Michigan State Route 66 is a north-south highway in Calhoun County. It is the main highway in the western portion of the county. MI St Rt 66 passes through the following towns in Calhoun County. Athens Battle Creek
MI St Rt 66 is multi-plexed in Calhoun County. Interstate 194, at Battle Creek.
A exit guide sign on WB I-94. NOTE: The space for a I-194 shield. NB I-194/MI St Rt 66 north of I-94. A junction marker on WB MI St Rt 96. A set of guide markers on WB MI St Rt 96. NB I-194/MI St Rt 66 north of MI St Rt 96. A guild marker in Battle Creek. A guild marker on BUSN Loop I-94 in Battle Creek.
