Explore hiking trails around Pelayos del Arroyo, Castilla y León. The best hike near Pelayos del Arroyo 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. Pelayos del Arroyo has population 45.0.