Fumarole
Fumarole emerges at an extraordinary 203°F within the restricted Naval Air Weapons Station China Lake at 4,280 feet elevation, where public access is explicitly prohibited. With pH of only 1.5—comparable to battery acid—and iron concentrations of 28,000 µg/L, this superheated spring represents extreme geothermal chemistry inaccessible to civilian visitors.
The spring sits in sparse, high-desert terrain surrounded by pinyon and grey pines at the base of the Sierra Nevada. Winter brings modest snowfall (10.7 inches) while annual precipitation totals just 6.9 inches. The extremely acidic water and elevated iron content produce distinctive rust-colored mineral deposits and noxious gas emissions. The landscape reflects the austere beauty of the western Mojave high desert.
Located entirely within Naval Air Weapons Station China Lake, Fumarole is explicitly closed to civilian visitors. Military personnel and authorized researchers occasionally conduct investigations, but public access is prohibited for safety and security reasons. Nearby Chimney Creek Campground offers civilian camping 28.5 km away. The site remains scientifically significant despite being off-limits to general visitation.
Fumarole occupies geothermal terrain within one of North America's most active heat-flow zones. The extreme acidity (pH 1.5) and massive sulfate concentrations (1,400 mg/L) reflect unusual mineral assemblages: intense acidic alteration from sulfuric acid generated by hydrogen sulfide oxidation. The site's thermal vigor and chemical extremity make it geologically extraordinary, though inaccessible to the public.
The water at Fumarole is strongly acidic (pH 1.5) with 2500 mg/L total dissolved solids. It is notably rich in magnesium (known for muscle relaxation and stress relief), sulfate (traditionally used for skin conditions and inflammation), and iron (iron-rich springs may support circulation).
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Chimney Creek Campground is located within Chimney Peak Recreation Area and is cherry stemmed out of Owens Peak Wilderness. The campground contains 36 sites and is nestled among beautiful pinyon pines, grey pines, and oaks along Chimney Creek at 5,700 feet in elevation. Each site in the campground has a picnic table and fire ring. Potable water is available during the summer months near the very end of the campground loop at site 36. During the summer, days can be warm and dry. The Pacific C...
Fumarole is road-accessible, so you can bring more gear. The water is dangerously hot — bring water shoes and test pools carefully.
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