4.5
(506)
2,157
riders
133
rides
Mountain biking around Réserve naturelle nationale de la baie de Saint-Brieuc offers diverse terrain for riders. The region is characterized by its coastal landscapes, including the expansive bay, estuaries, and surrounding countryside. Riders can expect a mix of paths along the coastline, through wooded areas, and over rolling hills. The natural reserve provides a varied environment for mountain bike trails, from easier coastal loops to more challenging inland routes.
Last updated: October 21, 2026
4.6
(5)
43
riders
28.5km
01:51
210m
210m
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.
4.3
(14)
80
riders
34.9km
02:28
300m
300m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.

6
riders
19.2km
01:21
180m
180m
Moderate mountain bike ride. Great for any fitness level. Advanced riding skills necessary.
3
riders
16.9km
01:10
130m
130m
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.
4.2
(18)
56
riders
46.1km
03:31
470m
470m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
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Popular around Réserve naturelle nationale de la baie de Saint-Brieuc
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And green algae.....
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We accidentally drove under the viaduct. Nice impression
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Our starting point. The house was unfortunately closed.
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From 1905 to 1948, the train made a stop there between Saint-Brieuc and Moncontour. The inhabitants of the Grèves used it frequently to get around and transport goods, particularly bricks produced by the nearby factory. It was called the "Petit train des Côtes-du-Nord", the former name of the department, because there was only 1 m spacing between its rails compared to 1.435 m on a normal track.
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Difficulty finding the start of the hike, so we chose the bay house.
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At the heart of the Saint-Brieuc Bay Nature Reserve, the Maison de la Baie, labeled Maison Nature, is a real gateway to discover a unique and fascinating heritage that must be preserved. The museum is a trail of 7 spaces that takes you from the top of the cliffs to the underwater world. Game booklet for children and translation booklets available free of charge at reception. Thematic nature outings are organized all year round by reservation. In all seasons and at all times, temporary exhibitions are accessible outdoors. Photo credit: Emmanuel Berthier
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Historical monument rated per 2018. Originally a rail connecton from 1905 till 1949.
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There are over 130 mountain bike trails in and around the Réserve naturelle nationale de la baie de Saint-Brieuc, offering a wide range of options for different skill levels.
Yes, the area features over 50 easy mountain bike trails. A good option for beginners is the Greves de langueux – Boutdeville Park loop from Langueux, which is 5.3 miles (8.6 km) long and leads through coastal areas and parkland.
Riders can expect diverse terrain, including coastal paths with views of the expansive bay, trails through wooded areas, and routes over rolling hills. The natural reserve provides a varied environment, from easier coastal loops to more challenging inland sections.
While most routes are moderate, there are 6 difficult trails for experienced riders seeking a greater challenge. These routes often feature more significant elevation changes and technical sections.
One of the longer routes available is the Ponts-Neufs Viaduct – Dahouët Harbour loop from Yffiniac, which spans nearly 31 miles (49.6 km) and offers extensive riding through varied landscapes.
Yes, many of the easy trails are suitable for families. The Greves de langueux – Boutdeville Park loop from Langueux is a great choice, offering a relatively short and accessible ride through scenic coastal areas and parkland.
The spring and autumn months generally offer the most pleasant conditions for mountain biking, with milder temperatures and less crowded trails. Summer can also be enjoyable, especially along the coast, but can be busier. Winter riding is possible, but trails may be muddy, and coastal winds can be strong.
Along the trails, you can discover various points of interest. Highlights include the scenic La Grève des Courses, the tranquil Boutdeville Park, and the expansive views from the Pointe du Grouin Viewpoint, offering glimpses of the bay's natural beauty.
Yes, the coastal nature of the reserve means many trails offer excellent viewpoints. The Pointe du Grouin Viewpoint is a notable spot for panoramic views of the bay, and other coastal sections provide stunning vistas.
The trails in Réserve naturelle nationale de la baie de Saint-Brieuc are highly rated by the komoot community, with an average score of 4.5 stars from over 380 reviews. Riders often praise the varied terrain, beautiful coastal scenery, and the well-maintained paths suitable for different skill levels.
Yes, parking is generally available at or near many of the popular trailheads and starting points around the Réserve naturelle nationale de la baie de Saint-Brieuc, particularly in towns like Hillion and Langueux. It's advisable to check specific route details for parking information.
Yes, the towns and villages surrounding the reserve, such as Saint-Brieuc, Hillion, and Langueux, offer various cafes, restaurants, and shops where you can refuel before or after your ride. Some coastal routes may also pass by establishments with refreshments.
Absolutely. Many routes in the area are designed as loops. A popular moderate circular route is the Pont-Neufs Viaduct – Ponts-Neufs Viaduct loop from La Grandville, which covers about 20.6 miles (33.1 km) and offers scenic views.


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