Isle Royale National Park is an American national park consisting of Isle Royale and hundreds of adjacent islands, as well as the surrounding waters of Lake Superior, in the state of Michigan. Isle Royale National Park was established on April 3, 1940, then additionally protected from development by wilderness area designation in 1976, and declared a UNESCO International Biosphere Reserve in 1980. The park covers 894 square miles (2,320 km2), with 209 square miles (540 km2) of land and 685 square miles (1,770 km2) of surrounding waters. The park’s northern boundary lies adjacent to the Canadian Lake Superior National Marine Conservation Area along the international border.
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