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Arguably the most famous long-distance trail in the world, the Appalachian Trail runs for approximately 2,200 miles from Springer Mountain, Georgia to Mt. Katahdin and Maine. Marked by iconic white blazes, the trail attracts 2 million hikers annually, including some two-thousand would-be thru-hikers. Part of the trail within Great Smoky Mountains National Park, the most visited in the country, is perfect for majestic fall foliage displays.