Heads in Kilbuck Mountains, at 615500N, 1594500W, flows NW 75 mi to Tuluksak River 7 mi E of Tuluksak and 52 mi SE of Russian Mission.
Local name shown in a 1912 manuscript map by H.W. Reeth as Fogg River. A.G. Maddren, U.S. Geological Survey (USGS), spelled it "Fog" on this 1914 fieldsheet.
Birch Slough, Fog River, Mishevik Slough,
Streams: