Isle Royale National Park is a U.S. National Park in the state of Michigan. Isle Royale, the largest island in Lake Superior, is over 45 miles (72 km) in length and 9 miles (14 km) wide at its widest point. The park is made of Isle Royale itself and approximately 400 smaller islands, along with any submerged lands within 4.5 miles (7.24 km) of the surrounding islands (16USC408g).
Isle Royale National Park was established on April 3, 1940, was designated as a Wilderness Area in 1976, and was made an International Biosphere Reserve in 1980.
It is a relatively small national park at 894 square miles (2,320 km2), with only 209 square miles (540 km2) above water. At the U.S.-Canada border, it will meet the borders of the future Canadian Lake Superior National Marine Conservation Area.
Isle Royale National Park is known for its wolf and moose populations which are studied by scientists investigating predator-prey relationships in a closed environment. There are usually around 25 wolves and 1000 moose on the island, but the numbers change greatly year to year. In rare years with very hard winters, animals can travel over the frozen lake from the Canadian mainland.
In the 2006-2007 winter, 385 moose were counted, as well as 21 wolves, in three packs. In spring 2008, 23 wolves and approximately 650 moose were counted.
Isle Royale greenstone (chlorastrolite, a form of pumpellyite) is found here, as well as on the Upper Peninsula of Michigan. It is the official Michigan state gemstone.
The Greenstone Ridge is a high ridge in the center of the island and carries the longest trail in the park, the Greenstone Ridge Trail, which runs 40 miles (60 km) from one end of the island to the other. This is generally done as a 4 or 5 day hike. A boat shuttle can carry hikers back to their starting port. In total there are 165 miles (265 km) of hiking trails. There are also canoe/kayak routes, many involving portages, along coastal bays and inland lakes.
Daily 8am to 4:30pm - July and August