(0h0min; 0 kms) Villanueva de Aezkoa (920m). You head to the top of the village, where a path leads north, through fields, towards Sierra de Berrendi. You pass a drinking fountain and join a path, which you follow on the right to the end (drinking fountain), where it gives way to a path that rises forthrightly up through the beech forest.

(1h10min; 3.2 kms) Paso de Ollokiate (1,275m). Close by, to the left, stands the peak of Berrendi (1,351m). The GR11 turns right and continues through woodland, in the proximity of the edge of the mountains. After Portillo de Martxate the path comes out into open terrain where it joins a track leading to...

(3h05min; 9.6 kms) Paso Tapla (1,367m), crossed by a small road that links Ochagavía with Casas de Irati. The route rises up towards Idorrokia (1,492m), leaves it to the left and continues along the top of the Sierra de Abodi, through fields, towards the trig point in...

(3h35min; 11.5 kms) Abodi Occidental or Harrizabala (1,496m). You leave it behind and continue as far as the...

(3h45min; 12.6 kms) Paso de las Alforjas (1,440m). Mountain hut in the vecinity (free, in precarious condition). The GR11 abandons the higher ground and heads down across grassy terrain, via the south side of the mountain. The narrow path follows the edge of the woods until, upon reaching a ridge, veers to the south, and drops directly down in search of a track. Follow it to the east, although it is not long before you leave it, and descend along paths until you join another one going south – uphill – along a ridge which leads you all the way to the Santuario de Muskilda. Before that, you will cross the road coming from Ochagavia down below.

5h10min; 18.9) Santuario de Muskilda (1,020m). This spot is well worth a stop before taking on the steep descent to...

(5h45min; 20.6 kms) Ochagavía (750m).