The Rio Una is a river in the state of Bahia, Brazil, flowing through the eastern part of the state before discharging into the Atlantic Ocean between the coastal towns of Canavieiras to the south and Ilhéus to the north. Its character has been shaped by erosion, and historical accounts note it was once a very deep river requiring a canoe to cross in places, though its bed has since lost depth. The river passes through areas like the village of Colonia, which is situated along its banks. For paddlers, the river offers a planning resource through PaddleWays, which provides access points, water conditions, and information on private and public land boundaries to assist in trip preparation. The overall aesthetic and specific paddling routes are not detailed, nor are explicit hazards, seasonal water temperatures, or water quality issues. There is no mention of any restrictions on paddling activity. The river's geographical course connects inland areas to the Atlantic coast, providing a potential route through varied landscapes.