Meet HL Dee McGrath, 610-331-7410 (C), for a moderate hike in the woods. Meet in the upper parking lot in front of the park office in Ridley Creek State Park Directions: From Route 352, go North on Gradyville Road for 1 mile; turn onto Sandy Flash Road ( Park Entrance) and make a right onto the first road. Proceed to the upper parking lot. Address: ( for entrance is the house across the street from the main park entrance) 351 Gradyville Road, Newtown Square, PA 19073 GPS Coordinates 39.955644,_-75.451609. Bring water and snacks.