This gaping wound in the earth's fabric is 500m deep in parts. A trail up the canyon from Puente de San Úrbez bridge, beside the HU631, leads in about 2½ hours (450m ascent) to La Ripareta, where the Barranco de la Pardina joins the Río Bellós, and in a further two hours (300m more ascent) to another confluence below the powerful Fuen Blanca waterfall.

The GR11 long-distance path passes Fuen Blanca at the foot of its descent from the Refugio de Góriz – then climbs 800m north up to the Collado de Añisclo pass at the head of the Bellós valley, en route to the Valle de Pineta.