While there’s no road map to car-free Mackinac Island, the official Mackinac Island Tourism Bureau web site has lots of resources to help you map out your visit.
Literally, you can find actual maps in the Mackinac Island Guides & Maps: Download Directory. Whether you’re plotting routes for a hike through Mackinac Island State Park or wondering where to find groomed cross-country ski trails for a winter visit, there’s a map to guide your planning.