Isle Royale National Park Locator Map

Quick Stats

Total Area
571,790 acres
Annual Visitation
14,038 in 2008 (view all years)
Creation Date
March 3, 1931
Entrance Fee
$4 per person per day
Time Zone
Eastern (GMT-4 Daylight, GMT-5 Standard)
Lowest Elevation
601 feet at Lake Superior
Highest Elevation
1,394 feet on Mount Desor
Lowest Average Temp
-3°F in January
Record Low Temp
-43°F in 1996
Highest Average Temp
75°F in July
Record High Temp
95°F in 1995
Our Last Visit
Never

Park Contact Information

Isle Royale National Park
800 E Lakeshore Drive, Houghton, MI 49931
Info at (906) 482-0984
Fax to (906) 482-8753

Park Creation Timeline

1931
On March 3, 1931, President Herbert Hoover signs the legislation authorizing the creation of the park.
1940
On April 3, 1940, President Franklin D. Roosevelt signs the legislation that formally establishes the park.
1980
International Biosphere Reserve status is given to the park by UNESCO (United Nations Educational, Scientific and Cultural Organization).

Animals and Plants

The most common large mammals are moose and gray wolves. The interaction of these two species in the park has been extensivley studied. Other smaller mammals include Isle Royale red squirrels, red foxes, river otters, mink, snowshoe hares, muskrats, beavers, and several species of bat.
Reptiles include several types of snakes, such as common garter, black rat, and northern redbelly. Painted turtles are also present. Amphibians are more common, with several types of salamanders, toads, and frogs.




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