The highway runs from its western terminus at a T-intersection SR 7 approximately  west of the village of Orangeville to its eastern terminus at the Pennsylvania State line in Orangeville, where SR 609 meets a county-maintained road that straddles the border, Brockway–Sharon Road (County Road 182, or CR 182), at a T-intersection.
The highway's path is described, starting from its western terminus near Orangeville and ending at the Pennsylvania state line in Orangeville. It intersects with SR 609 and County Road 182 (CR 182) to complete its journey.