2018 Map of Coleen A-1 SW

About this map

Salmon Trout River meanders across the northern reaches of this remote Alaskan interior, carving a distinct valley floor that contrasts with the surrounding high-elevation ridgelines. As a part of the U.S. Geological Survey 2018 US Topo series, the sheet documents the complex topography of the Yukon-Koyukuk Census Area with 40-foot contour intervals. The landscape is defined by its dramatic relief and the absence of human infrastructure, focusing instead on the hydrological patterns and township and range boundaries like t26n r29e and t27n r28e that divide the wilderness. This modern survey provides researchers a precise look at the drainage patterns and land-division grids in a region where the natural water systems remain the primary geographic landmarks.