The Great Dismal Swamp is a forested peat wetland on the Atlantic Coastal Plain of southeastern Virginia and northeastern North Carolina, between Norfolk and Elizabeth City, covering parts of the cities of Chesapeake and Suffolk and the counties of Gates, Pasquotank and Camden. It may once have spread over more than 4,000 km² (1 million acres); logging, ditching and farming have destroyed much of that, with estimates of the loss ranging from about half to as much as 90 percent. The core is protected as the Great Dismal Swamp National Wildlife Refuge, created under the Dismal Swamp Act of 1974 and now about 453 km² (112,000 acres), plus North Carolina's 58 km² (14,432 acres) Dismal Swamp State Park; a 185 km² remnant was named a National Natural Landmark in 1973. At its centre is Lake Drummond, a 13 km² (3,100 acre) natural lake no more than 2 m (6 ft) deep. The wildlife is what defines it: bald cypress and Atlantic white cedar forest, black bears and bobcats, more than 200 bird species and over 70 kinds of reptiles and amphibians, at the northern end of the chain of southern swamps that runs down to the Okefenokee in Georgia and the Everglades.
Lake Drummond: 3,100 acres at the swamp's highest point
Lake Drummond is the place to start, because it is both the swamp's centre and, oddly, its highest point, with nine small ditches carrying water out of it rather than streams feeding in. Its origin is still argued over. A deep peat fire 3,500 to 6,000 years ago is one theory, a meteorite and a tectonic shift are others, and Native American tradition tells of a "fire bird". People were here long before: archaeological evidence points to human use of the swamp for about 13,000 years, and by 1650 Algonquian-speaking coastal peoples lived in it. The first European known to have reached the lake was William Drummond, later governor of North Carolina, in the mid-1660s, and it still carries his name.
Bald cypress, bowfin and gar in Lake Drummond's tea-coloured water
The lake's edges are the swamp's best-known habitat: bald cypress standing out in open water on swollen, buttressed trunks. Acids leaching from the surrounding peat stain the water the colour of strong tea and keep it low in nutrients, so only a few fish do well here, among them crappie, bowfin and longnose gar. The same tannins once made the water valuable: sailing ships filled their casks with it because it stayed fresh longer on trans-Atlantic voyages. Lake Drummond is one of only two natural freshwater lakes in Virginia, the other being Mountain Lake in Giles County. Boats reach it along the Feeder Ditch from a ramp on the refuge's eastern side, and overnight stays are limited to a Corps of Engineers campsite on the Feeder Ditch near the lake.
Atlantic white cedar and the Dismal Swamp Company of 1763
The swamp's most valuable tree was also its most targeted. Atlantic white cedar, a conifer that grows within about 160 km of the coast and mostly below 50 m elevation along much of the East Coast, was cut along with bald cypress, and logging removed natural stands of both. In 1728 William Byrd II, surveying the boundary between the Virginia and North Carolina colonies, crossed the swamp and gave it the name Dismal. In May 1763 George Washington visited, and he and partners founded the Dismal Swamp Company to drain the land for farms; the company found timber more profitable. A ditch of about 8 km on the west side of today's refuge still carries Washington's name.
Maroon settlements and the Dismal Swamp Canal, 1793 to 1973
The 35 km (22 mi) Dismal Swamp Canal, dug largely by hand by enslaved labourers between 1793 and 1805, opened the forest to large-scale harvesting, and a railroad into part of the swamp followed in 1830. Enslaved and escaped people also lived inside it: research led by Dan Sayers of American University since 2002 suggests that thousands of maroons made homes on the swamp's higher "mesic islands" between about 1700 and the 1860s, sometimes paying nearby whites a quota of logs or shingles to be left alone. Harriet Beecher Stowe set her 1856 novel Dred: A Tale of the Great Dismal Swamp among them, and the refuge opened an Underground Railroad Education Pavilion on 24 February 2012. The canal itself outlived the timber boom: the federal government bought it in 1929, and it is now the oldest continually operating artificial canal in the United States, part of the Atlantic Intracoastal Waterway. Logging went on into the 1970s, but in 1973 the Union Camp Corporation of Franklin, Virginia, gave 199 km² (49,100 acres) to The Nature Conservancy, which passed it to the US Fish and Wildlife Service the next year. Atlantic white cedar has declined across its range because of logging, drainage and altered fire, and the refuge is one of the national protected areas where it survives.
Black bears, bobcats and otters on 112,000 refuge acres
The refuge's mammals are what draw most visitors' attention. Black bears live throughout the swamp, alongside bobcats, river otters and weasels, and white-tailed deer, whose numbers the refuge balances with a regulated hunting season on parts of the land. What they have is space: about 453 km² of forested wetland in a corner of Virginia where the cities of Norfolk, Chesapeake and Suffolk lie close to its edges, plus the state park across the line in North Carolina. That park began as a state natural area in 1974 with help from The Nature Conservancy, was redesignated a state park on 28 July 2007 and opened in 2008, the first time the public could get into the swamp on the North Carolina side. Its offices are about 5 km south of the state line on US Route 17 near South Mills, beside the canal.
Much of the bears' habitat is managed rather than wild in the old sense. Centuries of ditches drained the peat and changed which trees grew where. The refuge now uses water-control structures in those ditches to hold water back in the swamp, and it uses forest management that imitates the effects of wildfire to restore a mix of plant communities. Hunting, water levels and forest structure are all managed with the same aim: keeping the right habitats in place for the species that need them.
213 bird species and the spring warbler peak on Washington Ditch
Birds are the swamp's best-counted animals. Refuge records list 213 species over the year, 96 of which nest there. The swamp sits on the Atlantic Flyway, and the peak arrival of neotropical migrant songbirds, especially warblers, comes from late April to mid-May; April to June are the prime birding months. The refuge straddles two states and, in the refuge's own description, two ecoregions, which is one reason it supports so wide a range of plants and animals.
The prothonotary warbler is the emblem of that season. Once called the golden swamp warbler, it breeds in hardwood swamps across the eastern United States and winters as far south as northern South America, mainly in mangroves, and its bright yellow head stands out against the dark water of the ditches. The easiest place to look is the Dismal Town Boardwalk Trail on Washington Ditch Road, a wheelchair-accessible loop of about 1.2 km (0.75 mi) through the swamp forest, or the 13.7 km (8.5 mi) Dismal Swamp Canal Trail, a former stretch of US Route 17 along the swamp's eastern edge in Chesapeake.
The Dismal Swamp shrew and more than 70 reptiles and amphibians
The swamp's smallest mammal carries its name. The Dismal Swamp southeastern shrew, Sorex longirostris fisheri, is a subspecies of the southeastern shrew found in southeastern Virginia and eastern North Carolina, including the Great Dismal Swamp itself. A shrew this small is rarely seen, but the subspecies name ties it to this one corner of the coastal plain, and the refuge's protected peat forest is one of the places it lives.
Cold-blooded animals are the larger group. The refuge counts more than 70 species of reptiles and amphibians, living in the ditches, the flooded forest and the drier islands. One reptile is mostly missing: the American alligator once lived here, but today only occasional wanderers arrive from North Carolina to the south. For how wetlands like this one fit together with the estuary to the north, see our guide to the Chesapeake Bay wetlands.
334 plants in the 1973–1976 survey, and an orchid found in 2022
The plant life was catalogued soon after the land was handed over. A survey carried out from 1973 to 1976 recorded about 334 plant species from 100 families. The main trees on the refuge are bald cypress, black gum, maple, Atlantic white cedar and pine, and the refuge's management aims to restore the variety of these forest types that logging and drainage reduced.
Surveys still turn up surprises. In 2022 a population of Habenaria repens, the water-spider bog orchid, a floating orchid found from the US Southeast to Argentina, was located on the refuge. It was the first verified record of the species in Virginia, an isolated population north of the rest of its US range, which otherwise reaches only to the Carolinas. Separately, the National Park Service has, since August 2023, been studying whether the swamp and the surrounding cities and counties in both states should become a National Heritage Area. For the wider landscape of the coastal plain around it, from the James River to the Albemarle Sound, read our guide to Tidewater Virginia.