flows N to Cinder River, on Alaska Peninsula, 34 mi. SW of Ugashik, Bristol Bay Low.
Descriptive name given in 1923 by R. H. Sargent, U.S. Geological Survey (USGS), "because of the ejecta from Aniakchak Volcano which filled its valley and which is now deeply eroded."
Elephant Mountain, Jaw Mountain,
Streams:High Creek, Lava Creek, Meloy Creek, Old Creek, Pumice Creek, Ray Creek, Wiggly Creek,