Wild Willy's Hot Springs
Wild Willy's Hot Springs flows at 120 degrees Fahrenheit along Owens Valley's eastern margin near Mammoth Lakes, emerging at 6,880 feet elevation on Bureau of Land Management property. Recent USGS measurements recorded 57.1 degrees Celsius (134.8°F) with neutral pH 7.0 and elevated sodium content of 370 milligrams per liter in high desert terrain.
The spring sits in the transition zone between pinyon-juniper forest and high desert sagebrush at the eastern Sierra Nevada's base. A 665-meter walk from the road accesses the thermal feature through typical Inyo County landscape with minimal vegetation. Snow cover from October through May transforms access conditions seasonally, while summer conditions provide relatively straightforward approaches through sagebrush terrain.
Access requires a 665-meter walk (2,182 feet) through sagebrush-covered terrain, classified as a short hike in summer conditions. Winter snow from December through March makes access challenging or impossible. Best visits occur June through October when trails are clear. Bring warm clothing as air temperatures remain cold even in summer. The neutral pH water is suitable for extended soaking.
Wild Willy's Hot Springs formed through deep geothermal circulation related to the Long Valley Caldera system and Sierra Nevada's thermal regime. The neutral pH and elevated sodium content reflect mineral-bearing aquifers circulating through basin fill and volcanic materials. The Bureau of Land Management manages the feature as publicly accessible geothermal resource within protected land status.
The water at Wild Willy's Hot Springs is neutral (pH 7.0) with 1260 mg/L total dissolved solids. It is notably rich in sodium (supports circulation and skin hydration), chloride (natural antiseptic with skin health benefits), and total dissolved solids (higher mineral concentration for therapeutic soaking).
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Overview Crowley Lake Campground offers 47 RV/tent sites, maximum recommended RV length is 30 feet. All sites include a fire pit, picnic table and a lantern holder. No hook-up. Potable water is available. Dump station fee is $10.00, no passes accepted. Closest amenities are 2 miles south in Crowley, or 10 miles north in Mammoth Lakes. Recreation Popular activities include lake and stream fishing, boating, windsurfing, horseback riding, hiking, and wildlife viewing. Facilities Crowley Lake...
Wild Willy's Hot Springs sits at 6,880 feet above sea level, way above the mile-high mark. You may not feel the altitude strongly, but hot water still dehydrates you faster at elevation. UV is about 28% stronger than at sea level, so bring sunscreen and drink more water than you normally would.
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Wild Willy's Hot Springs is road-accessible, so you can bring more gear. The water runs hot, so extra hydration is key.
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