From Hasparren, follow signs for Saint-Palais and Saint-Jean-Pied-de-Port (D22). At Bonloc, leave the road to Saint-Palais on your left and continue straight ahead towards Mendionde, then Hélette (D22) for about 8 km. At the roundabout before Hélette, turn right towards the Baigura leisure centre (D119). Further on, turn left onto a secondary road and park near the intersection (recycling point).
(S/E) From the intersection with the D119, follow the small road opposite that passes through the houses of Etxegoienea. It bends to the left and reaches an intersection. Take the dead-end road on the right and pass the Saint-Vincent Chapel to reach the end of the tarmac road and the dirt track.
(1) Take the left-hand path. After a small stream, it climbs up alongside a hedge. At the ruins between three oak trees, continue straight ahead through the ferns on a well-marked path (ignore the side paths) until you reach the top of the meadow.
(2) Leave the path on your left and continue straight ahead along a fence (small wood). At the upper corner of the wood, keep right along the edge and continue on a grassy path (at the start). It then climbs left up a ridge covered with gorse (view of Erregelu) to cross a path on the left.
(3) Keep right on the shared section. Skirt a first pass and continue on the correct path signposted "Bizkarra", which avoids a bump on the right (view of Ursuia and Mendionde). Below a ridge strewn with boulders, continue right on the grassy path to reach a panoramic pass with tables and an orientation panel.
(4) To the left of the ruined barn, take a path along the hillside. After a short descent, the path branches off to the right and reaches a grassy plateau with a view of the southern cirque of the Baigura massif, which suddenly becomes more mountainous.
(5) Climb the straight, rocky path on the right, which gradually approaches the eastern ridge of Pic Erregelu. When the path reaches the Kurutze ridge (772 m), follow it easily to the left until you reach the summit. Only the last section is a little steeper.
(6) From the windbreak of Erregelu (860 m), descend near a building and walk along a grassy ridge. Climb up this ridge (cromlechs), leave the Baigura road below and pass the orientation tables (new cromlechs). Afterwards, pass to the right of the fenced transmitters, then follow the road and path to the last antennas. Climb to the right, then to the left for the few metres separating you from the summit of Baigura.
(7) The descent is via the same route. From Baigura (897 m), return along the ridge to the orientation table, then continue towards the summit of Erregelu, which you can avoid climbing by taking a path on the right that crosses at its foot. Then rejoin the long, fairly flat Kurutze ridge ( visible as far as Soule), then turn right onto the path leading uphill to return to the starting point via the same route you took on the way up (S/E).