<P> The Chattahoochee River forms the southern half of the Alabama and Georgia border , as well as a portion of the Florida 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 430 miles ( 690 km ) 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 . </P>
<P> The Chattahoochee River forms the southern half of the Alabama and Georgia border , as well as a portion of the Florida 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 430 miles ( 690 km ) 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 . </P>
which river forms the border between georgia and alabama
which river forms the border between georgia and alabama
The Chattahoochee River
The Chattahoochee River