The Iron Mountains Greenway is an old 28 km train route running nearly parallel to the Barbadun river, connecting Traslaviña and Gallarta.

Now a trail for cycling and walking, the route passes over gentle hills and through wide curves providing a level of comfort and ease throughout.

Over the course of the route, in this incredible landscape, you can visit a large number of old mining operations that will take you back to a time when in addition to transporting iron ore to the port and steel mills in Bilbao, its rails handled the regular flow of passenger trains.