<P> West Virginia has 4 miles (6.4 km) of the trail, not including about 20 miles (32 km) along the Virginia border . Here the trail passes through the town of Harpers Ferry, headquarters of the Appalachian Trail Conservancy . Harpers Ferry is what many consider to be the mental midpoint of the entire A.T., although the actual midpoint is further north in southern Pennsylvania . (The exact midpoint moves due to trail rerouting .) </P> <P> Maryland has 41 miles (66 km) of the trail, with elevations ranging from 230 to 1,880 feet (70 to 573 m). Most of the trail runs along the ridgeline of South Mountain in South Mountain State Park . Hikers are required to stay at designated shelters and campsites . The trail runs through the eastern edge of Greenbrier State Park . This can serve as a luxurious stop point for a hot shower and a visit to the camp store . The trail runs along the C&O Canal Towpath route for 3 miles (4.8 km). Hikers will also pass High Rock, which offers spectacular views and is a popular hang - gliding site . The section ends at Pen Mar Park, which sits on the border of Maryland and Pennsylvania . </P> <P> Pennsylvania has 229.6 miles (369.5 km) of the trail . The trail extends from the Pennsylvania--Maryland line at Pen Mar, a tiny town straddling the state line, to the Delaware Water Gap, at the Pennsylvania--New Jersey border . The Susquehanna River is generally considered the dividing line between the northern and southern sections of the Pennsylvania AT . South of the Susquehanna, the trail passes through Pine Grove Furnace State Park . The Pennsylvania section of the trail north of the Susquehanna, from Duncannon until the Delaware Water Gap, is noted for its eroded and rocky terrain which can slow hiking . </P> <P> New Jersey is home to 72.2 miles (116.2 km) of the trail . The trail enters New Jersey from the south on a pedestrian walkway along the Interstate 80 bridge over the Delaware River, ascends from the Delaware Water Gap to the top of Kittatinny Mountain in Worthington State Forest, passes Sunfish Pond (right), continues north through the Delaware Water Gap National Recreation Area and Stokes State Forest and eventually reaches High Point State Park, the highest peak in New Jersey (a side trail is required to reach the actual peak). It then turns in a southeastern direction along the New York border for about 30 miles (48 km), passing over long sections of boardwalk bridges over marshy land, then entering Wawayanda State Park and then the Abram S. Hewitt State Forest just before entering New York near Greenwood Lake . In New Jersey the New York - New Jersey Trail Conference maintains and updates the Appalachian Trail . </P>

Where does the appalachian trail start in pa