Old River is a tributary of the Mississippi River flowing through Chicot and Washington Counties in Arkansas and Mississippi. This waterway is part of the extensive Mississippi River floodplain system, characterized by oxbow lakes, backwaters, and channels that create diverse fishing habitats. The Arkansas portion, particularly around Chicot County, connects with Lake Chicot, the largest natural oxbow lake in Arkansas, forming an interconnected waterway system rich in aquatic life. The Mississippi portion includes sections within the Old River Wildlife Management Area in Washington County. These waters support both warm-water species common to Delta fisheries and provide year-round angling opportunities in a classic lowland river environment.