4.5
(44)
497
riders
43
rides
Mountain bike trails around Le Sourn offer diverse terrain within the Morbihan department of Brittany, France. The region is characterized by the scenic Blavet Valley, featuring steep cliffs, hills, and a lush environment shaped by the Blavet river and its tributaries. Mountain bikers can expect varied relief, including rural paths, forest trails, and undulating terrain across valleys and streams.
Last updated: July 4, 2026
4.8
(8)
64
riders
46.6km
02:42
220m
220m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
5.0
(3)
38
riders
40.9km
02:20
350m
350m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

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5.0
(2)
21
riders
32.3km
02:14
300m
300m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
4.5
(2)
28
riders
43.8km
03:05
430m
430m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
4.6
(5)
21
riders
49.1km
02:42
350m
350m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
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The chapel is nestled close to the rocks on the other side of the river. It can be reached via hiking trails on the other side.
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The old castle is now partially open to the public. It looks very defensive.
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This beautiful water town, famous for its Château des Rohans, is located in Argoat. That is to say in the very center of the Breton peninsula. It is a city which has preserved the Napoleonic memory of the great works carried out during the reign of the emperor. The Blavet is experiencing spectacular floods here which have left their mark on the inhabitants. The most recent ones date from January 1995 and February 2014.
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Here, the Blavet meets the Nantes-Brest canal. It was Napoleon Bonaparte, then first consul, who decided on September 17, 1802 to channel the Blavet from Pontivy to Lorient. The project was titanic and lasted more than 30 years.
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There are 28 locks which allow navigation between Pontivy and Hennebont. These structures, built in the 19th century, are still very important for the many pleasure boats. The lock keeper moves from one lock to another to allow boats to continue their journey in the Blavet valley.
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There are 28 locks which allow navigation between Pontivy and Hennebont. These structures, built in the 19th century, are still very important to the many pleasure boats that sail here. The lock keeper moves from one lock to another to allow boats to continue their journey in the Blavet valley.
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A very nice climb before enjoying this grandiose panorama in clear weather, but the effort is definitely worth it.
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Missing the first section of 12km (not started recording)
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There are over 40 mountain bike trails available around Le Sourn, offering a wide range of options for different skill levels and preferences. The komoot community has explored these routes over 400 times.
Mountain biking in Le Sourn offers a diverse range of terrain, primarily within the scenic Blavet Valley. You can expect varied relief, including steep cliffs, hills, rural paths, and forest trails. The region is known for its wild moors, undergrowth, and rocky sections, providing a natural and engaging riding experience.
Yes, Le Sourn offers trails suitable for various skill levels. There are 11 easy mountain bike routes, which are often flatter and follow waterways like the Blavet river, making them ideal for beginners or families looking for a more relaxed ride. For example, the Ecluse – Le Divit Lock loop from Pontivy is a moderate route that follows the river, offering a mix of riverside paths and natural scenery.
Yes, many of the mountain bike trails around Le Sourn are designed as loops, allowing you to start and finish at the same point. For instance, the Pontivy – St Patern /Guern loop from Pontivy is a popular moderate loop exploring varied landscapes.
The Blavet Valley itself is a 'jewel case of greenery,' offering picturesque routes with varying elevations that provide views, including glimpses of nearby Pontivy. Trails like the Cascade Lock – Pontivy Castle loop from Pontivy lead through this beautiful valley, showcasing its lush environment and natural features.
Many trails in the Le Sourn area offer opportunities to see historical and natural landmarks. You might encounter sights such as Pontivy Castle, various locks along the Blavet river, and the scenic Canal de Nantes à Brest. The region's valleys and streams also provide beautiful natural scenery.
The region's lush environment and varied terrain make it enjoyable for mountain biking across several seasons. Spring and autumn often provide pleasant temperatures and vibrant scenery. However, due to the presence of wild moors and undergrowth, some paths might be wetter during rainy periods, which can add to the challenge for experienced riders.
Yes, while many routes are moderate, the varied relief, steep cliffs, and undulating terrain across valleys and streams can offer physically demanding circuits. There is at least 1 difficult mountain bike route available, and many of the 29 moderate routes can provide a good challenge, especially those with more elevation gain or technical sections.
While specific parking areas for each trail are not detailed, many routes, such as the Ville Pérot lock – Écluse de la Forêt loop from Pontivy, start from Pontivy. Pontivy, being a larger town nearby, typically offers various parking options from which you can access the trail network. It's advisable to check local parking regulations upon arrival.
The region of Brittany generally welcomes dogs on outdoor trails, provided they are kept under control. While specific dog policies for each mountain bike trail in Le Sourn are not available, it's usually acceptable to bring your dog on natural paths. Always ensure your dog is well-behaved, on a leash where required, and that you clean up after them to respect other users and the environment.
The mountain bike trails around Le Sourn are highly rated by the komoot community, with an average score of 4.6 stars from over 40 reviews. Riders often praise the diverse terrain, the scenic beauty of the Blavet Valley, and the extensive network of rural and forest paths that offer a range of experiences from leisurely rides to more physically demanding circuits.
Yes, for those looking for longer rides, there are several options. For example, the Écluse de la Forêt – Guerlédan Trail loop from Pontivy is a substantial route covering over 85 kilometers, offering an extended exploration of the region's landscapes.


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