 Once on the footpath head towards the "Majada de la Terenosa" (the shelter of the same name is also located there).The "Colláu Vallejo" is reached from here, which is where the route veers to the south and from where you can begin to make out the Picu Urriellu.From that point on the route continues in a zig-zag fashion up to the "Vega Urriellu" where the shelter of the same name is found, at an altitude of 1960m.