The Riberas de Castronuño is a natural space situated in the Midwestern region of the province of Valladolid, and covers the stretch of the river Duero between the localities of Tordesillas and Castronuño. The latter also contains the Embalse de San José (reservoir).

The Riberas de Castronuño constitutes a classic marsh ecosystem, noted for its importance as a nesting and hibernating zone for many water birds. An interesting riverbank forest, formed mainly of black poplars, willows, white poplars, ash trees and hawthorns, accompanies the river along its course down the sedimentary plain.


Category: Natural Reserve (8,421 ha.)

Municipalities in the province of Valladolid:
  • Castronuño,
  • Pollos,
  • Tordesillas,
  • Torrecilla de la Abadesa

Visitor Centre

Park House of the Riberas de Castronuño and Vega del Duero

In this area, visitors will find all the information they need about this site. They can explore the Vega del Duero area thanks to the camera they can adjust personally. With a little patience, in addition to the typical flora to be found here, they will also have the chance to admire the area’s magnificent wildlife, particularly the birds.

Address: C/ Iglesia s/n. Castronuño. 47520 Valladolid.

Telephone: 983 866 107



Show morePark House of the Riberas de Castronuño and Vega del Duero

Enviromental Areas

Important water birds, especially the colonies of grey heron and night heron.
Landscape of moors and fertile sedimentary plains traversed by the river Duero.
Riverbank forest with poplars, ash trees, alders and willows.