Driving through Vielha Tunnel in Spain's Pyrenees

Tunel de Vielha is a high mountain tunnel at an elevation of 1,635m (5,364ft) above sea level, located in Catalonia's north-western corner, in Spain,

Tunel de Vielha

Where is Vielha Tunnel?

The tunnel is located in the Province of Lleida, in the northeastern part of the country.

When was Vielha Tunnel built?

Prior to the 20th century, Spain's Aran valley was largely isolated, especially during winter when snow often blocked the main access road for extended periods. In 1948, the Alfonso XIII Tunnel was inaugurated, claiming the title of the world's longest road tunnel at 5.24km. However, by 2000, its lack of safety features earned it the dubious distinction of Europe's most perilous tunnel. This prompted the opening of the Juan Carlos I Tunnel in 2007. As of 2011, the original Alfonso XIII Tunnel serves as an emergency route, mainly for trucks transporting hazardous materials.

How long is Vielha Tunnel?

Set high in the Pyrenees mountain range, this tunnel connects Vielha, the Aran valley's capital, to the Alta Ribagorça comarca. Part of the N230 road, the road is fully paved. Stretching 5.2km (3.25 miles), the tunnel has two southbound lanes and a single northbound lane, with gradients reaching up to 7.5%.

How to get to Vielha Tunnel?

While accessible year-round, the tunnel might close briefly during severe winter conditions. Two main routes lead to the tunnel's summit. From Vielha, it's a 12.3 km climb with an elevation gain of 664 meters, averaging a 5.4% gradient. Starting from Villaler, the ascent spans 18.7 km with an elevation rise of 656 meters and an average gradient of 3.5%.