Keystone State Park (PA) 
1150 Keystone Park Rd.
Derry, PA 15627
724-668-2939
http://www.dcnr.state.pa.us/stateparks/findapark/keystone/index.htm
State Park: Bike, Birding, Camp, Fish, Hike, Picnic, Walk, Water Sports
Keystone State Park is great for family vacations year-round. Camping, modern cabins, trails of all sorts, a lake, and a swimming beach provide an ideal setting for a summer outing. The park is within easy driving distance from the Pittsburgh metropolitan area and its many attractions.