(0h0min; 0kms) Puente de Santa Ana (925m). On the valle de Oza road, take the turning that is signposted to Gabardito and Bisaltico auberge. After crossing the river (Santa Ana bridge) keep on the narrow road for another 5mins then take a path on the left that heads uphill through the woods. This is a straight ascent, offering little respite. You will cross over the road several times on your way up, until you reach...

(0h55min; 2.8kms) Gabardito auberge (1.370m), standing on a great plain with magnificent views towards Lenito peak. Drinking fountain. Once you have left if behind you, the track heads back into the pine and beech forest and becomes a path. Rising up the right-hand side of Agüerri ravine, the path gets closer to the rocks, passing an enormous gendarme pinnacle known as "Puntal de los Porquez". Soon afterwards you ignore a path leading to the bottom of the valley, and zigzag uphill over a rocky step, rising steadily, until the woodland gradually gives way to pastureland.

(1h55min; 5.5kms) Plan de Dios te Salve (1.650m). On your left you will see the Dios Te Salve refuge (in OK condition) and later on, on the way to Plan d’Aniz, a refuge with the same name. The GR11.1 climbs up across fields to the...

(3h10min; 9kms) Cuello de lo Foratón (2.032m). This col lies at the foot of Bisaurín itself (2670m) (for those brave souls in search of a complete day’s walking). The path zigzags down the last descent from the col then follows much gentler terrain. Walking through open countryside, you cross the odd stream and almost at the end, you pass the Fuenfría drinking fountain.

(4h00min; 12,2 kms) Refugio de Lizara (1.540m).