Editing Wissahickon Valley (section)

== Geography ==

The Wissahickon Creek flows approximately 24 miles from its headwaters in Montgomery County to its confluence with the Schuylkill River near the Philadelphia Museum of Art. The creek's lower seven miles, within Philadelphia, have carved a deep gorge through the bedrock, creating dramatic terrain with steep hillsides, rock outcrops, and the creek itself cascading through the valley.<ref name="wiss"/>

The Wissahickon schist—the gray metamorphic rock visible throughout the park—gives the area its distinctive appearance. Outcrops along hillsides, boulders in the creek, and exposed rock faces create a rugged landscape that contrasts with Philadelphia's urban surroundings.<ref name="wiss"/>