4.4
(261)
1,474
riders
112
rides
Mountain biking around Réserve naturelle de la baie de Somme features a diverse estuarine environment, recognized for its vast stretches of sand, dunes, and coastal areas. The region includes extensive mudflats and salt meadows, alongside the Forêt de Crécy with its ancient trees. While many paths are relatively flat, dedicated mountain biking trails offer varying technical difficulties.
Last updated: May 29, 2026
3.7
(3)
20
riders
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.
4.5
(4)
25
riders
24.8km
01:30
80m
80m
Moderate mountain bike ride. Great for any fitness level. Advanced riding skills necessary.

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14
riders
33.3km
01:50
40m
40m
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.
4.5
(6)
40
riders
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.
4.5
(13)
67
riders
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.
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Popular around Réserve naturelle de la baie de Somme
At the crossroads of dunes, marshes, and pine forests, the Marquenterre Park is a 260-hectare natural sanctuary, in the heart of the Baie de Somme. 🕊Here, hundreds of species of migratory birds stop over — and you can observe them from thirteen observation huts spread along an immersive six-kilometer route (with shorter options). 🔎 Whether visiting freely or on a guided tour, passionate naturalist guides share their knowledge with you, each season. 📸 The park also offers themed walks, photo and ornithology workshops to deepen the experience. 🚲 Good to know for cyclists: - Easy access via cycle paths (Baie de Somme, Le Crotoy…) - On-site bike parking, catering, nature shop/bookstore - Binoculars recommended (available for rent on site) 👉 A must-see for lovers of wild nature and wide open spaces.
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The bay of summer, on our trip it was low tide.
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Le Port du Crotoy is a charming stop on your mountain bike ride, with its picturesque harbour full of colourful fishing boats and traditional sailing ships. As you walk along the harbour, you can enjoy the lively atmosphere and views of the Baie de Somme. It’s the perfect place to take a break, soak up the maritime charm and perhaps grab a bite to eat at one of the waterfront cafés.
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Magnificent view of the Bay of Somme at the port of Saint-Valery-sur-Somme. The largest French colony of harbor seals has taken up residence in the Bay of Somme, and you can see them here at high tide.
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Cross the Bay of the Somme from Crotoy, take the steam train back and then go to Le Hourdel to see the seals, that's all you need for a wonderful holiday. https://youtu.be/nenNw-_0ADE
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Cute place, unfortunately also very busy.
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nice little train station with railway running through the area
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Magnificent landscapes but walking is more difficult in the sand...
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There are over 110 mountain bike trails available in the Réserve naturelle de la baie de Somme, offering a wide range of options for different skill levels and preferences.
The majority of mountain bike trails in the Baie de Somme are classified as easy or moderate. Specifically, there are 64 easy routes, 47 moderate routes, and 1 difficult route, ensuring options for beginners to more experienced riders.
Mountain biking in the Baie de Somme offers a diverse range of landscapes. You'll encounter vast stretches of sand, dunes, and coastal areas, as well as extensive mudflats and salt meadows. The region also features the Forêt de Crécy with its ancient trees, providing shaded routes. This mix creates constantly changing scenery, from estuarine environments to forested sections.
Yes, the Réserve naturelle de la baie de Somme is a critical site for ornithology, hosting 65% of European bird species. You can spot numerous birds, and it's also home to the largest French colony of common seals. Routes like Parc du Marquenterre – Farm track loop from Saint-Quentin-en-Tourmont explore areas known for wildlife, and seals can often be observed around the Pointe du Hourdel at low tide.
Yes, several routes pass by notable attractions. You can explore the area around the Marquenterre Park, a renowned ornithological reserve. Other highlights include the Marquenterre Park Observatory and scenic viewpoints like Beautiful view of the marshes. The region also features the medieval town of Saint-Valery-sur-Somme.
Absolutely. Many trails in the Baie de Somme are relatively flat and well-maintained, making them ideal for families. There are 64 easy routes, providing safe and enjoyable rides for all ages. For example, the Port of Le Crotoy – Le Crotoy loop from Pointe à Guille is an easy coastal path suitable for a family outing.
While many natural areas in France have restrictions on dogs, especially in protected reserves to protect wildlife, some paths may allow dogs on a leash. It's best to check specific local regulations for each trail or area within the Réserve naturelle de la baie de Somme before heading out with your dog. Generally, dogs are often permitted on public paths but may be restricted in sensitive wildlife zones like the Parc du Marquenterre.
Yes, many mountain bike routes in the Baie de Somme are designed as circular loops, allowing you to start and finish at the same point. Examples include the Parc du Marquenterre – Farm track loop from Saint-Quentin-en-Tourmont and the Somme Bay – Saint-Valery-sur-Somme loop from Le Hourdel.
The Baie de Somme is enjoyable for mountain biking throughout much of the year. Spring and autumn offer pleasant temperatures and beautiful scenery, especially for birdwatching during migration seasons. Summer is also popular, but trails can be busier. Winter can be an option, but be prepared for cooler, potentially wetter conditions, and check local weather forecasts.
The mountain bike trails in Réserve naturelle de la baie de Somme are highly rated by the komoot community, with an average score of 4.4 stars from over 360 reviews. Mountain bikers often praise the diverse estuarine environments, coastal paths, and forested sections, as well as the options for different ability levels.
While many routes are easy to moderate, some longer options are available. For example, the Somme Bay – Parc du Marquenterre loop from Pointe à Guille is a moderate 36.9 km (22.9 miles) route, offering a more extended ride through varied terrain.
Parking availability varies by trailhead. Many routes, especially those starting from towns or popular attractions like the Parc du Marquenterre or Le Hourdel, will have designated parking areas. It's advisable to check the specific route details on komoot for information on starting points and potential parking facilities.


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