heads in Muklung Hills and flows SE to Nushagak River, 26 mi. E of Dillingham, Bristol Bay Low. 36 miles long.
Eskimo name written "Ai-u-wath-lok; by H. C. Fasset, U.S. Bureau of Fisheries (USBF), in 1910.
Iowithla River, Keefer Cutoff, Kokwok River, Scandinavian Slough,
Streams:Koggiling Creek, Koklong Creek, Lookout Creek, Lower Klutuk Creek, Portage Creek,
Cities: