Dão () is a

Portuguese Portuguese may refer to: * anything of, from, or related to the country and nation of Portugal ** Portuguese cuisine, traditional foods ** Portuguese language, a Romance language *** Portuguese dialects, variants of the Portuguese language ** Portu ...

river that originates in the plateau regions of Trancoso-Aguiar da Beira in the

Eirado Eirado is a freguesia in Aguiar da Beira Municipality, Guarda District The district of Guarda ( pt, Distrito de Guarda ) is located in the Centro Region of Portugal, except Vila Nova de Foz Côa, which is in the Norte Region. The district cap ...

parish, Aguiar da Beira Municipality,

Guarda District The district of Guarda ( pt, Distrito de Guarda ) is located in the Centro Region of Portugal, except Vila Nova de Foz Côa, which is in the Norte Region. The district capital and most populous city is Guarda. Municipalities The district conta ...

, and varies between in elevation. It flows in a general northeast–southwest direction, passing through Barragem de Fagilde and crosses or demarcates the limits of the councils of Aguiar da Beira,

Penalva do Castelo Penalva do Castelo () is a municipality in the district Viseu in Portugal. The population in 2011 was 7,956, in an area of 134.34 km2. The present mayor is Francisco Lopes de Carvalho, elected by the Socialist Party. The municipal holiday is ...

Mangualde Mangualde () is a municipality in the subregion of Dão-Lafões (historical Beira Interior), central region of Portugal. The population in 2011 was 19,880, in an area of 219.26 km2. History The region of Mangualde has been a crossroads of ma ...

Viseu Viseu () is a city and municipality in the Centro Region of Portugal and the capital of the district of the same name, with a population of 100,000 inhabitants, and center of the Viseu Dão Lafões intermunipical community, with 267,633 inhabita ...

Carregal do Sal Carregal do Sal () is a municipality in Viseu District in Portugal. The population in 2011 was 9,835, in an area of 116.89 km2. The present mayor is Atílio dos Santos Nunes, elected by the Social Democratic Party. The municipal holiday is th ...

Nelas Nelas () is a municipality located in the Centro Region of continental Portugal. The population in 2011 was 14,037, in an area of 125.71 km². History Settlement of the territory of Nelas dates back to the settlement by Neolithic and Stone a ...

Tondela Tondela () is a municipality in the central Portuguese subregion of Dão-Lafões. The population in 2011 was 28,946, in an area of 371.22 km². History Local writer and intellectual Amadeu Ferraz de Carvalho (1876–1951) wrote of the munic ...

, and

Santa Comba Dão Santa Comba Dão () is a city and a municipality in the Viseu District in Portugal. The population in 2011 was 11,597, in an area of 111.95 km2. The city proper has a population of 3,300. The present mayor is Leonel Gouveia, elected in 2013 ...

. It empties into the

Mondego River The Rio Mondego () or Mondego River is the longest river entirely within Portuguese territory. It has its source in Serra da Estrela, the highest mountain range in mainland Portugal (i.e. excluding the Portuguese islands). It runs from the Go ...

, in the limits of the councils of Santa Comba Dão, Mortágua, and Penacova, after covering about . Its granite-sloped valley is situated in the " Região Demarcada do Dão", where the Vinho do Dão wines are produced. River_Dão_near_Santa_Comba_Dão

References

Rivers of Portugal {{portugal-river-stub