Prime Hook National Wildlife Refuge encompasses more than 10,000 acres of freshwater and tidal wetlands, forested uplands, Atlantic barrier beach, and managed impoundments along the Atlantic Flyway in Sussex County, Delaware, between Lewes and Milford. Administered by the U.S. Fish and Wildlife Service, the refuge was established in 1963 to provide critical migratory bird habitat and has become one of Delaware's premier wildlife observation destinations for birders and nature visitors across the mid-Atlantic region.
The refuge's most dramatic seasonal event is the late-May horseshoe crab spawning on the Delaware Bay shoreline. Hundreds of thousands of horseshoe crabs emerge from the bay onto the refuge's bay-side beaches over two to three weeks in May, depositing billions of eggs that attract one of the most concentrated migratory shorebird gatherings in the western hemisphere. Federally threatened red knots, dunlin, ruddy turnstones, and semipalmated sandpipers stop at the refuge to refuel after long flights from South American wintering grounds, making this event a globally significant wildlife spectacle and drawing birders from across North America.
In fall (October-November), large concentrations of snow geese, Canada geese, tundra swans, and dabbling ducks use the refuge's impoundments and bay marshes during southward migration. The refuge trail network includes the 2.5-mile Dike Trail through the heart of the freshwater wetland complex and the shorter Songbird Trail through woodland habitat. Multiple observation platforms provide elevated views over the main impoundments. The visitor contact station near the Turkle Pond Road entrance provides maps and current wildlife information. Freshwater fishing is permitted in designated areas. The refuge is approximately 15 miles east of Milton via Route 16 and is accessible by private vehicle only; no public transit reaches the site.
Good to know
- Hours
- Daily sunrise-sunset; visitor contact station Mon-Fri 8 AM-3:30 PM
- Best time
- May for horseshoe crab and shorebird spectacle; October for snow geese migration
Location
11978 Turkle Pond Rd, Milton, DE 19968
38.8494, -75.2891 View on map
Highlights
- May horseshoe crab spawning on Delaware Bay beaches attracting millions of migratory shorebirds
- Critical Atlantic Flyway stopover for federally threatened red knots and other long-distance shorebirds
- Fall snow goose, tundra swan, and waterfowl concentrations on managed freshwater impoundments
- Dike Trail and Songbird Trail walking access through wetlands and woodland habitat edges
- Free admission refuge with year-round wildlife viewing from trails and observation platforms
Tips for visiting
- Plan a May visit around high-tide events at dusk or dawn — highest horseshoe crab and shorebird concentrations occur at these times
- Bring binoculars and a spotting scope; distances across the impoundments to waterfowl can be considerable
- The refuge has no public transit access — a private vehicle is required for all visits
- Check the U.S. Fish and Wildlife Service refuge conditions page before visiting for current trail access and wildlife activity
- Combine with a Cape Henlopen State Park or Bombay Hook visit for a Delaware coastal birding circuit
When to visit
Late May for the horseshoe crab and shorebird migration event — one of the world's great wildlife spectacles. October and November for fall waterfowl migration. Morning visits during peak migration offer the most active wildlife conditions.
Accessibility
The visitor contact station is accessible for wheelchairs and has accessible restrooms. The Dike Trail and Songbird Trail are natural-surface paths that may be uneven and are generally not wheelchair-accessible. The refuge road provides vehicle-accessible viewing of major wetland areas without leaving the car. Wildlife observation platforms are accessible via ramps at most sites.
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Frequently asked questions
When is the best time to visit Prime Hook National Wildlife Refuge?
Late May for the horseshoe crab spawning and shorebird migration — one of the most significant wildlife gatherings on the eastern seaboard. October-November for snow goose and waterfowl migration. Both seasons offer peak wildlife activity.
Is there an admission fee for Prime Hook?
No. Prime Hook National Wildlife Refuge is free to enter and open to the public daily from sunrise to sunset.
What is the horseshoe crab spawning event at Prime Hook?
Each May, hundreds of thousands of horseshoe crabs emerge from Delaware Bay to deposit eggs on bay beaches. The eggs attract millions of migratory shorebirds in one of the world's most concentrated wildlife spectacles. Prime Hook's bay shoreline is one of the primary viewing locations for this event.