Marking the Appalachian Trail in the Great Smoky Mountains National Park. Albert Roth is adding one of the original AT blaze signs to the trail route just south of Clingman's Dome.

Myron Avery during a survey of the route of the Appalachian Trail in the Great Smoky Mountains National Park.

Benton MacKaye, who was first to propose the Appalachian Trail, poses for a photo along the Trail near Newfound Gap in the Great Smoky Mountains National Park on September 24, 1933.

Icewater Spring shelter in the Great Smoky Mountains National Park, crowded with sleeping bags and other hiker gear. Shelters, especially those in high traffic areas like the Smoky Mountains, Shenandoah National Park, and any location close to a road, often see substantial use by short and long distance hikers.