A member of the Philadelphia Hiking Club resting along the Appalachian Trail near Smith Gap, April 19, 1935.

Members of the Philadelphia Trail Club at an unidentified Appalachian Trail shelter, Easter Weekend, 1933. At the far right is Mary Kilpatrick, the first woman to hike every step of the Trail and a long-time leader of the Philadelphia Trail Club.

The man on the left is George W. Outerbridge, the second person to hike every step of the Appalachian Trail after Myron Avery. He is standing next to Mary's husband, Martin Kilpatrick, and, like Mary, a leader of the Philadelphia Trail Club.

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.

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.