Trail "A story of water"

In the middle of the 20th century, thousands of workmen dug the bed of a giant underground river. Meltwater from 35 glaciers is channelled along this, via a main collector, to the Grande Dixence dam.

The digging of the Bertol tunnels to supply water from Ferpècle and Arolla to the main collector occupies a special place in the mythology of major building projects. This trail is dedicated to that site and to the workmen who built it.

Its course is marked out by photographs and explanations of the work carried out between 1951 and 1963. The remains that you will see bear witness to this fantastic epic.

The brochure is available at the dam information centre - PDF version (FR)

Length: 4.19 kilometres
Travel time: approx. 2½ hrs. (for the outward journey)
Vertical rise: 420 metres
Difficulty: medium