or Sag River (Iñupiaq: Saġvaaniqtuuq) is a stream in the North Slope Borough of the U.S. state of Alaska.

The Trans-Alaska Pipeline System and Dalton Highway roughly parallel it from Atigun Pass to Deadhorse.

[5] A glaciation happened approximately at the same time as the Illinoian Stage of central North America at the Sagavanirktok River.

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