flows SE to Middle Fork Fortymile River, 52 mi. SW of Eagle, Yukon-Tanana High.
Named by prospectors and shown on a 1902 manuscript map by E. J. Chamberlain, U.S. Deputy Surveyor, as "Pittsberg Creek."
Bryan Creek, Chicago Boy Creek, Crab Creek, Fish Creek, Fourth of July Creek, Gold Run, Green Creek, Jim Creek, John Shedd Creek, Little Manila Creek, Little Whiteman Creek, Lousy Creek, Manila Creek, McKinley Creek, Missoula Creek, Pennsylvania Creek, Pittsburgh Creek, Portage Creek, Ruby Creek, Texas Creek, Van Milligan Creek, Watson Fork,
Valleys: