extends NE-SW between Koyukuk River and its South Fork, 10 mi. E of Bettles, Brooks Range. 16 miles long.
Local name reported in 1956 by U.S. Geological Survey (USGS).
Jim River, Middle Fork Koyukuk River, North Fork Koyukuk River,
Streams:Eldorado Creek, Florence Creek, Harriet Creek, Pope Creek, Squaw Creek,