Split Thumb

Split Thumb is a 5,523-foot glaciated summit in the Boundary Ranges of the Coast Mountains in southeastern Alaska, about 9 miles northeast of Juneau near the southern edge of the Juneau Icefield. On Tongass National Forest land, it rises between Lemon Creek Glacier and Norris Glacier, with the Split Thumb Icefall on its eastern side. The U.S. Geological Survey published its descriptive name in 1951. A Juneau Icefield Research Project party first climbed the mountain on July 2, 1954, tying it to the scientific and mountaineering work of the icefield. Its subarctic climate, fed by Gulf of Alaska storms, brings heavy rain and snow that sustain the surrounding glaciers.

Juneau, Alaska · United States