A circular cross-country route which, from La Robla, allows us to cover all the sectors of Zona Alfa along a succession of forest tracks, short stretches of asphalt and several trails. From La Robla, this is the best option for visiting the impressive Corta Pastora/Santa Lucía open-cast mine or reaching the trails in the La Pola de Gordón sector and from there returning to La Robla following the course of the River Bernesga. In a counter-clockwise direction it crosses the villages of Alcedo De Alba, Llombera, La Pola de Gordón, Nocedo, Peredilla and Puente De Alba and gives access to the start of T17, T4, T5, T7, T8, A6 and R1.