Location on the network+ Santa Comba Dão × Viseu (🔎)
The Dão line () was a metre gauge railway line in Portugal. It ran close to the Dão River (Rio Dão), between Santa Comba Dão and Viseu Their distance is 39.6 Km. It is now a greenway for cyclists and pedestrians under the name Ecopista do Dão.
The line opened in 1890; it was closed to freight in 1972 and to passengers on 25 September 1988. The tracks have since been lifted and largely replaced by a rail trail.
See also List of railway lines in Portugal List of Portuguese locomotives and railcars History of rail transport in Portugal
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