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The Mining Railway Trail is part of the Sierra de la Demanda Greenway and follows the old railway line that linked the iron mines with Burgos. The history of the old Sierra de la Demanda mining railway is closely linked to the iron exploitation in this area. Built by the English company The Sierra Company Limited, it began operating in 1901 to transport ore to Burgos and from there to the Basque steelworks, although it never became profitable and closed in 1910. Its tracks were dismantled in 1947, leaving the route unused for decades. At the beginning of the 21st century, the route was reborn as a greenway, part of the Natural Trail Network, and since 2004, it has been an ideal path for hikers and cyclists.

hard descent to Altuzarra, very bad.

Romanesque church dating back to the 12th century on the outskirts of Valgañón, a town in the Sierra de la Demanda near Ezcaray. A great stop to get water on the way up to the top of Pradilla.

An interesting tunnel and nice to drive through.

An impressive and beautiful bridge over the valley.

The railway crossed this port through a tunnel. When making the greenway, the original route was not recovered, so the arrival and departure of the port are two very steep slopes. Most panniers make them by pushing the bike.

Mining railway tunnel. There is a light switch before entering but it does not work. It is advisable to bring light because you cannot see the end. It will be about 250m long

very bearable port