Lynches River, named for Thomas Lynch, Jr., signer of the Declaration of Independence, rises in North Carolina near Waxhaw, North Carolina, at about 700 feet (210 m) elevation, flowing only a short distance to the South Carolina border, and thence to join the Great Pee Dee River near Johnsonville. It is about 140 mi (230 km) long and the drainage area is 1,030 square miles (2,700 km2).

The Pee Dee River, also known as the Great Pee Dee River, is a river in the Carolinas of the United States. It originates in the Appalachian Mountains in North Carolina, where its upper course, above the mouth of the Uwharrie River, is known as the Yadkin River. The river empties into Winyah Bay, and then into the Atlantic Ocean near Georgetown.