4.5
(223)
1,531
riders
25
rides
Mountain biking around Aire-Sur-La-Lys offers a network of routes through verdant landscapes and along charming waterways. The region is characterized by the Lys River and its canals, providing picturesque paths. While generally flat, some routes include unpaved sections and small hills, catering to various skill levels. The terrain is suitable for cross-country and touring mountain biking.
Last updated: May 4, 2026
4.5
(6)
20
riders
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
4.3
(3)
8
riders
28.1km
01:57
170m
170m
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.

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5.0
(2)
5
riders
24.6km
01:33
110m
110m
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.
7
riders
55.6km
03:42
300m
300m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
7
riders
58.8km
03:56
520m
520m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
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Marina on the canal, the cycle path is great up to there.
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Thérouanne was Sigeric's 77th stop on his return from Canturbey's pilgrimage to Rome. In the 19th century, this fortified town was a French enclave within the German Empire, but was razed by Charles V in 1553. On the hill north of the town are the remains of one of the first cathedrals built in the Gothic style in France. The famous Great God of Thérouanne, which adorned one of the portals, is now housed in Saint-Omer Cathedral.
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The small village of Delettes includes the hamlets of Upen d'Amont, Upen d'Aval, and Westrehem. Crossed by the Lys River, it boasts a pretty sluice mill built on the banks of the river.
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The Pont de Thiennes is a road bridge located on the Lys, connecting the municipalities of Thiennes and Aire-sur-la-Lys. The bridge is 200 metres long and was inaugurated in 2014. It is built of Soignies granite and was financed by the state (33.9%) for war damage, by the department of Pas-de-Calais (33.05%) and by the department of Nord (33.05%). The bridge is equipped with a lifting system to allow the passage of boats.
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Thérouanne is stop 77 of Sigeric on his return journey from Canterbury to Rome. The town is also located on the historic road between Boulogne and Arras (Chaussée Brunehaut). In the 16th century, this fortified town was a French enclave within the German Empire, but was razed to the ground by Charles V in 1553. On the hill to the north of the town lie the remains of one of the first cathedrals built in the Gothic style in France. The famous Grand dieu de Thérouanne, which once adorned one of the portals, is now in the cathedral of St-Omer.
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At the entrance to Thérouanne is the site where a magnificent cathedral stood in the Middle Ages... Today, there is practically nothing left on the surface, but a walk in this park after visiting the Maison de l'archéologie allows you to better immerse yourself in the history of Thérouanne and imagine the splendor of the city in medieval times.
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great place and lots of activities
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There are over 200 mountain bike trails around Aire-Sur-La-Lys, offering a wide variety of routes. The komoot community has explored these trails over 1500 times, providing an average rating of 4.5 stars.
The terrain around Aire-Sur-La-Lys is generally characterized by verdant landscapes, the Lys River, and its network of canals, offering picturesque paths. While often flat, you'll also find rolling hills and unpaved segments, providing varied experiences. The nearby Parc d'Olhain offers dedicated mountain biking trails with more challenging features.
Yes, Aire-Sur-La-Lys offers a good selection of easy mountain bike trails. Out of the over 200 routes, 72 are classified as easy, making them suitable for beginners or those looking for a more relaxed ride. These often follow towpaths along the waterways or through gentle countryside.
While many routes are moderate, the wider region, particularly the nearby Parc d'Olhain, offers more challenging mountain biking experiences. Some routes in the area feature significant elevation gains, such as the Small bridge – V1 Launch Ramp Remains loop from Thiennes, which has over 280 meters of ascent. These trails can include unpaved segments and require good fitness and riding skills.
Many trails follow the picturesque Lys River and its canals, offering charming waterside views. You can also explore areas like Les Ballastières, a natural haven reclaimed by nature, perfect for tranquil cycling. The The Thiennes Bridge – Passerelle de la Lys loop from Aire-sur-la-Lys, for example, offers scenic views along the water's edge.
Yes, you can combine your ride with visits to historical sites. The Aire-sur-la-Lys Belfry – Linghem Wood loop from Aire-sur-la-Lys passes by the UNESCO-listed Belfry. Other notable attractions include the Saint-Pierre Collegiate Church of Aire-sur-la-Lys and The Thiennes Bridge. The Small bridge – V1 Launch Ramp Remains loop from Thiennes also features sections near historical sites.
Yes, the generally flat terrain along the River Lys and canals provides excellent family-friendly cycling opportunities. Many towpaths are smooth and accessible, suitable for various types of bicycles. Look for trails marked as 'easy' for the most suitable options for families.
Many trails in the Aire-Sur-La-Lys region are suitable for cycling with dogs, especially those along the riverbanks and through the countryside. However, it's always recommended to keep your dog on a leash and be mindful of other trail users and local regulations, particularly in nature reserves or private lands.
The lush countryside and waterways of Aire-Sur-La-Lys are enjoyable throughout much of the year. Spring and autumn offer pleasant temperatures and beautiful scenery. Summer is also popular, though it can be warmer. Winter riding is possible, but some unpaved sections might be muddy, so check conditions beforehand.
Yes, many of the mountain bike routes around Aire-Sur-La-Lys are designed as loops. Examples include the Home – Château de la motte au bois loop from Thiennes and the Delettes – Woodland Singletrack loop from Saint-Augustin, allowing you to start and finish at the same point.
Parking is generally available in and around Aire-Sur-La-Lys, particularly near the town center, the marina, and at various starting points for trails. For specific routes, it's advisable to check the individual komoot tour pages for details on recommended parking spots.
Aire-Sur-La-Lys and its surrounding villages offer various cafes, pubs, and restaurants where you can refuel. The town center itself has many options. Some routes might pass through or near smaller villages with local establishments, providing opportunities for a break.


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