Imuruk Lake (Inupiaq: Imaġruk or Narvaġruk) is the largest body of fresh water in Seward Peninsula in the U.S. state of Alaska.

It measures 31 square miles (80 km2) and has a drainage basin of 102 square miles (260 km2), It lies on top of a lava plateau at an elevation of 960 feet (290 m).

The drainage basin is relatively flat, as the maximum elevation is only about 1,600 feet (490 m).

The Fairhaven Ditch takes practically all its water from the lake.

[2] This article incorporates text from this source, which is in the public domain: US GPO's "Congressional serial set" (1913)