Heads at glacier, flows NNW to the Tonzona River, 20 mi. SE of its junction with East Fork Kuskokwim River, 47 mi ESE of Medfra, Kuskokwim Low.
Local name reported in 1958 by U.S. Geological Survey (USGS).
Hwnnaya Chak-,
Dennis Lake, Grayling Lake,
Birch Hills,
Slow Fork Hills,
Grayling Creek, Pingston Creek,