flows SE to Dietrich River, 13 mi. N of head of Koyukuk River, 42 mi. NW of Chandalar, Brooks Range. 6 miles long.
Named by Robert Marshall about 1930 "for a well-known Eskimo hunter, his neighbor in Wiseman;" shown by Marshall as both "Bigjim" and "Big Jim."
Dillon Mountain, Snowden Mountain, Table Mountain,
Rivers:Bettles River, Dietrich River,
Streams:Big Jim Creek, Kalhabuk Creek, King Creek, Kuyuktuvuk Creek, Nutirwik Creek, Snowden Creek, Trembley Creek,