OTZAURTE- TUNEL SAN ADRIAN
From the old port of Alto de Otzaurte - in front of the Otzaurteko Benta restaurant - and continuing along a concrete track for exactly 5 kilometers, without getting lost, you will find a large car park with gravel. The name of this car park is Aldaola. From here to the tunnel the climb will take you 40 minutes.
The great race called Zegama-Aizkorri passes through this tunnel.