The Tumbling Run Shelter in the Mont Alto (now Michaux) State Forest (PA) was built in 1936, by the Civilian Conservation Corps (CCC). The original structure was torn down and rebuilt in the 1980s by the Potomac Appalachian Trail Club, as a pair of shelters, in keeping with the other shelters in this stretch of the Appalachian Trail.

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.