In Philadelphia?... There isn't any. At least nothing worth your time. http://www.youtube.com/watch?v=Q0X0mUCYfWA Outside of Philly there is a climbing area called Birdsboro. http://www.rockclimbing.com/routes/North_America/United_States/Pennsylvania/Southeastern_Region/Birdsboro/ But....If your looking for good climbing.... Look FURTHER! Go to the new river gorge in West Virginia. Its about 6 hour drive from philly but well worth it. http://www.rockclimbing.com/routes/North_America/United_States/West_Virginia/South-_New_River_Gorge/ Though be warned... Summer is not the best season for the "New" I would go to Rumney which is in New Hampshire and is about a 6 hour drive. http://www.rockclimbing.com/routes/North_America/United_States/New_Hampshire/Grafton_County/Rumney/ But if quality is not an issue.... go to the bridge
sport climbing in philadelphia