The cycling ring of the Sierra Norte de Madrid, with Carpetania signaling, runs the Horizontal trail through the Montes Carpetanos. With more than 20 km of route on a height of 1800 m, it offers panoramic views of Lozoya Valley and Somosierra mountain pass, ending in Robregordo town. The link signposted from Villavieja del Lozoya, is by Cerro Santuil trail (Route 1 inverse direction).