East of New Castle and southwest of Slippery Rock, the Slippery Rock Dunes Outdoor Park has a track and trails open to dirt biking. There are about 4 miles of wood trails currently open and 3 large mud pits. The main track has single and double jumps. Plus, there is a peewee track.
The Slippery Rock Dunes Outdoor Park is located at 144 Barron Road in Slippery Rock. To reach the park from US79, use Exit 105. Head east on SR108 (New Castle Road) for about a mile. Turn right heading south on Barron Road to the park.
Overall, Slippery Rock Dunes Outdoor Park is the 21st most popular dirt bike trail of all 32 dirt biking rides in Pennsylvania.