Pennsylvania is characterized by challenging conditions for hikers, as many leave the state feeling exhausted and injured. The terrain can be tough, leading to physical strain that not only tests hikers' endurance but also their resolve. This is exacerbated by the state's reputedly aggressive rattlesnakes, which pose an additional threat to those trekking through its landscape.

Moreover, the reliability of water sources in Pennsylvania is a significant concern, particularly during the hot summer months. Inconsistent access to water can create hardships for hikers, making the journey even more demanding. Together, these factors contribute to Pennsylvania's reputation as a difficult leg of the Appalachian Trail, as highlighted by Bill Bryson in "A Walk in the Woods."