The Valderaduey is a river in central Spain which flows into the Douro on its right bank. In the year 949, an earthquake altered the course of the river.
The Valderaduey originates on the mountain in Renedo de Valderaduey municipality, Province of León From there, the river flows south, passing through the municipalities of Sahagún, Becilla de Valderaduey, Castroponce, San MartÃÂn de Valderaduey, Cañizo and Villalpando before flowing into the right bank of the Duero in the municipality of Zamora.
The main tributaries of the Valderaduey are the RÃÂo Del Hoyo, RÃÂo Pequeno, RÃÂo Viejo, RÃÂo Bustillo, RÃÂo Navajos, , RÃÂo Salado.