4.4
(94)
5,760
riders
266
rides
Road cycling around Clairmarais features a distinctive landscape characterized by the expansive Audomarois marsh, an intricate network of canals, and the adjacent Rihoult-Clairmarais forest. The terrain is predominantly flat, offering extensive no traffic road cycling routes with minimal elevation gain. This region provides a blend of wetlands, shaded forest paths, and quiet paved surfaces, making it suitable for various cycling preferences.
Last updated: May 22, 2026
4.7
(3)
76
riders
54.8km
02:27
300m
300m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
5.0
(1)
63
riders
39.5km
01:41
170m
170m
Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.

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5.0
(1)
72
riders
22.6km
00:58
80m
80m
Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.
5.0
(1)
53
riders
38.0km
01:39
260m
260m
Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.
5.0
(1)
45
riders
Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.
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Popular around Clairmarais
On the top of Kasselberg once stood about twenty windmills. The last mill caught fire on October 30, 1911, which could be seen far into the surrounding area. In 1947, the Ruytoor mill in Arneke was purchased by the local Syndicat d'Initiative, to be opened to the public on July 14, 1949. The mill has two different installations: it functions as a gristmill, which produces organic flour. An electric installation functions as an oil mill, for the production of both rapeseed oil and linseed oil. Near the mill, there is an orientation table and a statue of Maréchal Foch.
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starting point for quite a few hikes
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here is an information board with all tourist information
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There are over 250 dedicated no-traffic road cycling routes around Clairmarais, offering a wide variety of options for all skill levels. You'll find everything from easy, flat rides through the marshlands to more moderate loops with gentle elevation changes.
Clairmarais is uniquely suited for no-traffic road cycling due to its extensive network of quiet roads and paved paths winding through the Audomarois marsh. The mostly flat terrain, combined with the intricate 'watergangs' (canals) and the peaceful Rihoult-Clairmarais forest, provides a serene and car-free environment perfect for road bikes.
Yes, Clairmarais offers numerous easy, traffic-free routes perfect for beginners or families. Many routes are relatively flat and explore the tranquil marshland. An example is the Claimarais Cave loop from Saint-Omer, which is an easy 22.6 km ride, allowing you to enjoy the scenery without significant challenges.
You can expect a diverse range of landscapes. Routes often traverse the unique Audomarois marsh, characterized by its intricate network of canals and rich biodiversity. You'll also find paths leading through the shaded Rihoult-Clairmarais forest, offering a contrasting, wilder experience. Some routes, like the Cassel – Cassel Village loop from Saint-Omer, extend to areas with gentle hills and picturesque village views.
Absolutely. Many of the no-traffic road cycling routes around Clairmarais are designed as loops, allowing you to start and end at the same point. For instance, the Quai du Commerce, Arques – Claimarais Cave loop from Saint-Omer offers a 42.2 km circular ride through varied landscapes.
Several interesting attractions are accessible from the no-traffic road cycling routes. You can cycle past the tranquil Romelaëre Ponds Nature Reserve, known for its birdwatching opportunities, or explore the historic Cassel Old Town. Other points of interest include the impressive Boat Lift of Fontinettes and the serene Harchelle Lake.
The area is highly rated by the komoot community, with an average score of 4.4 stars from over 100 ratings. Reviewers often praise the peaceful, car-free environment, the unique marshland scenery, and the well-maintained paths that make for enjoyable road cycling experiences.
While many routes are easy to moderate, there are options for more experienced riders seeking longer distances and some elevation. The Cassel – Montée de Cassel loop from Saint-Omer is a moderate 54.5 km route with over 300 meters of elevation gain, offering a good challenge while still focusing on quiet roads.
Many routes start from or pass near Saint-Omer, which has a train station (Saint-Omer station). This makes it convenient to access the region by public transport and begin your no-traffic road cycling adventure from there.
Yes, parking is generally available in and around Clairmarais and nearby towns like Saint-Omer, which serve as common starting points for many routes. You can typically find parking facilities close to the beginning of your chosen route.
The spring, summer, and early autumn months generally offer the most pleasant conditions for no-traffic road cycling in Clairmarais. During these seasons, the weather is milder, and the marshland flora is vibrant, enhancing the scenic beauty of the routes. Winter cycling is possible, but be prepared for cooler temperatures and potentially wet conditions.
Absolutely. The Audomarois marsh and the Romelaëre Ponds Nature Reserve are rich in biodiversity. Cycling along these no-traffic routes provides excellent opportunities for wildlife spotting, especially birds and various aquatic species in the canals and ponds. Observatories are also available in the nature reserve for closer viewing.


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