The Saint Marys River is a remarkable 130-mile black water stream that originates in the Okefenokee Swamp and serves as the border between Florida and Georgia. This remote waterway meanders through various landscapes before emptying into the Atlantic Ocean at Cumberland Sound, between St. Marys, Georgia and Amelia Island, Florida. With little development and few river crossings, the Saint Marys offers anglers a true wilderness experience. The river transitions from fresh, tannin-rich water in its upper and middle reaches to a rich estuary of tidal waters as it approaches the ocean, with tidal fluctuations occurring up to 50 miles upriver.