Flows NE to the Kukpuk River S of its junction with Kakpeyak River, 3.4 mi W of Saklolik Mountain and 16 mi ENE of Cape Thompson.
Named in 1960 by Project Chariot personnel.
Guard Hill, Kisimilok Mountain, Mapsorak Hill, Mapsorak Mountain, Saklolik Mountain, South Maktak Hills, Talaverat Hill,
Lakes:Atosik Lagoon, Mapsorak Lagoon,
Locales:Mountains:Angmakrok Mountain, Maktak Mountain, Sakpik Mountain,
Ridges:Sigrikpak Ridge, Tinguk Ridge,
Rivers:Streams:Aniyuyaktuvik Creek, Battery Creek, Gulo Creek, Igruwotalik Creek, Inuktak Creek, Kiktoya Creek, Kisimilok Creek, Kuropak Creek, Mapsorak Creek, Phosphorite Creek, Saligvik Creek, Tukingarok Creek, Wolf Creek,
Valleys: