Heads at 653000N, 1433000W, flows NNE 49 mi, then flows NW 33 mi, where it splits, forming the Grass River and the Sucker River, 16 mi. S of Chalkyitsik; Yukon Flats.
Local name published in 1890 by U.S. Coast and Geodetic Survey (USC&GS). It was often confused with the Big Black (now Black) and Rat Rivers.
Applevun Lake, Big Timber Lake, Chalkyitsik Slough, Chatritt Lake, Jokoei Lake, Mardow Lake, Marten Lake, Ohtig Lake, Tiechovun Lake, Vunle Lakes,
Rivers:Streams: