The Appalachian Trail is the most famous hiking trail in the world. It runs from Maine in the north of the United States to Georgia in the south.
Some people try to walk the entire 2,174 mile trail over several months. Others simply enjoy day-trips to parts of the AT.
The Appalachian Trail is currently protected along more than 99 percent of its course by federal or state ownership of the land or by right-of-way. Annually, more than 4,000 volunteers help maintain the trail.
In the course of its journey, the trail follows the ridgeline of the Appalachian Mountains, crossing many of its highest peaks, and running, with only a few exceptions, almost continuously through wilderness.