Explore Northern Michigan's 1,600 miles of hiking and biking trails, over 700 miles of rivers, 100 miles of sandy, Lake Michigan shoreline, 16 inland lakes and eight state parks.We have 385 miles of groomed snowmobile trails, 3,000 acres of sand dunes, 950,000 acres of protected & pristine National Forests, and 71,000 acres of Sleeping Bear Dunes National Lakeshore. 

Cited from Michigan.gov