Isle Royale National Park

Isle Royale National Park
IUCN category Ib (wilderness area)
Site of the historic Edisen Fishery
Location in Lake Superior in Michigan Show map of Michigan Location in the United States Show map of the United States
Location	Keweenaw County, Michigan, United States
Nearest city	Thunder Bay, Ontario
Coordinates	48°01′N 88°51′W / 48.01°N 88.85°W / 48.01; -88.85
Area	571,790 acres (2,314.0 km2)[1]
Established	April 3, 1940
Visitors	28,965 (in 2023)[2]
Governing body	National Park Service
Website	Isle Royale National Park

Minong
U.S. National Register of Historic Places
U.S. Historic district
Siskiwit Bay
Area	189,665 acres (76,755 ha) [133,788 acres (54,142 ha) land and 55,877 acres (22,613 ha) water]
NRHP reference No.	100003341[3]
Added to NRHP	January 24, 2019

Isle Royale National Park is an American national park consisting of Isle Royale, along with more than 400 small adjacent islands and the surrounding waters of Lake Superior, in the state of Michigan.

Isle Royale is 45 mi (72 km) long and 9 mi (14 km) wide, with an area of 206.73 sq mi (535.4 km²), making it the fourth-largest lake island in the world. In addition, it is the largest natural island in Lake Superior, the second-largest island in the Great Lakes (after Manitoulin Island), the third-largest in the contiguous United States (after Long Island and Padre Island), and the 33rd-largest island in the United States.^[4]

Isle Royale National Park was established on April 3, 1940, then additionally protected from development by wilderness area designation in 1976, declared a UNESCO International Biosphere Reserve in 1980, and added to the National Register of Historic Places in 2019 as the Minong Traditional Cultural Property. The park covers 894 sq mi (2,320 km²), with 209 sq mi (540 km²) of land and 685 sq mi (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. With 25,894 visits in 2021, it is the seventh least-visited National Park in the United States.^[5]