The Biswon River is a large river on the Greater Continent that flows from the Biswon Watershed into the Brutish Sea passing through the Lowland Hills and Lowland Plains regions along the way. In later ages it became the barrier between the Lowland Plains and the Plains of Blood and Salt. The river is a major trade route on the northern-side of the High Mountains; however, past the delta system, every major settlement is located on the southern-shore of the river. There are no bridges further upstream than the delta.
The Biswon River Delta forms a major part of Sun's Beacon.