Explore hiking trails around Castillejo de Mesleón, Castilla y León. The best hike near Castillejo de Mesleón is Collado de Cerromalejo Loop via Pista forestal de la Calle Alta, a 6.0 mile loop in Parque Natural de la Sierra de Guadarrama Norte. Castillejo de Mesleón has population 117.0.