From the road that winds the west side of the massif, where the Viewpoint Bizkaiko Talaia ( Balcony of Biscay) is located, conveniently track marked with signs marking the route to Oiz ( 1,029 m ) by Donesolo hill ( 550 m) ascend toward the pass Arreseburu ( 798 m ) where the chapel of San Cristobal is contact with the runway and the Oiz is made. Other notable hits from the north side are Ziortza (307 m ) or the port of Gontzegarai (360 m ) . In the latter case, a track leads to the pass and village Kortaguren ( 595 m ) . Going up the mountain directly from this point. On the eastern side the ascent is from the port of Trabakua (405 m ) by Zengotitagana hill (812 m ) to connect with the eastern hillock of Mount Oiz .