Thank you Michigan DNR. Here is an interactive tool that lets you find snowmobile trails by Region within the State. Then use the Zoom and Snapshot features within Acrobat Reader to size and print the map to meet your needs.
The DNR says, “These maps are accurate as of the most recent date specified. The State Designated Snowmobile Trail information is updated regularly by the Michigan Department of Natural Resources (DNR) as new trail additions, re-routes, and closures are completed. Please return to this site and review the update dates for each map to make sure you have the most recent version available.”
You will need the most recent version of Acrobat Reader.