This circular route starts and ends near the Restaurante Laura. The itinerary leaves from the main road of Casares, goes up on a solid trail and reaches the Puerto de las Viñas. From this point, the path goes across the Paraje Natural Sierra Crestellina. The main trail continues along the east edge of Sierra Crestellina and arrives at a mountain refuge. Before reaching this shelter, a round-trip path goes to the mirador de la Cosalba. From this viewpoint, there are excellent views of Casares, the Campo de Gibraltar and the African coast. In the way back to the refuge, the itinerary goes down on a steep trail that reaches the main road. From this point, there is a wooden walkway parallel to the road that returns to the starting point.
This route allows excellent views of Sierra Crestellina and Monte del Duque. At the beginning, the itinerary passes by an 18th century fountain named Fuente de la Arquita. The vegetation along the entire route is Mediterranean forest: gall oaks, holm oaks, pine trees, carob trees, mastic trees, etc. Moreover, this route has an important ornithological interest as this mountain range is the habitat of many bird species, including an important griffon vulture colony.