Not overly technical but still enough challenge to put off some novices. Large rocks and singletrack are common along this trail. It widens in some parts and narrows in others. You should be a strong rider to do this trail or willing to dismount when necessary. Do multiple laps to really give yourself a test.
How to get there:
From Center City Philadelphia: Take the East River Drive to Ridge Ave. Follow Ridge until you reach Roxborough Ave. Make a right turn on Roxborough Ave and follow it until you reach Henry Ave. Follow Henry Ave until you see a sign for Valley Green. Take the Valley Green road until you reach the parking lot.