The Aizkorri is a top of 1,528 meters altitude in the Sierra de Aizkori in the Basque Mountains in Guipúzcoa. Although it is not the highest mountain, it is the most popular and the whole massif bears its name. On the top is also a hermitage of the same name. The summit is extremely popular among Basque hikers and there are several routes that lead to it, including this variant from the river Ubier.
- From the car park (1) on our right starts a path that runs parallel to the river Ubier. After 10-15 minutes at a house (Mikeleten Etxea) and some signposts (2) we turn left.
- After about twenty minutes we go through a tunnel through the rocks (3) and five minutes further at the signposts (4) we keep to the left and follow the white-red marking.
- 25 minutes further at the signposts (5) we keep to the right and follow the white-red mark. A little further on, we again follow the white-red mark and ignore a yellow arrow. About 10 minutes later we arrive at a fork (6) where the white-red marked path goes straight ahead. However, we turn right and now follow the yellow dots.
- Soon we see the white-red marking again and further ahead (7) the path becomes a bit wider and we get some more views. Here we also see various milestones as marking. About 15 minutes later (8) we walk out of the forest and we get wider views.
- We follow this path with many stones for about 25 minutes until we reach a fork, now near the top (9). Here we turn left and walk the last five minutes to the top of the Aizkorri (10).
- From the top we walk back to the fork (9) where we now hold on to the left, downhill.
- This trail is easy to follow and marked with yellow dots. After about an hour we get to a fence (11) that we go through and then descend to the valley where we see the house Mikeleten Etxea again.
- We descend steeply and after about five minutes come out at a fence (12) that we ignore and simply go straight ahead. So we return to the house Mikeleten Etxea where we go straight ahead at the fork (2) and thus walk back to the car park (1).