The northern terminus is the Ohio state line in South Pymatuning Township.

The route passes through agricultural areas prior to crossing the Shenango River into the borough of Wheatland.

The road enters the city of Farrell and turns to the north, continuing to the west of developed neighborhoods and to the east of the Norfolk Southern railroad line as it passes more industry, including a large steel mill.

The road passes through industrial areas along the western bank of the Shenango River, crossing Norfolk Southern's Meadville Line.

PA 718 turns northwest onto Tamarack Drive and passes through a mix of woods and farms with a few homes, reaching the Ohio border.