Appalachian Trail (AT)

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The Appalachian Trail runs 2,198 miles from Springer Mountain, GA to Mount Katahdin, ME through 14 states along the Appalachian mountain range. It is the world's most hiked long trail — roughly 3,000 people attempt a full thru-hike each year, about 25% complete it. White paint blazes mark the route throughout. Northbound thru-hikers start February–April to arrive at Katahdin before fall closures. About 260 three-sided shelters with tent sites and water are spaced along the route. Katahdin requires advance reservation and closes seasonally — timing is critical for NOBO finishers.