From the road between Grazalema and Ubrique you can access the sierras along a stone covered track which leads steadily upwards giving views over the junction of the Sierra de Grazalema and Los Alcornocales natural parks. The terrain stretching before you changes from steep limestone cliffs to rolling oak covered hills. This path is linear, taking you through a mosaic of Mediterranean scrub that has adapted to thrive in pockets of poor soil between porous, often vertical rocks. A two to three hour walk here will give you a terrific sample of the bird and plant life of these sierras as well as the fabulous views.