- Phone: 302-654-4707
- Email: delaware@tnc.org
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Thanks to your help, we have protected more than 30,000 critical acres across Delaware since 1990.
In addition to providing healthy and resilient habitats for a wide variety of wildlife, The Nature Conservancy's preserves in Delaware are the perfect destinations to enjoy the outdoors. Whether you’re looking to spot migratory birds, walk through coastal hardwood forests, or take your kayak along the Broadkill River, one of our public preserves has you covered!
Public Preserves
Become a Volunteer Monitorer
You can help us protect nature!
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Preserve Monitoring
We need volunteers to help us monitor our public preserves. Monitors can use an app to log information and keep us informed of new issues like downed trees across the trails or other maintenance needs. Learn more by downloading the form.
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Other TNC Managed Preserves in Delaware
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Bullseye-Ferry Landing Preserve
Sitting along the Indian River in southeastern Sussex County, Bullseye-Ferry Landing is a mosaic of diverse living communities. Learn More About Bullseye Ferry Landing Preserve
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Middleford North Preserve
Middleford North is located just upstream from Seaford, where the main stem of the Nanticoke River meanders through riparian forest and lush freshwater wetlands. Learn More About Middleford North Preserve
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Milford Neck Preserve
With miles of undeveloped beaches and dunes, vast tidal marshlands, swamp and upland forests and a patchwork of agricultural lands, the Milford Neck offers natural beauty and biological diversity. Learn More About Milford Neck Preserve
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Pemberton Forest Preserve
Pemberton Forest provides unbroken forest needed by migrating birds and wide-ranging species. The 908-acre Ponders Tract is open to the public, while the Pemberton Tract is not. Learn More About Pemberton Forest Preserve
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Sowbridge Branch Preserve
This 1.12 acre parcel was donated by the Greenly family in 1990 to become TNC's first preserve in Delaware. The site is dominated by Atlantic white cedar swamplands and bog like habitats.
Partnerships in Protection
Explore some additional public preserves TNC has had a hand in protecting.
Auburn Valley State Park Expansion
Delaware Department of Natural Resources and Environmental Control’s (DNREC) Division of Parks & Recreation announced in April 2019 that it acquired 86 acres of land in Yorklyn to expand Auburn Valley State Park. The preservation of the two parcels, each about 43 acres in size, will enable future expansion of recreational activities at the 452-acre park. The land acquisition by DNREC will also benefit the Red Clay Creek watershed by protecting important headwaters and lands along a tributary to the creek. Funding for the purchase was provided by the State of Delaware’s Open Space Program, The Nature Conservancy, the Reynolds Cooch family and Mt. Cuba Center.
Oversee Farm
Now part of Auburn Valley State Park, Oversee Farm is a 121-acre property near Yorklyn, DE. In 2003, the State purchased a conservation easement on the Oversee Farm using Department of Transportation (DOT) scenic easement funds and Open Space funds. At the same time, TNC purchased the underlying fee interest in the property. In December 2006, the Division of Parks and Recreation assumed ownership of the property after acquiring the fee interest from TNC. The property now contains paved trails among open fields and a historic farmhouse and barn.
Port Mahon
In eastern Kent County along the Delaware Bay, tidal saltmarshes and mudflats contained within the 341-acre Port Mahon Preserve provide a sanctuary for numerous species of geese, duck, fish and amphibians. This Preserve was transferred to the U.S. Fish & Wildlife Services to become part of Bombay Hook National Wildlife Refuge.
Marian Okie Memorial Wildlife Preserve
This 118-acre property containing tidal salt marsh, wetlands, coastal forest and fields, is located on Indian River Bay in Sussex County. The property was originally donated by Austin F. “Pete” Okie to The Nature Conservancy before it was transferred to the State of Delaware’s Division of Fish & Wildlife. It is now considered part of the Assawoman Wildlife Area and is publicly accessible though a Conservation Access Pass is required to visit.
Protecting the property as a wildlife habitat was intended to benefit the region by limiting the encroachment of development and minimizing contributions of pollutants to Indian River Bay, as well as providing sanctuary to a wide range of species. This tract of land is home to a variety of plants and animals including great blue herons, ospreys and mourning doves, as well as fiddler crabs, monarch butterflies and diamondback terrapins.
