The Trabancos is a river in Spain which flows between the Zapardiel and the Guareña rivers and is a tributary of the Duero river. The source of the Trabancos is in Moraña, a region in the north of the province of Ávila, near Blascomillán. The Trabancos is at an elevation of approximately 1,100 meters, is approximately 85 kilometers long and, although its river bed is stable, only has a constant water flow during torrential rains.