BA-13

At km 2.7 on the road from Lekumberri to Uitzi, past the old Plazaola station, a track branches off to the right. It is followed for 1.6 km until another track, marked as PR, begins on the right. This track is followed for approximately half a km and, where it is left, the course of a normally dry stream is followed upstream. After another 500 metres, the slope on the right is seen to begin to have a pronounced drop. The BA-9 is found on this hillside, in its highest part. Past this entrance a very pronounced joint is observed; following it in the direction of climbing the mountain leads to the BA-10. Continuing in the same direction, 20 metres further on, is the entrance of the BA-13.