Meet HL John Odell 484-885-6205 at the park office at 9:30 AM, for a hike on various trails in the park. Directions: From Rt. 352, go north on Gradyville Road for 1 mile; turn right onto Sandy Flash Road (park entrance gate) and right onto the first road to the upper parking lot. Google Maps: XG2X+76 Glen Mills, PA. Bring water and a snack. Address: (for the house across the street) 351 Gradyville Road, Newtown Square, PA 19073 GPS Coord: 39.955644, -75.451609. Bring water and a snack.