Rush Lake (North Dakota)

LocationCavalier County, North Dakota

Coordinates48°54′17″N 98°40′53″W / 48.9046°N 98.6814°W / 48.9046; -98.6814

BasincountriesUnited States

Surface area1,593 acres (6.45 km²)^[1]

Rush Lake
Rush Lake Show map of North Dakota Rush Lake Show map of the United States
Location	Cavalier County, North Dakota
Coordinates	48°54′17″N 98°40′53″W / 48.9046°N 98.6814°W / 48.9046; -98.6814
Basin countries	United States
Surface area	1,593 acres (6.45 km2)[1]
U.S. National Natural Landmark
Designated	1975

Rush Lake is a body of water in Cavalier County, North Dakota, United States. It is defined as a prairie pothole. The pothole is located south of the Canada–United States border, near the town of Langdon. In private ownership as of 2025, the body of water was listed as a National Natural Landmark in 1975.