The Appalachian National Scenic Trail, generally known as the Appalachian Trail or simply the A.T., is a marked hiking trail in the Eastern United States extending between Springer Mountain in Georgia and Mount Katahdin in Maine. The trail is about 2,200 miles (3,500 km) long and it is the longest hiking trail in the world. More than 2 million people take a hike on part of the trail at least once each year.
Most of the trail is in forest or wild lands--it passes through 14 states: Georgia, North Carolina, Tennessee, Virginia, West Virginia, Maryland, Pennsylvania, New Jersey, New York, Connecticut, Massachusetts, Vermont, New Hampshire, and Maine. en.wikipedia.org
To download GIS data on the Appalachian Tail, go to: http://appalachiantrail.org/home/explore-the-trail/gis-data
Three Videos of this extensive, year round, trail.