The trunkline runs to the village of Cass City where it follows Main Street through residential neighborhoods and the central business district. East of Cass City, the highway crosses the Cass River before crossing the county line into Sanilac County.
The trunkline leads to the village of Cass City, traveling along Main Street through residential neighborhoods and the downtown area.  East of Cass City, the highway crosses the Cass River and then enters Sanilac County.