1958 Map of McGrath D-2

About this map

The South Fork Kuskokwim River anchors the southwestern corner of this interior Alaskan landscape, which was primarily unmapped on the ground when these 1950s aerial surveys were conducted. A seasonal transportation network is indicated by the Winter Trail, which cuts across the marshy lowlands north of the Big Salmon Fork. This region is defined by a dense network of braided waterways and glacial runoff, where the Tonzona River and its various tributaries, including the South Fork Tonzona River and Pinkston Fork, create a complex drainage pattern. The absence of permanent settlements and the reliance on winter-only routes reflect the formidable challenges of navigating this terrain before more modern infrastructure. Other notable water features include the aptly named Deepbank Creek, Clear Fork, and No Creek.