BZ-3

To reach the sima BZ-3, take the NA-7182 road, which crosses the Urbasa Park from Zudaire towards Olazagutía. At kilometre 30.9 of this road begins an asphalt track (Otsoportillo track), which is followed to kilometre 4.1. You come to a junction with an easily identifiable parking area, since another pit with a protective wall can be seen; if you do not have permission, the vehicle must be left parked here. Continue along the gravel track (Etxarriko Sareetako Bidea), which leads in the direction of the hermitages of SANTA MARINA and San Adrián. You must walk 1.6 km until you find a fork to the left that must be taken (Santa Marinako Pista). You go down and up through some zig-zags until you find some bordas on the right-hand side (Majadas de Iturmendi), a few hundred metres before reaching the hermitage of SANTA MARINA. A further 1.4 kilometres will have been covered to the bordas, where you can park. You walk about 990 metres in a N-NE direction, without entering the wooded area, and stay beside the escarpment overlooking the Sakana valley, where the fallen menhir of Oineta can be seen, UTM ED-50 573.349 - 4.747.400 - 1075. From here the direction changes 54º towards the northeast, you cross the beech wood and come out onto an open area where the pit is located, which lies 410 mts. from the dolmen and 190 mts. DE LA BALSA.