flows S from Sirr Mtn. to Seward Creek, 1 mi. W of Wild Lake and 41 mi. W of Wiseman, Brooks Range
Named in 1932 by Robert Marshall, "for Ben Sirr, one of the veteran prospectors of the Koyukuk."
Mathews Dome, Sirr Mountain, Tobin Mountain,
Streams:Deadman Creek, Flat Creek, Lake Creek, Madison Creek, Seward Creek, Sirr Creek, Spring Creek, Surprise Creek, Swamp Creek, Tobin Creek,