Nice web site with lots of information about Mackinac Island.
Other Parks & Trails
St. Ignace Parks & Trails - A few miles away from Mackinaw City across the Mackinac Bridge, St Ignace has a downtown walking route and a biking/hiking/snowmobile trail that stretches to Trout Lake. The town also has parks with views of the Mackinac Bridge and the Straits of Mackinac.
Sault Ste. Marie Attractions, Parks, Trails & More - Sault Ste. Marie is home to the Soo Locks, the Tower of History and other attractions. Trails for biking, jogging, walking, and snowmobiling are also available in the area.