2021 Map of Sumdum B-4 SW

About this map

Tongass National Forest dominates this Alaskan coastal reach, where the steep terrain of the Coast Mountains meets the tidal waters of Port Houghton. This modern survey reveals a landscape defined by sharp vertical relief and complex glacial hydrography, notably around the elevated Alice Lake in the northern portion of the quadrangle. The map details the intricate shoreline and several offshore landmasses, including Walter Island and Rabbit Island, which sit at the mouth of the bay. The lack of roads or established settlements emphasizes the remote wilderness character of this region, which remains largely under federal management within the National Forest system. Researchers and cartography enthusiasts can study the precise elevation contours and wetland distributions that characterize this rugged portion of the Petersburg Borough.