Alleghenies -

: The bedrock is primarily sandstone and quartzite, which are extremely resistant to weathering. Outdoor Recreation & Rail Trails

: A massive protected area in Pennsylvania offering thousands of miles for hiking, camping, and wildlife watching . Historical and Industrial Legacy alleghenies

: A flat, well-maintained trail between Ohiopyle and Confluence that follows beautiful rapids and connects to the broader Allegheny Highlands Trail . : The bedrock is primarily sandstone and quartzite,

The mountains have shaped American industry and transportation: Geological and Natural Highlights

: An 17.6-mile trek through history featuring two dark, damp, and abandoned tunnels (Sideling Hill and Ray's Hill) left behind when the highway was rerouted.

The Alleghenies are a hub for hiking and cycling, often utilizing abandoned railroad corridors that once breached the mountain barrier:

The —often called the Alleghenies—form the rugged western-central portion of the Appalachian Mountains . Historically a formidable barrier to westward travel, they now serve as a premier destination for outdoor recreation, stretching approximately 300 to 400 miles from north-central Pennsylvania through western Maryland and eastern West Virginia. Geological and Natural Highlights