UITZI TUNNEL

UITZI TUNNEL

An iconic tunnel for hikers and cycle tourists, offering mountainous landscapes, striking natural formations and a watershed, making it ideal for active tour...
One of the great landmarks of the Plazaola Nature Trail and Greenway. At approximately 2,700 metres, it is the longest tunnel on any greenway in Europe and a unique experience for walkers and cyclists. Although lit, it is advisable to bring a torch and warm clothing due to the temperature inside. This tunnel, restored and paved in 2026 thanks to Larraun Town Council, forms part of the route linking Lekunberri with Andoain through beautiful natural scenery of forests and mountains. In the central section, water filtered over time has deposited sediments forming natural formations of remarkable visual appeal. The tunnel also crosses the watershed between the Cantabrian and Mediterranean basins, adding geographical significance to its scenic and heritage interest. The Uitzi Tunnel is an essential stop for those wishing to combine nature, railway heritage and outdoor activity on an accessible, well-signposted route between the Larraun and Leitzaran valleys.