2017 Map of Chandalar B-5 SW

About this map

The S Fork Koyukuk River meanders through the heart of this Yukon-Koyukuk landscape, defining the broad, wetland-rich expanse of the South Fork Flats. This 2017 survey by the U.S. Geological Survey captures a region of significant elevation contrast, where the low-lying river valley is framed by prominent terrain features such as the West Buttons to the south. Tributaries like Glacier Cr and Portland Cr drain the surrounding ridges, illustrating the hydrological network that feeds the larger Koyukuk system. The area is marked by a complete lack of human settlements or roads, representing a portion of the Alaskan interior where the natural drainage patterns of the Minnesota Cr and other mountain streams remain the primary geographic landmarks.