5 mi. apart, each hill about 3 mi. long, S and W of Tonzona River, 45 mi. SE of Medfra and 73 mi. E of Mcgrath, Kuskokwim Low.
Local name obtained in 1958 by U.S. Geological Survey (USGS).
Hwnnaya Chak-,
Dennis Lake,
Birch Hills,
Slow Fork Hills,
Grayling Creek, Pingston Creek,