This undated photograph shows hikers stopping at the Ney lean-to (shelter) at Ney's Gap near Schuylkill, Pennsylvania. This shelter has been removed, but was not far from the current Eagle's Nest Shelter.

Smith Gap Shelter (Pennsylvania) under construction in 1948. The was built by members of the Philadelphia Trail Club and was opened to hikers on June 12, 1949. The shelter was built on private land, but in the late 1960s the landowner decided to build a vacation home on the site and turned the shelter into a storage shed. At this time, the Delaware Valley Chapter of the AMC had taken over supervision of the Appalachian Trail in the area from the Philadelphia Trail Club, and Chapter members built a new shelter closer to the Trail in 1973. They dedicated the shelter to their long serving volunteer LeRoy Smith, who passed away shortly after the completion of the current structure.

The Applebee Cabin in Pennsylvania during a weekend hike by members of the Philadelphia Trail Club. The cabin was located on the Appalachian Trail north of what is now the Hertlein Campsite (formerly the Hertlein Cabin), but was removed in 1971 due to excessive vandalism of the structure. The cabin was built in 1930 by the Blue Mountain Eagle Climbing Club and was maintained by the club until its removal from the Trail.

A member of the Philadelphia Trail Club clipping vegetation along the Appalachian Trail, March 23, 1935, on the Little Gap, PA section of the Trail. Club members "cut scrub oak and cleared nearly half a mile through the thickest growth," and later, "paint[ed] blazes all the way through to meet the blazes in from Smith Gap," according to a report of the trail work weekend. This work weekend was one of many that the Philadelphia Trail Club utilized to build their short section of the Trail in 1935.

The Antietam Shelter, located in the Mont Alto (now MIchaux) State Forest (PA), was built by the Civilian Conservation Corps (CCC) in 1936. It is located on the banks of Little Antietam Creek. Maintained by the Potomac Appalachian Trail Club, this shelter is slated to be moved to a new location, possibly on the Tuscarora Trail, in the near future, due to its proximity to the popular Old Forge Picnic Grounds.

The George W. Outerbridge Shelter on the Appalachian Trail, June 1, 2005. The shelter is named for George Outerbridge, the second person (after Myron Avery) to hike all the sections of the Appalachian Trail. Outerbridge began his section hiking on October 30, 1932, and completed his final section on June 22, 1939.

This shelter is located on the first stretch of the Trail that Outerbridge hiked and is maintained by the Allentown Hiking Club. The Club is a member of the Keystone Trail Association and the Appalachian Trail Conservancy. The Club, founded in 1931, maintains 10.3 miles of the Trail and has two shelters -- this one, and the Allentown Hiking Club Shelter.

Allentown Hiking Club Shelter on the Appalachian Trail, June 2, 2005. The Allentown Hiking Club is a member of the Keystone Trail Association and the Appalachian Trail Conservancy. The Club, founded in 1931, maintains 10.3 miles of the Trail and has two shelters -- this one, and the G.W. Outerbridge Shelter.

This 1938 map of the Appalachian Trail from the Susquehanna River to the Virginia/Tennessee border, appeared on the back of the stationary of the Appalachian Trail Conference beginning in the late 1930s. It describes those portions of the Trail covered by the PATC's Guide to Paths in the Blue Ridge: Measured Distances and Detailed Directions for 506 Miles of the Appalachian Trail and 65 Miles of Side Trails in Virginia and Adjacent States, originally published in 1931 and reprinted numerous times since. The route of the Trail in 1938, especially in southern Virginia, is quite different from the current route.