Abandoned mine tunnels lie beneath Hillside Campground and the cabin area. Both mines had ceased operations by 1945. A second mine, Salem #2, was in operation by the 1910s. Keystone Coal and Coke Company constructed Keystone Lake in the early 1900s for use in washing coal extracted from a nearby coal mine known as Salem #1 and quenching its coke ovens. The park also has extensive picnic areas and several miles of hiking trails. Its main attraction is the man-made 78-acre (32 ha) Keystone Lake. Route 22 near New Alexandria, the park opened in 1945. Keystone State Park is a 1,200-acre (486 ha) Pennsylvania state park in Derry Township, Westmoreland County, Pennsylvania in the United States. Pennsylvania Department of Conservation and Natural Resources Keystone State Park (Pennsylvania) (the United States) Show map of the United Statesĭerry, Westmoreland, Pennsylvania, United StatesĤ0☂2′19″N 79☂2′59″W / 40.3719°N 79.3831°W / 40.3719 -79.3831
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