The southern terminus of the route is at PA 75 in Claylick. The northern terminus is at U.S. Route 30 (US 30) west of Chambersburg. The road carries the names Welsh Run Road, Lemar Road, and Warm Spring Road.
The southern boundary of the route is located at PA 75 in Claylick. The northern boundary is situated at U.S. Route 30 (US 30) west of Chambersburg. This road is known as Welsh Run Road, Lemar Road, and Warm Spring Road.