Dão River

This article does not cite any sources. Please help by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources:  –  ·  ·  · scholar · JSTOR (January 2009) (Learn how and when to remove this template message)

Dão river
Native name	Rio Dão
Physical characteristics
Source	Eirado
• location	Aguiar da Beira
• coordinates	40°47'09.4"N 7°29'52.2"W
• elevation	750 m
Mouth	Mondego River
• location	, Santa Comba Dão
• coordinates	40°20'27.4"N 8°10'51.2"W
• elevation	110 - 124,7 m
Basin size	1377 km2
Basin features
Tributaries
• left	Carapito stream
• right	Coja stream, Sátão River, Criz River

Dão (Portuguese pronunciation: [dɐ̃w̃]) is a Portuguese river that originates in the plateau regions of Trancoso-Aguiar da Beira in the Eirado parish, Aguiar da Beira Municipality, Guarda District, and varies between 714 and 757 metres (2,343 and 2,484 ft) 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, Mangualde, Viseu, Carregal do Sal, Nelas, Tondela, and Santa Comba Dão. It empties into the Mondego River, in the limits of the councils of Santa Comba Dão, Mortágua, and Penacova, after covering about 100 kilometres (62 mi).

Its granite-sloped valley is situated in the "Região Demarcada do Dão", where the Vinho do Dão wines are produced.

Low water level in Dão river

Dão River at Santa Comba Dão

Wikimedia Commons has media related to Rio Dão.