The Thayer Lake East Shelter Cabin is the ruined remains of a historic backcountry shelter in the Admiralty Island National Monument, part of the Tongass National Forest in Southeast Alaska. It was one of a number of such facilities built by Civilian Conservation Corps (CCC) on the Admiralty Island Canoe Route between 1933 and 1937. This cabin, a three-sided Adirondack-style log structure with shake walls and roof, was built in 1936, and located on the lake near the portage trail connecting to Distin Lake. Unlike other cabins built by the CCC on the island, which were of post-and-beam construction, in this one the logs were saddle-notched together at the corners.