On this trip you will find an important part of the essence of Castile. The landscape alternates the dryland crops in the valleys of the Arlanza and Duero rivers with the Sabinares, Robledales, Pinares, Monte Raso and Parameras. The route crosses six natural spaces, including the Sabinar del Valle del Arlaza and La Yecla (a cutting limestone at the exit of Silos and on the foot of the road that is worth visiting), and the Soriano Space of the Duero River, of great environmental importance but also geopolitics during the Middle Ages. This importance is reflected in the numerous watchtoves and castles that marry this unique space, between Langa de Duero and Berlanga de Duero, and that has its emblem in the Colossal Fortaleza Califal de Gormaz, of which it was warden El Cid. 8 km of Covarrubias), and you will know mythical places within Cidiana history, such as Vivar del Cid, San Pedro de Cardeña, Castillejo de Robledo or San Esteban de Gormaz among others and, of course, Burgos, Cidiana City par excellence with good infrastructure for cyclots and a monumental heritage of first headed by its cathedral. On the route you will also find numerous Romanesque footprints in the fascinating cloister of Santo Domingo de Silos, in the paintings of the hermitage of San Miguel in Gormaz, in the churches of San Esteban de Gormaz and in many other populations that retain samples of the rural Romanesque, of a great suggestive and evocative power. Special member deserves the Visigothic Hermitage of Quintanilla of the Vine Needed under Lara Castle, in the desolate and powerful places of land of Lara. For the rest, the small and peaceful peoples predominate in this section, some of them of medieval "aroma" and recognized interest, such as Covarrubias, Santo Domingo de Silos, Peñaranda de Duero, Langa de Duero, San Esteban de Gormaz, the Burgo de Osma, Berlanga de Duero and of course, at the end of this path, already in Guadalajara, the Inexpossible Attach Historical and/or artistic. In Santo Domingo de Silos the road route follows an itinerary other than the path, although both routes will bind again after 50 kilometers in Alcubilla de Avellaneda, in Soria. This little journey keeps some surprises; The first is Caleruega, homeland of the founder of the Order of the Dominicans, and that has a Romanesque church and a medieval tower. From Caleruega we go to Peñalba de Castro, in whose term the archaeological sites of the Roman city of Clunia, today visitable, one of the great imperial cities of the ancient Hispania are found. It is an ideal route for road cycling: very varied, without large profiles and in general on secondary roads with scarce and sometimes void traffic. Anyway, do not forget to circulate with caution. Little disasters can be dangerous.