Michigan State Route 100 is a north-south highway in Northeastern Eaton County. It runs from Interstate 69, near Potterville, to the Eaton/Clinton County Line. MI St Rt 100 passes throught the following towns in Eaton County. Potterville Grand Ledge MI St Rt 100 is not multi-plexed in Eaton County. MI St Rt 100 intersects the following highways in Eaton County. Interstate 69, near Potterville. Michigan State Route 43, near Grand Ledge.
