Euskal Trenbide Sarea (Basque Railway Network) is the Basque Government-owned company that maintains and creates the railway infrastructure in the autonomous region. Euskotren is the Basque Government-owned narrow gauge rail company that operates commuter services in Bilbao and San Sebastián, intercity Bilbao-San Sebastián service, and Euskotren Tranbia tram services in Bilbao and Vitoria-Gasteiz.

Metro Bilbao operates two metro lines that serve the Greater Bilbao area while Euskotren operates a third which opened in 2017. Euskotren operates a metro-like service in the San Sebastián area.

The Spanish government owns two main RENFE broad gauge lines that link Vitoria-Gasteiz with San Sebastián and Bilbao with central Spain. It also operates Cercanías commuter lines in both Bilbao and San Sebastián.

The FEVE narrow gauge rail company operates a commuter line between Bilbao and Balmaseda and links Bilbao with the rest of northern Spain.

A new high-speed network (called Basque Y) currently under construction will link the three capitals in ‘Y’ formation. Because of the rough geography of the territory, most of the network will run through tunnels, with a total estimated cost of up to €10 billion.

The estimated ecological impact of the project has encouraged the formation of a group campaigning against it called AHTrik Ez Elkarlana. The group uses social disobedience to oppose the project and promotes referendums against it in the towns it most affects. In spite of the vocal opposition to the project by this and other community groups (as well as EH Bildu), work continues, not without uncertainty. In early 2015, an estimate suggested that the average Basque intercity fare would rise to a non-competitive 25 €, while the Spanish central government’s funding has been subject to continuous delays, spurring the irritation of the Basque government in Vitoria-Gasteiz.