On the track of an old mining train that descended from the high Cantabrian mountains through meadows and forests to the coastal loading docks.

Basic Facts
	9,14 Km
	Brazomar Neighborhood - Herreros tunnel (border with Bizkaia) passing through Otañes. Castro Urdiales. Cantabria
	Trekkers, cyclists, suitable for people with reduced mobility.
	Note: Suitable for the Santullán - Mioño station section.
	Compacted soil and asphalt
	Old FC (Railway) Castro Alén along the paved track that descends from the Los Corrales neighborhood to the CA 250 road.
	1 viaduct, 1 bridge y 1 tunnel
	43.368519, -3.21549
	43.368519, -3.21549