ATC is the only organization solely focused on the protection and management of the Appalachian National Scenic Trail. ATC works with federal and state agency partners and with 30 volunteer A.T.- maintaining clubs to manage the 2,100 mile footpath through the Appalachian Mountains. ATC was founded in 1925 by volunteers who led the way in constructing and marking the footpath. Today volunteers continue to be the heartbeat of the Trail