Heads in the Kemegrak Hills, flows SW to Aiautak Lagoon, 9.6 mi NW of Cape Thompson, Arctic Slope.
HistoryEskimo name recorded in 1960 as "Nalakachaek" by D. C. Foote in connection with Project Chariot studies.
Cape Thompson, Kowtuk Point, Sinigrok Point,
Cliffs:Hills:Akoviknak Mountain, Angayukak Hill, Inukpak Rock,
Lakes:Aiautak Lagoon, Akoviknak Lagoon, Kemegrak Lagoon, Lake Makpik, Tusikpak Lake,
Streams:Agarak Creek, Akalolik Creek, Angayukak Creek, Ibrulikorak Creek, Iglupak Creek, Ikijaktusak Creek, Isuk Creek, Kugirarok Creek, Kunuk Creek, Nalakachak Creek, Taktelak Creek,