flows NE to North Fork Fortymile River, 37 mi. SW of Eagle, Yukon-Tanana High. 12 miles long.
Named by prospectors and shown on an 1898 manuscript map by C. A. Woodruff.
Middle Fork Fortymile River, Middle Fork North Fork Fortymile River,
Streams:Anaconda Creek, Bear Creek, Bonton Creek, Buck Creek, Bullion Creek, Butte Creek, Cassiar Creek, Champion Creek, Comet Creek, Confederate Creek, Crazy Wolf Creek, Hilda Creek, Hutchinson Creek, Little Bonanza Creek, Montana Creek, Moose Creek, Sleem Creek,
Valleys: