extend NW from Kuskokwim River to head of Nunsatuk River, 32 mi. NE of Sleetmute and 54 mi. SE of Flat, Kilbuck-Kuskokwim Mts. 10 miles long.
Local name published in 1954 by U.S. Geological Survey (USGS).
Black Mountains,
Swift River, Tatlawiksuk River,