Valley Forge National Historical Park is about 20 miles northwest of Philadelphia. It is a lovely spot for running, with some open, relatively flat trails. There are many trails to choose from in the park, but the signature run is the Joseph Plumb Martin Trail loop trail, which features many of the park’s highlights and monuments. Rolling hills, with one steep hill. The loop is about 6 miles and is accessible from the Visitor Center.
We also have a map of a 6.2 mile trail.