Tionesta Scenic and Research Natural Area

This is true old-growth forest with many ancient and impressively large hemlock trees. At four thousand acres, Tionesta contains the largest tract of old-growth forest in Pennsylvania, and the largest between the Adirondacks and Great Smoky Mountains. Dominant tree species in the areas are eastern hemlock, some more than 400 years old, as well as beech, birch, oak, maple, ash, and black cherry. The large beech trees have mostly succumbed to beech bark disease.

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