We head off down from the Ibones de Bachimaña (2197 m) and cross the dam at Ibón Baxo to join a path on the other side. We follow the path upwards and then border round the lake and afterwards, following a north-westerly direction, border round Bachimaña Alto lake. A small descent leads to a flat area where the path peters out. Holding the same direction we have to cross the stream and head towards a visible signpost on the left bank (crossing with routes 11, 17, and 34). The path becomes apparent once again parallel to the stream we have just crossed and leads us upwards to Ibón Azul Baxo (2360 m). We border round the lake and arrive at Ibón Azul Alto a little later (2406 m). The route then heads off to the west upwards to cross the long scree leading to Collado del Infierno (2722 m) (crossing with route 11).

From the refuge to here the route follows the markings of the GR 11 long distance footpath, which is marked throughout. At the pass we leave the markings that head off towards Cuello de Llena Cantal and tackle the ridge descending from Picos de l'Infierno to the south of the pass. We do not need to tackle the ridge directly, but instead we should take the route on the west side of ridge. The stony ground makes the path difficult to see, but many cairns mark the route. A small gap visible from the pass can serve as a reference point. After this pass we continue along the Marmolera junction of white rock with red schist over some loose ground that is fairly easy going, before reaching a chimney leading to the first of the three summits: Infierno Occidental (3075 m). An exposed, although easy, ridge leads to Infierno Central summit (3083 m). And finally, over less exposed ground we follow the ridge down to the middle summit (3055 m) that separates the highest of the three peaks from the nearby Infierno Oriental (3079 m).

The way back down is on the same route.