2019 Map of McGrath A-3 SW

About this map

The high peaks of the Alaska Range dominate this 2019 survey, defining a landscape of extreme vertical relief and glacial topography. This interior wilderness spans the boundary between the Yukon-Koyukuk Census Area and the Bethel Census Area, reflecting the modern administrative divisions of Alaska's unorganized borough. The North Fork Big River serves as the primary drainage for the area, its course winding through deep valleys shaped by tectonic and glacial forces. Because there are no roads or settlements on this map, the topography itself reveals the difficulty of access to these high-altitude ranges, where contour lines tightly cluster around unnamed summits and ridges that feed into the larger Kuskokwim River watershed.