The Altamaha River orginates at the confluence of the Ocmulgee River and Oconee River, at the three way county boundary between Montgomery, Jeff Davis, and Wheeler Counties. The Altamaha then flows eastward, and a little southward, for 137 miles to empty into the Atlantic Ocean near Darien, Georgia. Its largest tributary is the Ohoopee River, which joins the Altamaha on the southern border of Tattnall County. The Altamaha River watershed forms the largest freshwater river system east of the Mississippi River. The Altamaha River is Georgia’s largest (though not longest) river.
Altamaha River Partnership Altamaha River Odyssey Altamaha Riverkeeper Altamaha River (New Georgia Encyclopedia) Altamaha River (Georgia River Network) Altamaha River LMER (Land Margin Ecosystem Research) Project (University of Georgia) Altamaha River Bioreserve (SherpaGuide)