Euskotren Trena, formerly known just as Euskotren is a commuter, inter-city and urban transit train-operating company that operates local and inter-city passenger services in the provinces of Biscay and Gipuzkoa, in the Basque Country, Spain. It is one of the four commercial brands under which Euskotren operates, as a public company managed by the Basque government. The entire 181.1-kilometre (112.5 mi) network uses 1,000 mm (3 ft 3+3⁄8 in) narrow gauge rail tracks which have been owned by the Basque Government since their transferral from the Spanish government; the rail tracks and stations were part of the FEVE network until its transferral. Euskotren Trena also operates the Donostia/San Sebastián metro under the brand Metro Donostialdea.
Euskotren Trena operates the railway services and networks, while Euskotren Tranbia operates the tram networks, Euskotren Autobusa the bus services and Euskotren Kargo the freight rail services. Since 2006 Euskotren Trena has been the commercial brand for the operator of the railway network in the Basque Country, which is Euskotren, while the network itself is owned by the public entity Euskal Trenbide Sarea. In 2012 the commercial brand was changed from simply Euskotren to Euskotren Trena, adding the Basque word trena.
