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The Appalachian Trail is a track across Eastern United States, spanning 2,175 miles. It is commonly regarded as one of the hardest hiking trails across the United States today. The trail passes through the Appalachian Mountains; however, on top of this you will also pass through scenic towns and over beautiful rivers.
from: http://ezinearticles.com/?Appalachian-Trail-Hiking&id=4263392
