The Zêzere (ˈzezɨɾɨ) is a river

River

A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...

 in Portugal

Portugal

Portugal , officially the Portuguese Republic is a country situated in southwestern Europe on the Iberian Peninsula. Portugal is the westernmost country of Europe, and is bordered by the Atlantic Ocean to the West and South and by Spain to the North and East. The Atlantic archipelagos of the...

, tributary to the Tagus

Tagus

The Tagus is the longest river on the Iberian Peninsula. It is long, in Spain, along the border between Portugal and Spain and in Portugal, where it empties into the Atlantic Ocean at Lisbon. It drains an area of . The Tagus is highly utilized for most of its course...

. It rises in the Serra da Estrela, near the Torre

Torre (Serra da Estrela)

Torre is a monument that marks the highest point of Mainland Portugal, and the second most elevated of the Portuguese Republic . This point is not a distinctive mountain summit, but rather the highest point in a mountain range...

, the highest point of continental Portugal. The Zêzere runs through the town Manteigas

Manteigas

Manteigas is a town and a municipality in Portugal with a total area of 125.0 km² and a total population of 4,002 inhabitants.The municipality is composed of 4 parishes, and is located in Guarda District; in Centro Region and Beira Interior Norte Subregion, Comunidade urbana: Beiras...

, passes south of the city Covilhã

Covilhã

Covilhã is a city in Covilha Municipality in Centro region, Portugal. The city proper has 36,723 inhabitants, and the municipality has an area of 555.6 km² with a total population of 53,501, being composed of 31 parishes. It is located in the Cova da Beira subregion, in the district of...

 and east of the town of Pedrogão Grande. It flows into the Tagus in Constância

Constância

Constância is a municipality in Portugal with a total area of 80.4 km² and a total population of 3796 inhabitants.The municipality is composed of 3 parishes, and is located in Santarém District....

. It is the second longest river exclusively Portuguese (the Mondego is the longest). Its slope allows for the hydroelectric powerplants of Bouçã, Cabril and Castelo de Bode

Castelo de Bode Dam

Castelo de Bode Dam is a concrete arch-gravity dam on the Zêzere River, a tributary of the Tagus River, located southwest of Tomar and north of Constância, in Portugal. It is one of the tallest structures in Portugal....

, the last one having a large reservoir.