Esla
River in Spain
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The Esla is a river in the provinces of León and Zamora in the northwest of Spain. It is a tributary of the Duero River that starts in the Cantabrian Mountains and is 275 kilometres long. Its direction of flow is from north to south. Wikipedia
Source: Valle de Valdosín
Mouth: Douro River
Discharge: 4,767 ft³/s
Length: 171 mi
Bridges: Puente de Mercadillo
Basin size: 16,081 square kilometres (6,209 sq mi)