon requires a grueling, 20-mile round-trip hike with significant elevation gain and multiple river crossings. There are no modern amenities, but the serene, isolated experience is unparalleled.

• Mono Hot Springs Tucked away deep in the Sierra National Forest, reaching this destination requires navigating a notoriously narrow, winding, one-lane mountain road. The thermal pools are scattered among massive granite boulders offering spectacular canyon views. Due to heavy snowfall, the road to Mono Hot Springs is completely inaccessible during the winter and is typically only open from late spring to early autumn.

2 Mandatory Leave No Trace Soaking Etiquette

Wild hot springs are incredibly fragile ecosystems. Irresponsible behavior can easily lead to land management agencies shutting down public access permanently. Every visitor must adhere to the following etiquette.

• Zero Glass Tolerance Never bring glass beer bottles or any glass containers anywhere near the pools. Broken glass in a muddy pool poses a severe laceration hazard to barefoot bathers and is nearly impossible to clean up. Use aluminum cans or insulated flasks instead.

• Respect Clothing Optional Norms In remote California hot springs, "clothing optional" soaking is a long-standing tradition. If you arrive and find people soaking nude, be respectful, maintain eye contact, and never use your phone or camera to take photos pointing toward the pools. 

• No Soaps or Shampoos A wild hot spring is a closed or delicate micro-ecosystem. Never use any soap, shampoo, or body wash in the pools. Even products marketed as "biodegradable" or "eco-friendly" will severely contaminate the water and harm the environment.

• Pack Out All Trash There are rarely any trash cans at these sites. Every piece of garbage you create—including fruit peels and toilet paper—must be packed out in your own trash bag and disposed of properly in town.

3 Invisible Hygiene Risks in Natural Geothermal Waters

While mineral-rich waters can feel great on the skin, wild thermal pools are entirely untreated and unchlorinated, presenting specific health risks that bathers must be aware of.

• The Naegleria Fowleri Warning Stagnant, warm freshwater can harbor Naegleria fowleri, an extremely rare but highly lethal "brain-eating" amoeba. This organism can only infect a human by entering through the nasal cavity. Therefore, you must never dive, completely submerge your head, or allow the hot spring water to aggressively splash up into your nose.

• Insects and Chiggers During the spring and early summer, the grassy areas surrounding hot springs can be teeming with mosquitoes and biting mites (chiggers). To avoid bites, place your clothes and towels on dry rocks rather than directly on the moist dirt, and thoroughly inspect your skin after getting out of the water.