The 2nd stage of the Tour du Val d’Hérens leads from the world’s tallest dam along Switzerland’s largest reservoir to the foot of glacier-strewn summits – and over a pass that has become sporting legend.
The second leg of the 5-stage Tour du Val d’Hérens links two side valleys: the Val d’Hérémence and the Val d’Arolla. The first part of the hike is a flattish walk the length of the Lac des Dix. A steep climb leads up to the Col de Riedmatten, which links the two valleys. The final stretch of hike is a steady descent to the village of Arolla.
The hike starts at the crest of the Grande Dixence, the world’s tallest gravity dam. From here it leads along the western shore of the Lac des Dix: Switzerland’s largest artificial reservoir, with a capacity of 400 billion litres of water. The setting is spectacular, with a parade of snow-capped peaks, draped with glaciers, forming a sparkling backdrop beyond the lake.
The trail climbs above one of the glaciers to a pass made famous by the world’s toughest ski mountaineering race. The Patrouille des Glaciers, held every other spring, sees teams of three race from Zermatt across the mountains and glaciers to Verbier, and has won a reputation as the world’s toughest team competition. The steep and narrow climb to the Col de Riedmatten (2,918 m) is one of the contest’s great challenges – although the ascent in summer should not pose problems for experienced mountain hikers.
From here, the trail leads steadily down to Arolla in the neighbouring valley.
Before starting the hike, if time permits, it is worth calling in at the visitor centre at the foot of the dam to learn about the region’s geology and wildlife. The centre also reveals some of the secrets of the pioneering Grande Dixence complex, which unites a vast network of reservoirs, underground tunnels, pumping stations and power plants to form Switzerland’s largest hydro plant.
Before starting the walk, call in at the Grande Dixence visitor centre (free entry) to find out about the dam, reservoir and local wildlife.
Use of the trails and the information on this website is at hikers’ own risk. Local conditions may entail changes to routes. Valais/Wallis Promotion accepts no liability for the accuracy and completeness of information on this website.
For all hikes:
For mountain hikes:
For high-altitude hikes:
For certain walks:
More information about the destination:
A9 motorway, exit 27 (Sion-Est), follow signs for Vex/Hérémence/Grande Dixence.
At Grande Dixence. However, for a day trip, it makes more sense to park lower down the valley – e.g. at Vex – and to travel by postal bus to the start of the walk and back from the finish.