flows NW to Mastodon Creek, 18 mi.NW of Ophir and 47 mi. NW of McGrath, Kilbuck-Kuskokwim Mts.
Prospectors' name obtained in 1933 by J. R. Mertie, Jr., (in Smith, P. S., 1936, pl. 4), U.S. Geological Survey (USGS).
Mount Hurst, Madison Mountain,
Streams:American Creek, Baker Creek, Beaver Creek, Boob Creek, Bryan Creek, Deep Creek, Eldorado Creek, Esperanto Creek, Frisco Creek, Frying Pan Creek, Hurst Creek, Iron Creek, Ledge Creek, Mammoth Creek, Mastodon Creek, Steel Creek, Wilson Creek,