High difficulty enduro traverse from Collada de la Muria to Peñablanca that runs along the Alto del Viso ridge; a spec- tacular ridge that gives us the unusual luxury of riding with a beech forest to our north and a holm oak forest to our south. Some very exposed technical passages make this route inadvisable in icy or snowy conditions. Once in the area around Peñablanca we can head back towards the upper sector of La Pola de Gordón or continue towards the lower sector following the final sections of T3 (blue) or fol- lowing T8 (red).