Michigan State Route 103 runs briefly in southeastern Cass County. It goes from the Indiana/Michigan State Line to the Cass/St. Joseph County Line. MI St Rt 103 does not pass through any towns in Cass County. MI St Rt 103 is not multi-plexed in Cass County. MI St Rt 103 does not intersects any highways in Cass County.
NB MI St Rt 103 at the Indiana/Michigan State Line.
