66 ° 40' 59.999" N,
140 ° 42' 0" W
Yukon-Koyukuk (CA)
1247 ft (380.09 m)
heads at 665200N, 1410300W, flows SE to the Black River, In Canada, 8 mi. E of the Alaska-Canada boundary, 50 mi. NE of Midnight Hill, Porcupine Plateau. Source coords = 66.8639,-141.0397, coords at US-Can bdy = 66.7582,-141.0031. Mouth in Yukon Territory, Can. 25 miles long.
HistoryNamed in 1908 by International Boundary Commission (IBC) surveyors; published in 1914 on International Boundary Commission (IBC) Sheet 12 (1918 Atlas).