4.5
(227)
1,236
riders
108
rides
Mountain bike trails around Petit-Mars are characterized by the varied landscapes of the Erdre valley, offering a mix of marshlands, bocage, and riverside paths. The region features a network of trails, including the "Circuit des Marais," which provides opportunities to explore local wetlands. Terrain often includes sunken lanes and dirt roads, providing diverse riding conditions for mountain bikers. The proximity to the Canal de Nantes à Brest also offers accessible routes along its towpaths.
Last updated: October 8, 2026
5.0
(1)
58
riders
53.5km
03:52
520m
520m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
5.0
(6)
27
riders
28.2km
01:53
140m
140m
Moderate mountain bike ride. Great for any fitness level. Advanced riding skills necessary.

5.0
(7)
22
riders
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
3.8
(4)
16
riders
38.6km
02:26
210m
210m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
4.5
(2)
15
riders
46.3km
03:12
330m
330m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
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Very beautiful building in Oudon, which is worth seeing. I recommend going to admire it!
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Dominating the Loire majestically, the Donjon d'Oudon is an impressive medieval tower from the 14th century housing an original scenography on the history of river navigation. It offers from its summit an exceptional panorama of the river and the surrounding valley.
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Nestled in the heart of a wooded and preserved valley, the **Ruisseau de l'Étang Hervé** is a small, picturesque watercourse that calmly winds its way through the countryside before feeding the Gesvres. It is a true haven of freshness and biodiversity, particularly appreciated by hikers for the peaceful and intimate atmosphere it offers along its shaded trails. This wooden decking and footbridges that allow crossing the wetland and protected area of the **Marais du Ruisseau de l'Étang Hervé** were installed recently. The development work for this pedestrian path was awarded at the end of 2018 and the construction site was finalized and delivered between **late 2020 and early 2021** by the local company *Bois Loisirs Créations*. It is a superb structure that allows you to enjoy the coolness of the marsh without sinking into the mud and without damaging the ecosystem!
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One of the few vineyards that can be found on the northern Loire part of Nantes
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Nestled in a preserved green setting in Carquefou, **Port-Jean** is a former freight port transformed into a bucolic haven of peace, ideal for a shaded stop or a stroll along the Erdre.
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Flat, quiet and relaxing path. You have to take advantage of it, there aren't many in the area.😅
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Mountain biking around Petit-Mars offers a diverse experience, characterized by the varied landscapes of the Erdre valley. You'll find a mix of marshlands, bocage, and riverside paths, with terrain often including sunken lanes and dirt roads. The region features a network of routes, including the "Circuit des Marais," which allows for exploration of local wetlands.
Yes, Petit-Mars offers a good selection of trails for beginners. There are 21 easy routes available, providing accessible options for those new to mountain biking or looking for a more relaxed ride. These often follow towpaths along the Canal de Nantes à Brest or wind through less challenging terrain.
For scenic rides, consider routes that explore the Erdre valley and its waterways. The Oudon Castle – Oudon Keep loop from Petit-Mars offers picturesque views as it winds through the valley. Another option is the Quay at Sucé-sur-Erdre – Singletrack in the forest loop from Saint-Mars-du-Désert, which takes you along the Erdre river.
Yes, many mountain bike routes in the Petit-Mars area are designed as loops. Examples include the Oudon Castle – Oudon Keep loop from Petit-Mars, which is a popular 46.5 km trail, and the Launay loop from Saint-Mars-du-Désert, a moderate 28.2 km route.
While mountain biking near Petit-Mars, you can encounter several points of interest. Along the Erdre river, you might pass by the Sucé-sur-Erdre marina or the Port of Nort-sur-Erdre. Further afield, the Vioreau Reservoir Dam is another notable landmark. The region also features historical manors and mills, though these may not be directly on mountain bike trails.
The mountain bike trails around Petit-Mars are highly regarded by the komoot community, with an average rating of 4.5 stars from over 180 reviews. Riders often praise the varied terrain, the scenic beauty of the Erdre valley, and the network of trails that cater to different skill levels.
While the majority of trails in Petit-Mars are easy to moderate, there is at least one difficult route available for experienced mountain bikers seeking a greater challenge. The region's terrain, with its sunken lanes and varied landscapes, can offer technical sections even on moderate routes.
Petit-Mars is not primarily known as a major mountain biking hub, so many of its trails, especially those away from popular riverside paths, tend to be less crowded. Exploring routes through the bocage landscape or lesser-known marshland circuits can offer a more solitary riding experience.
While specific public transport links directly to trailheads for mountain biking are not extensively highlighted, the broader Loire-Atlantique region has public transport options. For routes along the Canal de Nantes à Brest, it may be possible to access starting points via local bus services that connect to nearby towns, though planning ahead is recommended.
The best time for mountain biking in Petit-Mars generally aligns with milder weather conditions. Spring and autumn offer pleasant temperatures and vibrant natural scenery, making them ideal. Summers can be warm, while winters might bring wetter conditions, especially in marshland areas, which could affect trail surfaces.
Yes, several routes offer longer distances for extended rides. For example, the Tunnel Under the Road – La Ferrière loop from La Grée covers approximately 46.4 km, while the Sucé sur Erdre bridge and port – Descent of the pap loop from Saint-Mars-du-Désert is around 39.7 km, providing good options for longer excursions.


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