Bark Cabin Natural Area is an 84-acre protected tract in Lycoming County, Pennsylvania, within Tiadaghton State Forest. It preserves a small stand of old-growth forest, including black cherry and aspen trees that are relatively uncommon in the region. Reached by hiking the Mid State Trail from a nearby gravel road, it has a more secluded character than roadside parks or developed recreation sites. Its importance rests in safeguarding a rare remnant of older woodland within the state forest.