Description
Dietrich River is located flows S to join Bettles River to form Middle Fork Koyukuk River, 4.5 mi. NW of Wiehl Mtn. and 35 mi. WNW of Chandalar, Brooks Range. 35 miles long.
History
Local name shown on an 1899 fieldsheet by T. G. Gerdine, U.S. Geological Survey (USGS).