4.8
(19)
109
riders
20
rides
Mountain biking around Grand Réservoir de Vioreau offers diverse terrain, from smooth lakeside paths to more challenging sections through forests. The region is characterized by the expansive reservoir, the largest in Loire-Atlantique, bordered by the Vioreau forest to the north. Riders can experience varied landscapes, including shaded woodlands and open water views, providing a natural playground for outdoor activities. The area features a mix of flat sections and gentle inclines, suitable for different skill levels.
Last updated: July 4, 2026
4.3
(3)
16
riders
27.3km
02:02
170m
170m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
5.0
(1)
5
riders
32.1km
02:18
160m
160m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

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4.3
(7)
25
riders
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
4.5
(2)
14
riders
37.3km
02:46
190m
190m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
4
riders
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
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Very beautiful place. I was able to cycle around the lake but I'm pretty sure many of the paths are impassable in winter.
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The west bridge of Lake Voireau offers a beautiful, unobstructed view of the reservoir. The largest body of water in Loire-Atlantique, this lake stretches through the heart of the forest. Its wooded banks and landscaped beaches make it a pleasant stopover for a nature break or a swim.
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Some arcades are more accessible due to ongoing repair work. A diversion has been put in place.
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Also known as the "basin," the port of Nort-sur-Erdre is a lively, historic neighborhood that's a great place to stop off. At the foot of the Saint-Georges Bridge, which separates the wild Erdre from the navigable Erdre, the marina is now a popular place for walking and fishing. Free Wi-Fi access near the Tourist Office Contact the harbor master's office for an extended stay; the first two nights are free. Open year-round Type of facility: Slipway - River stopover - Pontoon - Marina Payment methods: Bank and postal checks Access location: Nort-sur-Erdre train station: 1 km Languages spoken: French Facilities: Picnic area - Restrooms - Services - Playground
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The Provostière pond, with a surface area of 73 ha, is connected to the Vioreau lake by the Rigole des Ajaux. This complex is part of the supply system of the Nantes-Brest canal. Its hydraulic management is ensured by the Loire-Atlantique Department, which has owned it since 2008. A 5.5 km path on which a bird observatory is located allows you to go around the pond in about 1h30.
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What we'd heard about Brittany was that it's supposed to have lots of forests, a special kind of people, and nature beyond nature. But we weren't expecting such a beautiful little town, and as for the special Bretons – they're just super friendly!
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The Grand Réservoir de Vioreau, located near Joué-sur-Erdre in the Pays de la Loire region, is an impressive body of water covering approximately 900 hectares. Originally built to regulate the flow of the Erdre and ensure the water supply to the surrounding areas, the reservoir now provides a magnificent setting for mountain biking. The surrounding trails offer varied terrain, from smooth lakeside paths to challenging and rugged sections through the nearby forests.
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There are over 20 mountain bike trails available around Grand Réservoir de Vioreau. These routes cater to various skill levels, from easy lakeside paths to more challenging forest sections.
The trails around Grand Réservoir de Vioreau offer a range of difficulties. You'll find 5 easy routes, 15 moderate routes, and 3 difficult routes, ensuring options for beginners and experienced riders alike.
Yes, there are several family-friendly options, particularly the easier routes that follow the lakeside paths. These trails offer smoother terrain and scenic views, suitable for a relaxed ride with children. One such route is Melleray Abbey loop from La Meilleraye-de-Bretagne, which is rated as easy.
You'll experience diverse natural features, including the expansive Grand Réservoir de Vioreau itself, which is the largest freshwater reserve in Loire-Atlantique. Trails also wind through the Vioreau forest, offering shaded rides under oaks and beeches, and provide opportunities for wildlife spotting, especially migratory birds near the ornithological observatory.
Yes, several routes pass by notable landmarks. You can see the historic Vioreau Reservoir Dam, built in 1835, and the West bridge at Lac de Vioreau. Some trails also follow the feeding canal to the Nantes-Brest Canal, such as sections of The Arcades of the Rigole – Grand Réservoir de Vioreau loop from La Meilleraye-de-Bretagne, which incorporates historical canal features.
The area is enjoyable for mountain biking throughout much of the year. Spring and autumn offer pleasant temperatures and vibrant scenery. Summer provides warm weather, with the Vioreau forest offering cool shade. Winter riding is also possible, though some paths might be muddier.
The trails around Grand Réservoir de Vioreau are generally dog-friendly, especially those through the forests and along the lake. However, it's always recommended to keep dogs on a leash, particularly in protected natural areas or near wildlife habitats, and to respect local signage.
Parking is available at various points around the Grand Réservoir de Vioreau, particularly near the 'Vioreau Pleine Nature' leisure base and other access points around the lake. These areas often provide convenient starting points for the trails.
Yes, many of the mountain bike trails are circular, allowing you to start and end at the same point. A popular option is the Grand Réservoir de Vioreau – Lake Vioreau loop from Saint-Louis, which offers scenic views around the reservoir.
The area is highly rated by the komoot community, with an average score of 4.7 stars. Reviewers often praise the diverse terrain, the tranquility of the forest, and the beautiful views of the reservoir. Many appreciate the mix of easy lakeside rides and more challenging sections.
The 'Vioreau Pleine Nature' leisure base, located directly at the reservoir, often has facilities for refreshments. Additionally, the surrounding towns and villages, such as Joué-sur-Erdre, offer cafes and restaurants where you can refuel after your ride.
Ride durations vary significantly based on the trail length and your pace. For example, the Grand Réservoir de Vioreau – Lake Vioreau loop from La Jahotière, which is 23.2 miles (37.3 km), typically takes around 2 hours 44 minutes to complete.


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