Heads at 603700N, 14113500W, flows W to the Tana Glacier just N of the Bagley Icefield, 7 mi. S of Needle Mtn., and 40 mi. N of Cape Yakataga, Chugach Mts.
Named by U.S. Coast and Geodetic Survey (USC&GS) field party in 1928 for William "Tomato Bill" Jefferies, a prospector who crossed this area with James Barkley on foot in 1906 or 1907 (Moffit, 1918, p. 77).