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Cross the border at Behobia and continue on the GI-636 road to Errenteria. Take the Pasaia Antxo exit, which joins the AP-8 motorway. At the roundabout, take the second exit, still towards Pasaia Antxo; at the next roundabout, take the third exit towards Pasaia San Pedro. At the next roundabout, take the third exit towards Errenteria Beraun and keep left towards Beraun. At the roundabout, turn left and park at the foot of the buildings.
(S/E) Head south-west to go back via the roundabout you arrived at. Cross the bridge over the motorway. At the roundabout, turn right towards “Fuerte de San Marcos” and ignore the road branching off to the left.
(1) Take the concrete track branching off to the left.
(2) Turn onto the path branching off to the right before reaching the buildings.
(3) At the junction, ignore the path leading down to the right; follow the path heading south-west, which climbs through the trees and winds its way to a T-junction.
(4) Continue left, performing a circular loop around Mount Bizarain, then climb up to the fort via the road on the right.
(5) Leave the fort via a path that branches off to the right of the road heading south and cuts across a bend in the road.
(6) Turn left, heading south, then take the first left onto a tarmac road until you reach a junction with a fire hydrant.
(7) Take the tarmac road to the left and continue along a path to the right which joins a road.
(8) Follow this road to the left, which continues as a path on the right along the edge of the forest, to return to the junction from the outward journey.
(3) Take the same route back as on the way out to return to the car park (S/E).
Visorando Member
Moderate 
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