The Altamaha River empties into the Atlantic Ocean, bringing millions of gallons of freshwater to the coast each day. The combination of river flow and ocean tides mix freshwater from the river with saltwater from the ocean, creating an environment where many diverse organisms reproduce, feed, and grow.

Sediments carried from upland areas of the watershed are deposited near the mouth of the river, building islands and marshes. Barrier islands formed over thousands of years protect the mainland from storms and heavy surf. The beaches, marshes and uplands of the barrier islands are home to many unique and interesting species of plants and animals.

The coast is also an area where many people come to enjoy relaxing vacations and to take advantage of the multitude of recreational activities available there, from fishing to swimming to simply lying on the beach with a good book.