The starting point for this hike is located in Ibardin at the first car park near the caravan park.
To get to this starting point by car, see the Practical Information section below.
(S/E) Drive down the road to the Col d'Ibardin. Turn right, then cross the Venta Gorria car park and take the gate at the back (make sure you close it behind you). Continue along this path. You will come to a concrete road.
(1) Turn right onto it. You will come to a crossroads at the Okalarre restaurant (usually closed).
(2) Go down to the right along the small path, then look for the tree trunks on the left-hand side of the path, placed across the ditch.
(3) Carefully step over these tree trunks, follow the path and, after a fairly steep climb, you will come to the entrance to a tunnel.
(4) For your information, each gallery is about 100 m long and the floor is normally quite clean. Go straight ahead, ignoring the gallery that branches off to the left. Go to the embrasure: you can easily imagine a machine gun nest in this spot. Retrace your steps a little and go left to the other embrasure. Turn back, almost to the entrance, but before you get there, turn right into the other tunnel. Continue to the exit to find yourself on the other side of the mountain.
(5) Descend and, turning left, pass by the Okalarre restaurant again to reach the crossroads you passed on the way up.
(2) Turn right and retrace your steps in the opposite direction. Return to the first fork in the road at the start.
(1) Continue right on the road, passing close to the Elzaurdia venta. Continue slightly uphill to reach border marker no. 17.
(6) Turn left and follow the artillery path and border markers 16 and 15, with the summit of Erentzazu, to reach marker 14.
(7) Continue straight ahead, then begin a fairly steep descent towards the D404, which can be seen below. Turn left onto it and continue to the Col d'Ibardin roundabout. Turn right to return to the ventas car park (S/E).