The route begins on the Ohio state line over Lake Pymatuning in North Shenango Township, at the terminus of SR 85.

The route heads east, going in and out of Pymatuning State Park before short concurrencies with US 6, and US 322/PA 18 in the town of Conneaut Lake.

After exiting the town to the south, the route winds southeast to the intersections of US 19 and I-79 in Greenwood Township.

The route continues east for several miles before terminating in the town of Cochranton, at an intersection with PA 173.

In the early 1970s, the route was moved from its old alignment from Hartstown Road to Conneaut Lake, where it previously had a concurrency with US 322 into the town.