The Birch Run lean-tos were built in 1934 by workers from the Civilian Conservation Corps (CCC) in the Michaux State Forest in Pennsylvania. Like other shelters in this stretch of the Trail, these lean-tos were constructed in pairs of smaller shelters, rather than as one larger shelter. The original structures were torn down in the 1980s, and replaced with a single, larger shelter. These shelters were and the new shelter is maintained by the Potomac Appalachian Trail Club (PATC).

The Racoon Run Shelters in the Michaux State Forest (PA), were built by workers from the Civilian Conservation Corps (CCC) in 1934. Smaller than the standard Appalachian Trail lean-tos built at this time, the paired shelters in this stretch of the Trail in Pennsylvania are unique along the Trail. The Raccoon Run Shelters were maintained by the Potomac Appalachian Trail Club, but they were torn down in the 1980s when the AT was relocated away from its current route. The Raccoon Run Shelters were among those too close to the road, and often frequented by non-hikers.

The map shown here is from the PATC Map No. 4 (1980) and it depicts the location of the shelters on the old route of the AT. This image was provided by Stuart O. Smith, Jr.

The Quarry Gap shelters in Michaux State Forest (now Caledonia State Park) were built in 1934 by workers from the Civilian Conservation Corps (CCC). The trail shelters in Michaux State Forest at this time were unique in that they were built as pairs of smaller structures rather than one larger lean-to. At some point in their history, the Quarry Gap shelters were re-roofed with a single, continuous roof, providing shelter for hikers between the two structures. These shelters are maintained by the Potomac Appalachian Trail Club.

The Milesburn Shelter (now Cabin) is located in the Michaux State Forest in southern Pennsylvania and is maintained by the Potomac Appalachian Trail Club (PATC). Built in 1930 as a park ranger cabin, Milesburn was converted to an Appalachian Trail shelter by the PATC a few years later. It is one of the locked cabins along the AT between Waynesboro, Virginia and Duncannon, Pennsylvania that hikers can reserve in advance for a fee.

The Deer Lick Run Shelters in the Michaux State Forest in Pennsylvania were built after the removal of the Mackie Run Shelter in the early 1980s. Although these are newer structures, they are built in the same paired shelter style of many of the original lean-to shelters in this stretch of the Trail. These shelters are maintained by the Potomac Appalachian Trail Club (PATC).

Rebecca Wight (deceased) and Claudia Brenner, a couple followed and shot at eight times by Stephen Roy Carr on the Trail in May, 1988.