Isle Royale National Park is a U.S. National Park on Isle Royale and adjacent islands in Lake Superior, in the state of Michigan. Isle Royale National Park was established on April 3, 1940; designated as a National Wilderness Area in 1976; and made an International Biosphere Reserve in 1980. The park covers 894 square miles (2,320 km), with 209 square miles (540 km) above water. At the U.S.-Canada border, it meets the borders of the Canadian Lake Superior National Marine Conservation Area.