Douro basin

The Douro on its way through Zamora.

The main hydrographic network of Castile and León is constituted by the Douro river and its tributaries. From its source in the Picos de Urbión, in Soria, to its mouth in the Portuguese city of Porto, the Douro covers 897 km. From the north descend the Pisuerga, the Valderaduey and the Esla rivers, its tributaries more plentiful and by the east, with less water in its flows, highlight the Adaja and the Duratón. After passing the town of Zamora, the Douro is confined between the canyons of the Arribes del Duero Natural Park, bordering with Portugal. On the left bank are important tributaries such as Tormes, Huebra, Águeda, Côa and Paiva, all from Sistema Central. On the right they reach the Sabor, the Tua and the Tâmega, born in the Galician Massif. After the Arribes area, the Douro turns west into Portugal until it empties into the Atlantic Ocean.

Other watersheds

Several rivers of the community pour their waters into the Ebro basin, in Palencia, Burgos and Soria (Jalón river), that of Miño-Sil in León and Zamora, that of the Tagus in Ávila and Salamanca (rivers Tiétar and Alberche and Alagón respectively) and Cantabrian basin in the provinces through which the Cantabrian Mountains extends.

Rivers:

Águeda (river)

Alagón (river)

Alberche

Alhama (river)

Arandilla (river)

Bayas (river)

Cadagua

Camesa

Cares

Carrión (river)

Cea (river)

Cega (river)

Cerquilla River

Cidacos

Cofio (river)

Douro

Duerna

Duratón (river)

Ebro

Eresma River

Esgueva

Esla (river)

Francia (river)

Gaznata

Huebra

Najerilla

Navajos (river)

Nela (river)

Oca (river)

Odra (Pisuerga)

Orallo River

Órbigo

Pisuerga

Queiles

River Cúa

Sil (river)

Tiétar (river)

Tirón River

Tormes

Trabancos (river)

Tumbafrailes

Uces

Valdavia River

Valderaduey

Zadorra