Michigan State Route 103 runs a short distance in St. Joseph County. It runs from the Indiana/Michigan State Line to U.S. Rt. 12 at Mottville. MI St Rt 103 passes through the following town in St. Joseph County. Mottville
MI St Rt 103 is not multi-plexed in St. Joseph County. MI St Rt 103 intersects the following highways in St. Joseph County. U.S. Rt. 12, at Mottville.
NB MI St Rt 103 at the Indiana/Michigan State Line. NB MI St Rt 103 at the Indiana/Michigan State Line. SB MI St Rt 103 south of Mottville. A junction marker on EB U.S. Rt. 12. The northern end of MI St Rt 103 at U.S. Rt. 12 in Mottville. The northern end marker. The northern end of MI St Rt 103. (March, 2024) The northern end marker. (March, 2024) NB MI St Rt 103 at U.S. Rt. 12.
