Streams are swift and meandering. A few oxbow and thaw lakes occur in the valleys, whereas some cirque lakes are located in the glaciated mountains. Permafrost underlies most lowland soils and high mountains, but is absent in soils covered by forests or by grasses and alders. Glaciers are not present. Wetlands occupy up to 53 percent of the area.
Wildfires are frequent events.
Subsistence and recreational hunting and fishing are the main human uses. Mining was formerly important. Koyukon, Holikachuk, and Ingalik Athabaskans reside in this Section. Compiled by Alaska Region. Nushagak-Lime Hills Geomorphology.