Baranof Warm Springs
Baranof Warm Springs flow at 124 degrees Fahrenheit from ten distinct geothermal features on the eastern shore of Baranof Island. Located in a seasonally occupied community 20 miles east of Sitka, these springs provide the thermal focus for a small settlement accessible only by water in the heart of Southeast Alaska's Alexander Archipelago.
The springs emerge at just 75 feet elevation where Baranof Island's forested slopes meet water. The mineral composition features alkaline pH of 9.4 with relatively low total dissolved solids at 268 milligrams per liter, dominated by sodium at 48 milligrams per liter. The landscape combines dense Tongass National Forest vegetation with coastal access, creating a remote settlement anchored by thermal features.
The springs derive their name from Baranof Island itself, likely after early Russian colonial activity in the region. The geothermal manifestation reflects regional tectonic activity along the Alexander Archipelago. The community of Baranof Warm Springs developed around these thermal features as a seasonal gathering place.
Boat access only—no road or air service directly reaches the site. Flotation from Sitka takes several hours across open water. The Baranof Lake Cabin, a 4-kilometer distant floatplane journey away, serves as accommodation. Visit June through October for best conditions; weather can severely limit travel other times.
Is Baranof Warm Springs worth visiting?
Best for
- Hot spring soaking
- Backpacking adventures
- Overnight camping trips
Not ideal for
- Day trips with young children
The water at Baranof Warm Springs is alkaline (pH 9.4) with 268 mg/L total dissolved solids.
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Overview Baranof Lake Cabin sits on the shores of greenish-blue Baranof Lake on the southwestern edge of Baranof Lake, 20 air miles east of of Sitka, Alaska. The cabin is generally available June through October, and makes an excellent base for experiencing this corner of Alaska. This is a remote site. The cabin can be accessed by a 25-minute floatplane trip, weather permitting. In poor weather and low clouds, flying time can double, as flights must go the northern route around Baranof Islan...