Hammersley Wild Area is a 30,253-acre protected tract in Susquehannock State Forest in north-central Pennsylvania, spanning parts of Potter and Clinton counties. It is the state’s largest roadless area and second-largest wild area. Shaped on the Allegheny Plateau over rock formed about 300 million years ago, the land was heavily logged and clearcut around 1900, with railroads and a small town once present. After decades as a proposed wild landscape, it was formally established in 2004 when the state acquired key mineral rights. Today it is protected from development, supports low-impact recreation, and preserves a largely mature second-growth forest with notable wildlife, trails, and nearby old-growth stands.