The 148-mile Horse-Shoe Trail runs from Valley Forge to the Appalachian Trail, just north of Harrisburg
The 199-mile Mason Dixon Trail connects the Appalachian Trail in Cumberland County to the Brandywine Trail in Maryland.
The 12.6 Green Ribbon Trail runs from Upper Gwynedd to Whitemarsh, along the Wissahickon Creek.
The Natural Lands Trust has 42 nature preserves in the Philadelphia suburbs, many of which have hiking trails open to the public. The site offers details on trails, amenities and events. NLT also has a mobile app, Explore NLT.
The 14-mile Chester Valley Trail runs from Exton Park to King of Prussia. Plans are to extend the trail from Norristown to Downingtown, via a railroad corridor
The Cynwyd Heritage Trail is a 1.8 mile rail trail in Lower Merion that follows SEPTA’s Cynwyd Line from Cynwyd Station to Belmont Avenue.
The Delaware Canal Towpath runs along the Delaware Canal from Bristol to Easton and is part of the 165-mile D&L Trail.
The 20-mile trail crushed stone (paved in sections) Perkiomen Trail runs from Oaks to Green Lane Borough, mostly along the rail bed of the old Perkiomen Line of the Reading Railroad
The 18-mile, asphalt Schuylkill River Trail runs from Philadelphia to Mont Clare on the Pennsylvania Railroad right-of-way. The plan is to extend the trail to 115 miles, running from Pottsville (Schuylkill County) to Philadelphia.
This 8.4 mile paved trail runs parallel to Route 202 from Montgomery to Doylestown.
This 10+ mile crushed stone and asphalt trail runs from Bellevue State Park on the Delaware River to Brandywine Creek in Wilmington, DE.
A former rail line between Philadelphia and Delaware, the 4 mile trail runs between the University of Delaware in Newark, to White Clay Creek State Park.