trends S to Otter Creek, 3 mi. E of Flat, Kilbuck-Kuskokwim Mts.
Prospectors name reported in 1933 by J. B. Mertie, U.S. Geological Survey (USGS).
Alder Creek, Belle Creek, Black Creek, Boulder Creek, Butte Creek, Caribou Creek, Chicken Creek, First Chance Creek, Flat Creek, Franklin Creek, Granite Creek, Happy Creek, Little Caribou Creek, Little Creek, Little Eldorado Creek, Long Creek, Martin Creek, Moose Creek, Murray Creek, Prince Creek, Slate Creek, Widgeon Creek,
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