The Mustinka River is a tributary of Lake Traverse, 68 mi (109 km) long, in western Minnesota in the United States.

The river flows northward from a Corps of Engineers dam at the north end of Lake Traverse and shortly enters Mud Lake.

Lake Traverse, daughter of Webb and sister of Frank, Reef, and Kit.

Lake Traverse is the location for the Algonquin Radio Observatory.

The Little Minnesota, part of the Mississippi watershed, is less than one mile (1.6 km) from Lake Traverse in the drainage basin of Hudson Bay.

The Little Minnesota River upstream and at a higher elevation near the divide has flooded to a level where it drained across that divide into Lake Traverse.

The distance from Lake Traverse to Big Stone Lake is about five miles (8 km).

The valley floor is crossed by Minnesota State Highway 28, which becomes South Dakota Highway 10 at the south end of Lake Traverse.

Lake Traverse is the southernmost body of water in the Hudson Bay watershed of North America.

Highway 117 serves as a short east-west route between Lake Traverse at the Minnesota / South Dakota state line and the city of Wheaton.