Chattahoochee
The Chattahoochee River (ˌtʃætəˈhuːtʃi) forms the southern half of the Alabama and Georgia border, as well as a portion of the Florida and Georgia border. It is a tributary of the Apalachicola River, a relatively short river formed by the confluence of the Chattahoochee and Flint rivers and emptying from Florida into Apalachicola Bay in the Gulf of Mexico. The Chattahoochee River is about long. The Chattahoochee, Flint, and Apalachicola rivers together make up the Apalachicola–Chattahoochee–Flint River Basin (ACF River Basin). The Chattahoochee makes up the largest part of the ACF's drainage basin. The source of the Chattahoochee River is located in Jacks Gap at the southeastern foot of Jacks Knob, in the very southeastern corner of Union County, in the southern Blue Ridge Mountains, a subrange of the Appalachian Mountains. The headwaters of the river flow south from ridges that form the Tennessee Valley Divide. The Appalachian Trail crosses the river's uppermost headwaters. The Chattahoochee's source and upper course lie within Chattahoochee National Forest. From its source in the Blue Ridge Mountains, the Chattahoochee River flows southwesterly to Atlanta and through its suburbs. It eventually turns due-south to form the southern half of the Georgia/Alabama state line. Flowing through a series of reservoirs and artificial lakes, it flows by Columbus, the third-largest city in Georgia, and the Fort Benning Army base. At Columbus, it crosses the Fall Line of the eastern United States. From Lake Oliver to Fort Benning, the Chattahoochee Riverwalk provides cycling, rollerblading, and walking along of the river's banks. Farther south, it merges with the Flint River and other tributaries at Lake Seminole near Bainbridge, to form the Apalachicola River that flows into the Florida Panhandle. The Chattahoochee River ends in the city of Chattahoochee, FL. From there, the same river is then named Apalachicola River, which ends (160 miles away) in the city of Apalachicola, FL (meaning both rivers end in the city named after them).