The Broad River is a principal tributary of the Congaree River, about 150 miles (240 km) long, in western North Carolina and northern South Carolina in the United States. Via the Congaree, it is part of the watershed of the Santee River, which flows to the Atlantic Ocean. It is called the Rocky Broad River in the Hickorynut Gorge in North Carolina near the communities of Bat Cave and Chimney Rock.