https://en.wikipedia.org/wiki/Hundred-Mile_Wilderness:  The Hundred-Mile Wilderness is the section of the Appalachian Trail running between Abol Bridge just south of Baxter State Park and Monson in the state of

The Smokies Challenge Adventure Run (SCAR) is a 70+ mile traverse of the Great Smoky Mountains National Park along the Appalachian Trail, starting at Fontana Dam and going to Davenport Gap. The total elevation gain is 18,660', 12,800' in first 40 miles and 5860' in last 30 miles. On course aid and bail-out is only possible at 40 miles at Newfound Gap Road, and maybe not even there. All food and gear must be carried and water must be pulled from streams.