Unnamed Thermal Spring
At 4,530 feet elevation in the remote Modoc County high country near Alturas, this 81-degree spring creates a 30-degree thermal contrast in one of California's coldest mountain environments.
The spring emerges near Rattlesnake Creek in forested alpine terrain, with a short walk of just 355 meters from the road through mountain meadows and conifer forest. Winter snowfall transforms the landscape, with over 45 inches of annual snow creating deep pack conditions for much of the year.
Access via Rattlesnake Creek Road requires a 355-meter walk through often-snowy terrain. Plan visits for summer and early fall when snow has melted and access is reliable. Winter conditions make this spring inaccessible for much of the year, though prepared visitors with appropriate gear may attempt shoulder seasons.
The spring's 30-degree temperature elevation above the 50.6-degree ambient reflects significant geothermal circulation in the South Warner region. This area experiences extreme seasonal variation, with long winters and brief summers typical of California's northeastern plateau.
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The campsites are mostly shaded and enjoy serene surroundings and are equiped with 12' X 12' metal corrals. A short trail runs over to the start of the Summit Trail where it heads south into the South Warner Wilderness. No wilderness permits are required however, if you plan to use a camp or backpack stove or charcoal barbeque or have a campfire outside the developed campground, you will need a current California Campfire Permit.
this spring is road-accessible, so you can bring more gear.
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