The Daugava, also known as the Western Dvina or the Väina River, is a large river rising in the Valdai Hills of Russia that flows through Belarus and Latvia into the Gulf of Riga of the Baltic Sea. The Daugava rises close to the source of the Volga. It is 1,020 km in length, of which 352 km are in Latvia and 325 km in Russia. It is a westward-flowing river, tracing ou…The Daugava, also known as the Western Dvina or the Väina River, is a large river rising in the Valdai Hills of Russia that flows through Belarus and Latvia into the Gulf of Riga of the Baltic Sea. The Daugava rises close to the source of the Volga. It is 1,020 km in length, of which 352 km are in Latvia and 325 km in Russia. It is a westward-flowing river, tracing out a great south-bending curve as it passes through northern Belarus.