Description
Portage Slough is located channel of Yukon River, flows E of unnamed island to Grand Junction point 6 mi. S of Russian Mission, Yukon-Kuskokwim Delta.
History
Local name shown on a 1916 fieldsheet by R. H. Sargent, U.S. Geological Survey (USGS); so called because it leads to the Yukon-Kuskokwim Portage.