In the 19th and early 20th centuries, almost all of Pennsylvania's forests were clear cut, with only a few isolated tracts of virgin forest surviving. The land that became Snyder-Middleswarth Natural Area was purchased by the state in 1902, as part of a larger 14,000 acre (56.66 km) parcel. On April 12, 1921 the governor signed the law creating "Snyder-Middleswarth State Forest Park", making it Pennsylvania's ninth state park. By 1923 the park had a telephone and some structures, and in 1937 the state named it a "Forest Monument" as an "area of botanical or historic interest". In November 1967, the park was named a
National Natural Landmark, as an "outstanding example of a relict forest composed predominantly of hemlock, birch, and pine, with scattered oaks". In 1980 an airplane carrying the
New York Times crashed with one fatality. The crash site is on the summit of Thick Mountain, on the southern edge of the park. the former as part of the state park and the latter as part of Bald Eagle State Forest. While both areas are on Swift Run, Tall Timbers is old second-growth forest. Snyder-Middleswarth's virgin forest is thought to have survived at least in part due to its location and the difficulty of transporting the cut timber, ==References==