The Appalachian National Scenic Trail, or simply the AT, is a hiker's Mount Everest. The 2,181-mile trail stretches from Georgia to Maine, and about 11,000 people have informed the Appalachian Trail Conservancy that they've completed the epic trek. While some people hike the AT in sections over many years, those known as thru-hikers attempt to complete the entire trail in a single season, a commitment that takes five to seven months. The AT is the world's most famous long-distance hiking trail, but many of its hikers are also well-known — some for their trail exploits, others for their inspiring stories of courage and accomplishment. Here's a look at some of the AT'S most famous hikers.