Route No. 2 of the National Park, with IMBA signage. At the beginning take Gallegos trail, which goes through Los Llanos housing states, and follow the Almajanes trail, crossing oak groves with beautiful panoramic over Lozoya Valley and Montes Carpetanos, before descending to San Mamés town and its beautiful hermitage. Returns to Villavieja along the ancient trail of Buitrago del Lozoya and Boyal’s Pasture.