- Historic Sites
Allegheny Portage Railroad National Historic Site
Covering 1249 acres, the park serves as the site of what remains of the Allegheny Portage Railroad, the first incline railroad constructed through the Allegheny Mountains in central Pennsylvania. Completed in 1834, it played a critical role in opening the interior of the United States beyond the Appalachian Mountains to settlement and commerce. Visitors can explore several trails through the forest that lead to notable landmarks of the track.