2021 Map of Sumdum D-3 SW

About this map

The Sawyer Glacier dominates this high-altitude landscape along the rugged international divide within the Tongass National Forest. Recorded by the U.S. Geological Survey, the map documents the frozen terrain of Southeast Alaska as it existed in 2021, tracing the sharp ridgelines and glacial expanse that define the border between the United States and Canada. The boundary is anchored by Boundary Peak 77, a critical survey point marking the high ground between the Hoonah-Angoon Census Area and British Columbia. This map provides a technical look at contemporary glacial geometry and the remote wilderness of the Pacific Northwest, where legal borders must follow the extreme topography of the Coast Mountains.