Guidebook to 36 walks in Andalucia. The Sierra Nevada regions of Aracena, Grazalema, Los Alcornocales and the Gaucin, La Axarquia, the Alpujarras and Cazorla each have 6 day walks. Walking routes in the Cordillera Betica mountains range from 5 to 21km and are graded for difficulty, with many suitable for all walkers.