The Appalachian Trail, or AT, stretches more than 2,000 miles along the U.S. East Coast.
Completed in 1937, the longest marked trail in the country runs from Georgia to Maine, connecting 14 states and passing through ridges and valleys of the Appalachian mountain range.
Stretches of the AT are within a couple hours drive for millions of Americans, but few have walked its full length. Each year, thousands of people attempt to hike the entire AT; only one in four succeeds.
National Geographic explored the wooded footpath, traveling south to north, in a 50-minute documentary. You can take the adventure in our slideshow or watch the movie on Netflix.
The Appalachian Trail, better known as the AT, stretches about 2,175 miles along the eastern United States.
The AT runs from Georgia to Maine, making it the longest marked trail in the country, and one of the longest in the world.
The trail cuts through 14 states along the way, including New Jersey, New York, and Connecticut.
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