Pennsylvania Route 34 (PA 34) is a 62-mile-long (100 km) state route located in southern Pennsylvania. The southern terminus of the route is at U.S. Route 15 Business (US 15 Bus.) in Gettysburg. The northern terminus is at US 11/US 15 south of Liverpool. PA 34 heads north from Gettysburg through farmland in northern Adams County, passing through Biglerville. The route crosses South Mountain into Cumberland County and reaches Mount Holly Springs, where it intersects PA 94. PA 34 heads north into the agricultural Cumberland Valley and heads north to Carlisle, where it has an interchange with Interstate 81 (I-81) in the southern part of town and intersects US 11/PA 74/PA 641 in the downtown area. The route continues north through more rural land and crosses Blue Mountain into Perry County, wh