Pennsylvania Route 75 (PA 75) is a 71.3-mile (114.7 km) long north south state highway located in central Pennsylvania, USA. The southern terminus is at the Mason-Dixon Line in Montgomery Township, where PA 75 continues into Maryland as Maryland Route 494. The northern terminus is at an interchange with U.S. Route 22 and U.S. Route 322 in Port Royal.PA 75 begins at the Maryland border in Montgomery Township, Franklin County, where the road continues south into that state as MD 494. From the state line, the route heads north on two-lane undivided Fort Loudon Road through open agricultural areas with occasional homes.