Sturgeon Lake (Oregon)

Sturgeon Lake is a lake on Sauvie Island in the U.S. state of Oregon. Named for its historical population of sturgeon, it is the largest lake on what is one of the largest river islands in the United States. Located within the Sauvie Island Wildlife Area, the lake is a critical habitat within the Pacific Flyway for migratory waterfowl, hosting over 200,000 birds annually.

In recent decades, the lake has had a number of environmental problems, beginning with the fact that it is filling in with silt. Its only remaining inflows and outflows are the Gilbert River and Dairy Creek, the latter of which is significantly reduced in flow. The lake has also sometimes been closed due to toxic algae blooms.