Isle Royale is the largest island in
Lake Superior, all of which is a
national park. Isle Royale is over 50 miles (80 km) in length and is accompanied by multiple smaller islands, particularly on its northeast end. The island is a part of the state of
Michigan and was once the site of a fishing industry and resort community. Isle Royale National Park was established in
1940. It is a small national park at 572,000 acres, although only 134,000 acres is above water. It is known for its
wolf and
moose populations which are studied by scientists investigating predator-prey relationships in a closed envirnoment. There are usually around 25 wolves and 1000 moose on the island but the numbers change greatly year to year. It is accessible by ferry during the summer months from
Grand Portage, Minnesota and
Eagle Harbor[?] and
Copper Harbor[?] in Michigan.