Indiana Dunes National Lakeshore is a unit of the National Park System designated as a U.S. National Lakeshore located in northwest Indiana and manage

It was authorized by Congress in 1966. The national lakeshore runs for nearly 25 miles (40 km) along the southern shore of Lake Michigan, from Griffith, Indiana, on the west to Michigan City, Indiana on the east. The park contains approximately 15,000 acres (6,100 ha).