We get up intending to climb the mountain, and we leave town from the train station. Facing the facade of the station building, we take the road to our right, looking for the GI-3771 road or Ipeñarrieta Street. We follow this street to the end of town. We pass under the bridge that crosses over the railroad tracks. We continue walking parallel to the railway, which is on our left.
We pass a bridge over the River Urola and we continue along the railway tracks. At 1.5 km the asphalt road ends and we turn right, at right angles, to reach the GI-2630 road. When we get there, we turn left to enter the town of Legazpi. We continue to follow the same street, lined with factories and further on with houses that have gardens. We come to a fork where we go right, down Nagusia Street toward Legazpi parish church.
We head down Aizkorri Street and leave the village. The football field and sports facilities are on our right. We come to a roundabout that we go straight over and we takethe paved road that runs parallel to the tracks, which continue on our left. Our road runs between the river and railroad tracks. We pass factories and homes, going straight ahead, without crossing the river by means of the bridges that we pass.
We arrive at a sports area with a court on which the Spanish game of pelota is played. It is an unusual “Fronton” because it has walls made of iron rather than concrete. We are at Mirandaola Park, where in 1580, those working in the foundry experienced a miracle: the iron they were smelting transformed itself into a cross. This miraculous event is still celebrated every May 3 in this same place. A signpost indicates the way to Telleriarte, to our left. The trail leads to the GI-2630 road which we don’t take but, instead, we follow the paved road that begins to our left and leads us into the small town of Telleriarte.
We follow the paved road straight ahead that runs parallel to the railroad tracks and leads to Brinkola. Passing under the bridge leading to the train station, we continue straight ahead and go through the town along the same street, before going onto the GI-3511 road. A GR-120 signpost indicates the ascent to the Barrendiola Dam (Barrendiola – Aizkorri).
Once we reach the dam, we cross it. On the other side a dirt road starts that runs along the reservoir and we follow it. The road is marked by red and white GR-120 signs. We reach a fork and we take the path to the right, which brings us very close to the trees, almost hiding itself among them. We continue to follow the GR-120 signs. We arrive at a barn which houses sheep and pass with it on our right. We continue our ascent, following the signs that lead us zigzag fashion up the slope. We have already passed the trees and in winter, snow will undoubtedly cover the area.
We arrive at the port of Biozkornia and Arriurdin Mountain (1,273 m) greets us. We thank the mountain for the good climb it has provided for us. A signpost indicates the direction of Arantzazu. We continue to follow the signs which in the winter snow can be somewhat difficult to find. The road is blurred, as is usual in the mountains. Once we have passed the port, we take a little break and begin our descent towards the sanctuary. We come to a cylindrical mountain lodge.
We allow ourselves to get carried away by the descent. If we follow the dirt road on leaving the shelter, we will arrive at Arantzazu. In any event, if we go a little faster and avoid making a rather long detour, on reaching a bend of 90 degrees to our right, we go straight ahead and take the path (GR signs) that heads towards a wooded area with a few houses on the other side of it. On our arrival at the houses, we turn right to approach other houses about 150 m away and, once there, we take the roads that head towards our left. We descend towards Arantzazu, which by now is just 1 km away. We always follow the GR-120 signs.