Euskotren, formally known as Basque Railways, is a public railway company controlled by the Basque Government and officially established in 1982 to operate several 1,000 mm narrow gauge railways inside the autonomous community of the Basque Country, under the terms of the Statute of Autonomy of the Basque Country. Originally operating under the commercial brand ET/FV, it took control of the management and operations of the narrow gauge lines formerly operated by the railway company FEVE. The commercial brand eventually changed to Euskotren, as it remains today. Since 2006, the infrastructure on which the company runs its trains has been owned by Euskal Trenbide Sarea.

The Basque Country, also called the Basque Autonomous Community, is an autonomous community in northern Spain. It includes the Basque provinces of Álava, Biscay, and Gipuzkoa. It also surrounds an enclave called Treviño, which belongs to the neighboring autonomous community of Castile and León.