Michigan State Route 78 runs east-west briefly in Southwestern Eaton County. It runs from Interstate 69, west to the Eaton/Barry County Line. MI St Rt 78 passes through the following town in Eaton County. Bellevue MI St Rt 78 is not multi-plexed in Eaton County. MI St Rt 78 intersects the following highway in Eaton County. Interstate 69, near Olivet.
A BGS on NB I-69. A WB guide marker. The eastern end marker.
