on W slope of Kuskokwim Mts., at heads of Fourmile and Madison Creeks, 19 mi. NW of Ophir and 47 mi. NW of Mcgrath, Kilbuck-Kuskokwim Mts.
Prospectors name reported in 1933 by U.S. Geological Survey (USGS).
Caribou Mountain, Mount Hurst, Madison Mountain,
Streams:American Creek, Bryan Creek, Deep Creek, Eldorado Creek, Esperanto Creek, Fourmile Creek, Fourmile Creek, Frisco Creek, Frying Pan Creek, Henry Creek, Hurst Creek, Iron Creek, Mammoth Creek, Wilson Creek,