66 ° 52' 59.999" N,
152 ° 15' 0" W
Yukon-Koyukuk (CA)
1624 ft (495 m)
extend W from Koyukuk River at Bettles to West Fork Henshaw Creek, Brooks Range. 25 miles long.
HistoryNamed in 1885 by Lieutenant Allen (1887, p. 100), USA, "in honor of Senator James B. Beck of Kentucky."