Euskal Trenbide Sarea (Basque for 'Basque Railway Network', Spanish: Red Ferroviaria Vasca), commonly known by its acronym ETS, is a railway infrastructure manager operating in the Basque Country, Spain.

The company was formed in 2004, but the railway infrastructure it operates was transferred from Euskotren in 2006.

[4] The company owns the network in which Euskotren operates (including the Irauregi–Lutxana and Ariz–Basurto freight lines[5]), as well as the infrastructure of the Bilbao and Vitoria-Gasteiz tram systems.

[6] It also shares the ownership of lines 1 and 2 of the Bilbao metro with the Biscay Transport Consortium [es].

[citation needed] The company is also building the Gipuzkoan branch of the Basque Y high-speed line under an agreement with ADIF.