U.S. Federal Route 31 runs north-south through Michigan. This highway runs along Michigan's coast line of Lake Michigan from the Indiana line, near Niles to near the Straits of Mackinac. Info on U.S. Rt. 31 is broken down by county below. Muskegon County Oceana County Mason County Manistee County Benzie County Grand Traverse County Antrim County Charlvoix County Emmet County
