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2016 Map of Ophir A-4 SW

Name: 2016 Topographic Map of Ophir A-4 SW
Creator: U.S. Geological Survey
Published: 2016
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2016

About this map

The Iditarod River serpentines across this landscape, defining the western half of the terrain with its intricate network of oxbow lakes, sloughs, and marshy wetlands. This 2016 survey documents a remote stretch of the Yukon-Koyukuk region where the water's meandering path has carved deep into the valley floor over generations. To the east, the topography shifts abruptly into steep, ridged terrain, creating a sharp contrast between the saturated lowlands and the higher elevations of the interior.

While largely unpopulated, the area is meticulously partitioned by the Public Land Survey System, including T27s R5e and T28s R5e. These township and range lines provide the only structural grid in a wilderness dominated by natural hydrology. For researchers of Alaskan geography, the map serves as a precise record of the river's channel and the surrounding catchment area as it appeared in the early 21st century.