Jockey’s Ridge is the tallest active sand dune system in the Eastern United States and the most striking of the remaining dunes on the Outer Banks. The winds blow from the northeast during the winter and from the southwest during the summer, so the sand is constantly blown back and forth, preventing it from blowing away entirely. At times, the dune can get as tall as 60 feet. Because the ridge is always changing, it is often referred to as “The Living Dune.”

The dunes are believed to have formed 3,000 to 4,000 years ago. The sand is mostly quartz rock. Geologists believe that strong water currents from hurricanes and storms washed sand from large offshore shoals onto the beach. Over many years, the wind picked up this sand and blew it inland. These evolved into a system of dunes that now stretches along the Outer Banks coastline. The amount of sand making up the 426 acres of Jockey’s Ridge is equal to about 6,000,000 dump truck loads!

The 3 Ecosystems of Jockey’s Ridge

Dunes

The Dunes

The dunes consist of three peaks and are an example of a Medaño, shifting sand that lacks vegetation. No plants or animals make their home on the dune due to the harsh conditions here.

The area around the base of the dunes hosts a variety of grasses and small plants. One such plant is the American Beach Grass which anchors itself in the sand with help from its 40-foot long root system. The grasses create habitats for small animals and insects. Heavy rains sometimes create temporary pools around the base of the dunes, providing wildlife with fresh water.

Maritime Thicket © Bill Birkemeier

The Maritime Thicket

The maritime thicket of live oaks, persimmons, red cedar, wax myrtle, bayberry, sweet gum, red oaks, and pines grows best in areas protected by the large dune. The height of the dune provides protection from both wind and salt blown off the ocean. The effects of the wind and salt stunts the growth of trees, causing them to look like shrubs. Larger animals such as foxes, deer, and raccoon find protection in this environment.

The Roanoke Sound Estuary

The Roanoke Sound Estuary

The Roanoke Sound Estuary is a rich habitat for a variety of plant, animal and bird life. Cattails, sawgrass, giant cordgrass and black needlerush provide habitats for many waterfowl and serve as fish nurseries. The sound is also home to the Blue Crab, an important commercial fisheries industry in North Carolina.