Explore hiking trails around San Martín de Valdeiglesias, Comunidad de Madrid. The best hike near San Martín de Valdeiglesias 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 Valdeiglesias has population 9120.0.