distributary heads at Kanektok River, flows W to Kuskokwim Bay, 50 mi. NW of Goodnews, Yukon-Kuskokwim Delta.
Name derived from former Eskimo village of Oyak; published in 1951 by U.S. Geological Survey (USGS).
Ithagsutlek Lake, Tsingigkalik Lake,
Rivers:Kanektok River, North Mouth Arolik River, South Mouth Arolik River,
Streams:Kanagtatlek Creek, Kikku Creek, Nakee Creek, North Branch Warehouse Creek, Oyak Creek, Sayalik Creek, South Branch Warehouse Creek, Stoggnang Creek, Tungak Creek, Warehouse Creek, Weelung Creek,