The Pennsylvania section of the Appalachian Trail (AT) passes through 229 miles of the southeastern corner of the state. The route follows the northernmost extension of the Blue Ridge and then crosses Cumberland Valley. Past Susquehanna, the trail follows the rim of the east range of the Alleghenies. While there are some relatively easy hiking stretches, part of this section through Pennsylvania is well-known for its boot-bustin rocks. North of the Susquehanna River there are long rocky ridges separated by gaps requiring strenuous climbs up and down. Keep in mind that mid-summer in this part of Pennsylvania can be quite hot and humid; to make it more difficult, water can be challenging to find as well.
The Appalachian Trail, commonly known by backpackers as the AT, is a popular 2,167 mile thru-hike along a wilderness footpath. The Appalachian Trail is a registered National Scenic Trail that winds along the crest of the Appalachian Mountains from Georgia in the south to Maine in the north. More specifically, the AT runs through the scenic wooded and pastoral lands of fourteen eastern US states, stretching from Springer Mountain, Georgia, in the south to Mount Katahdin, Maine, in the north. The Appalachian Trail route is more than 99 percent protected by either federal ownership, state ownership or designated rights-of-way from local land owners.
Overall, Appalachian Trail is the 1st most popular hiking trail of all 32 hikes in Pennsylvania.