flows SW joins Slate Creek to from North Fork Fortymile River, 37 mi. SW of Eagle, Yukon-Tanana High. 14 miles long.
Named by prospectors and reported in 1904 by D. C. Witherspoon, U.S. Geological Survey (USGS).
Middle Fork Fortymile River, Middle Fork North Fork Fortymile River,
Streams:Bryan Creek, Caribou Creek, Fourth of July Creek, Happy New Year Creek, Independence Creek, Lousy Creek, Merry Christmas Creek, Ole Creek, Slate Creek,