Old River is a tributary of the Waccamaw River system in Horry County, South Carolina, flowing through the historic Conway area. As part of the broader Waccamaw River watershed, this waterway shares many characteristics with its parent river, including blackwater conditions, tidal influences in certain sections, and habitat typical of South Carolina's coastal plain. The river meanders through areas with cypress trees and Spanish moss-draped vegetation, creating a quintessentially southern fishing environment. Like much of the Waccamaw system, Old River provides diverse angling opportunities for both freshwater species and occasionally brackish-water fish depending on tidal influences.