The highway runs from its western terminus at a T-intersection SR 7 approximately 2 miles (3.2 km) 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.

This two-lane state highway primarily serves to connect SR 7 with the village of Orangeville.

Through Orangeville, SR 609 passes by some homes, a few businesses, and finally Andy Dorick Park.

Adjacent to the park, SR 609 comes to an end as it meets Brockway–Sharon Road (CR 182), which straddles the Pennsylvania state line, at a T-intersection located not too far from the northwest corner of Shenango River Lake.

[4] This state route is not included as a part of the National Highway System (NHS).