National Parks near Mason-Dixon Trail, Harford County, Maryland Mason-Dixon Trail Main Page HIGH QUALITY TOPO MAP, CLICK HERE More Information about Mason-Dixon Trail, Harford County, Maryland Nearest metro area is Lancaster, Pennsylvania Click here for more outdoors activities near Lancaster, Pennsylvania General Camping Information List of nearby National Parks: Greenbelt Park, Greenbelt - MD, 58.7 miles away Fort Washington Park, Fort Washington - MD, 72.3 miles away Glen Echo Park, McLean - VA, 73.9 miles away Delaware & Lehigh National Heritage Corridor, Bethlehem - PA, 74.9 miles away New Jersey Coastal Heritage Trail Route, Newport - NJ, 76.1 miles away * Distances listed are direct linear distances, actual travel distance may be different. Go to Maryland Outdoors Index