2018 Map of Sumdum D-3 SW

About this map

The United States and Canada border cuts sharply across this remote glacial landscape, defined by the towering heights of Boundary Peak 77. This 2018 survey reveals the high-altitude interface where the ice of the Sawyer Glacier and the South Sawyer Glacier flows through the steep terrain of the Tongass National Forest. The map provides a precise look at the international boundary line as it follows the rugged topography of the Alaska-British Columbia frontier. The absence of roads or man-made structures underscores the wilderness character of the region, emphasizing the massive scale of the ice fields and the natural drainage patterns of these large glaciers.