Mist emerges from a colorful mountain valley.
West Branch Wilderness Mist from the Susquehanna River viewed from a West Branch Wilderness overlook. © The Nature Conservancy/George C. Gress

With your help, The Nature Conservancy protects critical natural lands and life giving waters in Pennsylvania

Nature Preserves (Closed)

Some of The Nature Conservancy's Pennsylvania nature preserves are closed to the public due to fragile habitat and/or the presence of endangered species.

  • A creek winds through a riverbank covered in straw.

    Acopian Preserve

    Lancaster County/A patchwork of farms, forests and streams provide a combination of natural elements key to one of the state’s most important populations of federally endangered bog turtle. Learn More

  • Two canoes sit on the side of a river bank.

    Butternut Island

    Sullivan County, NY (36 acres)/Located in the Upper Delaware River, this uninhabited island boasts a floodplain forest that includes butternut trees, which are threatened by Japanese knotweed.

  • A gray and white bird sits on a nest.

    Fette Island

    Erie County (42 acres)/Located in the middle of French Creek, Fette Island remains pristine, although the waters of French Creek are threatened by polluted runoff from the surrounding watershed.

  • A bald eagle rests on a branch.

    Long Eddy

    Wayne County (688 acres)/Emerging from steep sandstone and shale slopes, Long Eddy’s wet cliffs nourish one of the only known population of miner’s lettuce in the U.S.

  • Lush forest surrounds a wetland.

    Minsi Lake/Totts Gap

    Northampton County (2K acres)/This collection of forestlands hugging part of the Kittatinny Ridge represents an important wildlife corridor and boasts the largest collections of vernal pools in PA.

  • A salamander with spots rests in moss.

    Mount Bethel Fens

    Northampton County/This complex of globally rare calcareous fens-a turn of the century botanical wonder-will disappear if the delicate balance between water and chemical composition is disrupted.

  • A bush boasts pink flowers in bloom.

    Mount Holly Marsh

    Cumberland County (913 acres)/TNC manages 200 acres of the preserve’s sensitive habitats and rare species in this mini-wilderness that encapsulates what the surrounding South Mountain landscape.

  • A small toad sits on a leaf.

    Mountain Run Ponds

    Franklin & Cumberland Counties (10 acres)/During spring, the base of South Mountain awakes with seasonal vernal ponds that welcome frogs, toads, spring peepers and salamanders who emerge to breed.

  • Gray bats hang from the top  of a cave.

    Richard O. Rowlands Preserve at Aitkin Cave

    Union County (43 acres)/Identified as a premier bat hibernacula in Pennsylvania dating back to the 1930s, Aitkin Cave harbors several species of bats and other unique cave dwelling species.

  • A black and white butterfly rests on dry leaves.

    Westfall Ridge Prairie

    Juniata County (148 acres)/Westfall Ridge Prairie lies atop a limestone ridge that is home to a globally rare rocky glade prairie community that once supported grazing animal herds, including bison.

Other Places We Protect

Sometimes The Nature Conservancy .works in partnership to secure lands and waters that will be protected for Pennsylvanians forever.

  • A creek winds through a snowy landscape.

    Cherry Valley National Wildlife Refuge

    Monroe & Northampton Counties (20,000+ acres)/A large part of TNC's work has focused on successfully establishing a national wildlife refuge with a consortium of local organizations and landowners.