Forrest H. Duttlinger Natural Area

Forrest H. Duttlinger Natural Area is a protected forest in Clinton County covering roughly 1500 acres of woodland. A 64-acre section contains old-growth trees including eastern hemlock, American beech, black cherry, sugar maple, and northern red oak growing across varying elevations.

A surveying mistake by lumber companies in the early 1900s accidentally prevented this forest section from being cut down. This oversight led to later protection efforts through Forrest H. Duttlinger's conservation work.

This place functions as a learning space for those studying forests and conservation, where visitors can see how different forest management approaches shape the landscape. The preserved old-growth section demonstrates why protecting mature trees matters to local ecosystems.

The trails cross through varying terrain with wet sections and elevation changes, so sturdy footwear and preparation are essential for safe exploration. Visitors should expect longer hikes and changing conditions, particularly when heading toward the oldest forest sections.

Several of the oldest hemlock trees in this area measure more than 4 feet (1.2 m) across, placing them among the largest specimens in the region. These giant trees represent a rare concentration of such old growth in Pennsylvania woodlands.

Location: Pennsylvania

GPS coordinates: 41.47100,-77.87800

Latest update: December 14, 2025 17:40