These trails are known as the Vías Verdes where tourists have over 7,000km of those lines, once used by trains, to cover, be it on foot or cycling. Many of the other tracks were never actually made operational as work on them was not completed.

The fact that many railway lines are not in use, leaves Castilla y León with a lot of possibilities for taking advantage of the land which has a great historical and cultural value. The creation of new social demands for hiking and ecological tours has given a new purpose to the once operational railway tracks.