Departure from the car park marked at the crossroads leading to the place called Gaxitenea. Before that, when leaving the D918, you will have driven through Haranea and Panparrina. Park your car carefully so as not to obstruct the tractors.
(S/E) Take the tarmac road heading south. After 200 metres, take the farm track that branches off to your right, climbing up through the ferns. Follow this wide but poorly marked path up to a sharp left turn, then another to the right. After this second turn, continue straight up for about 100 metres towards Mondarrain, where you will come across a path coming from the right.
(1) Follow the well-marked path on the left, under the trees. A few old red paint marks on the stones on the ground are misleading, but keep going around and under Mondarrain.
(2) At the fork to the east of the summit, go right to the south of Mondarrain.
(3) Turn north to climb Mondarrin, via a clearly visible passage between the rocks. A few steps over the last rocks before reaching the summit of Mondarrain (large picnic area). Retrace your steps.
(3) Follow the path south, marked with 60 cm high wooden posts painted yellow, until you come to a spring on your right surrounded by barbed wire to prevent horses from trampling it.
Another 400 metres and you will arrive below Pic d'Ourrezti, where the hawthorns become denser.
(4) Descend westwards between the scattered rocks to the 580-metre contour line. You will then come to a well-marked path running north-south, which you take on your left towards the south. Join the ridge at 584 metres.
(5) Take the path on the left up to Pic d'Ourrezti and reach the base of Pic de Mondarrain
(3) Turn onto the return path heading north-east
(2) Continue north and, taking the same path as on the way up, return to the car park where you started (S/E).