5.0
(2)
58
riders
3
rides
Gravel biking around Lac de Saint-Guérin offers routes through the Beaufortain massif in Savoie, France. This region is characterized by its emerald-blue artificial lake set at 1582 meters, surrounded by alpine pastures and dramatic mountain scenery. The area features significant elevation gains, providing panoramic views of the French Alps and peaks like Roc du Vent. It is also home to the impressive Saint-Guérin dam, part of a larger hydroelectric complex.
Last updated: July 14, 2026
4
riders
14.8km
01:29
590m
590m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
7
riders
25.8km
02:15
1,060m
1,060m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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8
riders
76.8km
06:14
2,390m
2,390m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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A shame that the end of this magnificent pass is not better signposted.
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Nice pleasant place with church, shop and restaurants.
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easy endurance tour, beautiful, highly recommended
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(Non-electric mountain bike with baby carrier) The start is on a paved road, with some steep climbs, up to the restaurant (closed in summer). Then it's a fairly smooth ride before tackling the climb to Mont Clocher. Be careful, it's very steady but requires a significant effort. The descent is gentle; you can finish with the green DH trail for the more adventurous!
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The Roselend Dam is located in the commune of Beaufort-sur-Doron, in the Beaufortain region of Savoie, between the Col du Pré and the Cormet de Roselend, near the Arêches-Beaufort ski resort. The surrounding mountains reach an altitude of around 2,800 meters. It is part of the Roselend La Bâthie hydroelectric complex, which includes the Roselend Dam and two satellite dams: La Gittaz and Saint-Guérin. This complex is managed by EDF's Alpes Production Unit. The Roselend La Bâthie hydroelectric complex produces the equivalent of the domestic energy consumption of 450,000 residents, thus avoiding the emission of 890,000 tons of CO2 per year. The Roselend Dam is a double-curved arch dam with buttresses. Height = 150 meters Crest length = 804 meters Water reservoir [of the hydroelectric complex] = 187 million m3 The Roselend - La Bâthie development is supplied by the Roselend dam itself, as well as by two satellite dams, La Gittaz and Saint-Guérin. The total storage capacity of these three reservoirs, connected by a system of galleries, is 213 million m3. The water collected at Roselend crosses the massif through a 12.5 km long gallery to flow at an altitude of 1,400 m into the Isère Valley, in the Tarentaise region. It is then transported to the underground plant at La Bâthie via a 2,500 m long penstock, with a drop of 1,200 m. The power plant is equipped with six Pelton-type generating units with a total capacity of 550 MW. Since 2013, EDF has been replacing the main components of each generating unit (turbine, generator, transformer, and energy evacuation cables) to achieve a total capacity of 600 MW by the end of 2018. https://youtu.be/G0Ss9v6wxQQ
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Magnificent view from the pass, but impossible on gravel.
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One of the most visited sites in the Alps, on foot or by bike.
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There are 3 dedicated no-traffic gravel bike trails listed in this guide for the Lac de Saint-Guérin area. These routes are specifically curated to offer a serene and car-free cycling experience amidst the stunning alpine scenery.
The no-traffic gravel bike trails around Lac de Saint-Guérin are generally considered difficult. They often feature significant elevation gains and a mix of paved and unpaved surfaces, making them suitable for experienced gravel cyclists looking for a challenge. For example, the Roselend Dam – Vers le col du Pré loop from Arêches involves over 1000 meters of elevation gain.
Absolutely! The region is rich in natural beauty and impressive structures. You'll encounter the stunning emerald-blue waters of Lac de Saint-Guérin itself, and the impressive Saint-Guérin Dam. A highlight for many is the Himalayan footbridge of Lac de Saint-Guérin, offering spectacular aerial views. The trails also provide panoramic vistas of the Beaufortain massif and distant glimpses of the Aravis mountain range.
The best time for gravel biking around Lac de Saint-Guérin is typically from late spring to early autumn (June to September). During these months, the alpine pastures are vibrant, and the weather is generally more stable. Keep in mind that some higher elevation sections, like the Cormet d'Arêches, might still have snow early in the season.
Yes, all the no-traffic gravel bike trails featured in this guide are circular routes, allowing you to start and end at the same point. For instance, you can explore the Fairy Lake – Cormet d'Arêches loop from Barrage de Saint-Guérin or the Arêches Ski Resort – Plan Villard loop from Beaufort.
The routes vary in length and duration. You can expect distances ranging from approximately 14 km to 26 km. In terms of time, these challenging trails typically take between 1.5 to 2.5 hours of active cycling, not including stops for breaks or enjoying the views. For example, the Fairy Lake – Cormet d'Arêches loop is about 14.8 km long.
Yes, parking is generally available near the starting points of these routes. For example, the Fairy Lake – Cormet d'Arêches loop starts from Barrage de Saint-Guérin, where parking facilities are typically present. Similarly, routes starting from Arêches or Beaufort also offer parking options, making access convenient for cyclists.
The area is highly rated by the komoot community, with an average score of 5.0 stars. Reviewers often praise the stunning, wild alpine scenery, the challenging yet rewarding climbs, and the peaceful, car-free environment that allows for an immersive outdoor experience. The panoramic views of the Beaufortain massif are frequently highlighted as a major draw.
Yes, the region is well-suited for e-gravel bikes. While the trails are challenging, using an electrically assisted gravel bike can make the substantial elevation gains and passes, such as the Cormet d'Arêches, more accessible to a wider range of riders, allowing everyone to enjoy the breathtaking alpine landscapes.
The Lac de Saint-Guérin area, being part of the Beaufortain massif, has villages like Arêches and Beaufort nearby. These towns offer various amenities, including cafes, restaurants, and accommodation options. While the trails themselves are often in wilder, more remote areas, you can plan your rides to start or end near these villages for refreshments and lodging.
You can expect a diverse mix of terrain. The trails typically combine sections of paved mountain roads with unpaved gravel paths, forest tracks, and alpine pastures. This variety adds to the challenge and adventure, requiring a gravel bike capable of handling different surfaces and significant climbs.


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