State park and national lakeshore, southern shore of Lake Michigan , northern Indiana, U.S. The state park (founded 1925) comprises 2,182 acres (883 hectares) of shoreline, marshland, dunes, and forests.
At the Big Blowout in the eastern end of the park, lake winds drift sands over a wooded area, creating a "graveyard of trees"; the dunes may reach heights of 200 ft (60 m). The national lakeshore (founded 1966) encloses the state park on three sides. Now covering more than 12,857 acres (5,205 hectares), it includes beaches and wooded ravines.