Explore hiking trails around San Martín de la Vega, Comunidad de Madrid. The best hike near San Martín de la Vega 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. San Martín de la Vega has population 20664.0.