flows S to Walker Fork, 51 mi. S of Eagle, Yukon-Tanana High.
Named by prospectors and reported in 1898 by E. C. Barnard, U.S. Geological Survey (USGS). So named because the stream is 12 miles up Walker Fork.
Austin Creek, Baby Creek, Bow Creek, Camp Creek, Canyon Creek, Cariboo Creek, Carline Creek, Cherry Creek, Crow Creek, Dakota Creek, Dude Creek, George Creek, Gilliland Creek, Gimlet Creek, Gold Bar Creek, Grace Creek, Hall Creek, Iles Creek, Jack Creek, Jefferson Creek, Juneau Creek, Kal Creek, Leary Creek, Marie Creek, Mariner Creek, McKinley Creek, Ophelia Creek, Owl Creek, Pennington Creek, Robinson Creek, Skukum Creek, Steele Creek, Taylor Creek, Thompson Creek, Turk Creek, Twelvemile Creek, Twin Creek, Twin Creek, Walby Creek, Warner Creek,
Valleys:Fifteen Gulch, Nugget Gulch, Squaw Gulch,
Cities: