Island national park located in northwestern Lake Superior , northwestern Michigan, U.S. Established in 1931, it has an area of 571,790 acres (231,575 hectares) and includes Isle Royale, the largest island in Lake Superior, measuring 45 mi (72 km) long and 9 mi (14 km) across.
Its forested wilderness, with streams and inland lakes, hosts more than 200 species of birds. Travel is possible only on foot or by canoe, and ferry service is available from mainland Michigan and Minnesota.