Explore hiking trails around Castellar de la Frontera, Andalucía. The best hike near Castellar de la Frontera is SL-A 138 / SL-A 139 via Sendero del Río Guadiaro, a 12.7 mile oneway in Parque natural de la Sierra de Grazalema. Castellar de la Frontera has population 2990.0.