flows SW 44 mi. to Nikolai Slough, 40 mi. SW of Roundabout Mtn., Koyukuk Low.
Koyukuk Indian name reported in 1955 by U.S. Geological Survey (USGS).
Bishop Rock,
Bucket Lake, Louis Lake,
Natlaratlen River, Nikolai Slough,
Whakatna Creek,
Yistletaw,