Cook Forest State Park encompasses 11,536 acres in northwestern Pennsylvania. Bordered by the picturesque Clarion River, the park is most known for virgin white pine, and hemlock timber stands. Classified as a National Natural Landmark by the National Park Service, Cook Forest State Park is often referred to as the “Black Forest” of Pennsylvania. Cook Forest State Park is open year-round. A trail system of 52 miles reaches magnificent timber stands. Family camping, organized group tenting and log cabins are available. Fishing, picnicking, swimming, and canoeing are popular summer pursuits. Winter activities include cross-country skiing, snowmobiling, sledding and ice-skating.