Appalachian National Scenic Trail, hiking path, 2,050 mi/3,299 km long, passing through 14 states, E U.S. Conceived in 1921 by Benton Mackaye, forester and regional planner, and completed in 1937, the trail extends along the ridges of the Appalachian Mts. from Mt. Katahdin, Maine, to Springer Mt., Ga. The largest part of the trail passes through 8 natl. forests and 2 natl. parks, but some of its length is still on private property. Hiking and trail clubs maintain shelters and campsites along the path. The trail was designated a natl. scenic trail in 1968.