4.3
(5)
37
riders
10
rides
Gravel biking around Aire-Sur-La-Lys features a diverse landscape, characterized by river valleys, wooded areas, and agricultural plains. The region offers varied terrain, from gentle paths along waterways like the Lys to more challenging routes through ravines and past historic châteaux. Elevations range from relatively flat sections to climbs exceeding 700 meters, providing options for different fitness levels.
Last updated: May 23, 2026
5
riders
47.0km
02:48
200m
200m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5
riders
52.6km
04:11
770m
770m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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4
riders
56.6km
03:32
250m
250m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
4.0
(2)
4
riders
34.1km
01:52
30m
30m
Easy gravel ride. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels.
4
riders
55.9km
04:11
680m
680m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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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 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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From 1859 onwards, the permanent church was built and in 1860 the tower was built. In 1865 the choir was restored and in 1866 a new sacristy was built. This church was consecrated in 1872. The stained glass windows of this church show the coats of arms of the bishops of the former diocese of Thérouanne. They were installed in 1901-1902.
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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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The neo-Gothic church was built before 1597 and replaced another building from the 11th century, which stood near the current chapel of Notre-Dame des Affligés. It was partially rebuilt in 1855. The tower dates from 1683. The originality of this construction lies in the fact that the bell tower is not above the entrance door, but above the choir. The door is simply formed by a pointed arch decorated with a pentacle. The first two bays of the nave are built of red brick and the last two in chalk. The four bays of the nave also have a pointed arch. The bell tower is formed by a gable wall that projects above the nave. The buttresses on this side are placed in line with the wall, creating a flat surface. The buttresses of the bell tower on the choir side are well placed on the corners
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The region of Aire-Sur-La-Lys offers a diverse landscape for gravel biking, characterized by river valleys, wooded areas, and agricultural plains. You'll find varied terrain, from gentle paths along waterways like the Lys to more challenging routes through ravines and past historic châteaux. Elevations can range from relatively flat sections to climbs exceeding 700 meters.
Yes, Aire-Sur-La-Lys offers routes suitable for various skill levels, including beginners. There is at least one easy route available, and many moderate trails that can be a good next step. For a relatively flat experience, consider routes that stick to the riverine landscapes, such as the Saint-Venant Marina – Passerelle de la Lys loop from Haverskerque, which has minimal elevation gain.
For experienced gravel bikers seeking a challenge, Aire-Sur-La-Lys has several difficult routes. The Saint-Omer Valley – Pihem Ravine loop from Pihem is a notable option, featuring significant elevation gain of over 770 meters and traversing valleys and ravines. Another demanding route is the Saint Martin Church – Saint-Léger Church, Cléty loop from Pihem, which also includes substantial climbing.
Yes, many gravel routes around Aire-Sur-La-Lys offer substantial distances. For example, the Linghem Wood – The Thiennes Bridge loop from Ham-en-Artois covers over 56 kilometers, providing a good option for a longer ride. The Saint-Omer Valley – Pihem Ravine loop from Pihem is also over 52 kilometers, combining distance with significant elevation.
The gravel bike trails around Aire-Sur-La-Lys often pass by interesting historical and natural landmarks. You might encounter structures like the historic The Thiennes Bridge, or the impressive Boat Lift of Fontinettes. The region also features charming religious buildings such as the Saint-Pierre Collegiate Church of Aire-sur-la-Lys, offering cultural points of interest during your ride.
While gravel biking can be enjoyed year-round, the spring and autumn months generally offer the most pleasant conditions in Aire-Sur-La-Lys, with milder temperatures and beautiful scenery. Summer can also be excellent, though it's advisable to start earlier in the day to avoid the midday heat. Winter rides are possible, but be prepared for cooler temperatures and potentially muddy sections, especially in wooded or agricultural areas.
Yes, many of the gravel bike routes in Aire-Sur-La-Lys are designed as loops, allowing you to start and finish at the same point. Examples include the popular Château de la motte au bois – The Thiennes Bridge loop from Roquetoire and the Saint-Venant Marina – Passerelle de la Lys loop from Haverskerque, both offering convenient circular journeys.
The gravel biking routes in Aire-Sur-La-Lys are highly rated by the komoot community, with an average score of 4.4 stars from 8 reviews. Reviewers often praise the diverse terrain, which combines river valleys, woodlands, and agricultural fields, offering a varied and engaging riding experience for all ability levels.
While specific crowd levels can vary, exploring routes slightly off the main tourist paths or during off-peak hours (weekdays, early mornings) can lead to a more serene experience. The region has a network of 14 gravel tours, offering plenty of choices beyond the most popular ones, allowing you to find quieter sections, especially in the agricultural plains and smaller wooded areas.
The routes often pass through or near charming French villages and towns where you can typically find local cafes, bakeries (boulangeries), or small pubs (brasseries) to refuel. While specific establishments aren't listed for each trail, planning your route to include stops in towns like Aire-sur-la-Lys, Haverskerque, or Pihem will likely provide opportunities for refreshments.
Given the varied landscape of river valleys and elevated sections, many routes offer scenic views. Trails that traverse ravines or climb to higher elevations, such as the Saint-Omer Valley – Pihem Ravine loop from Pihem, are likely to provide panoramic vistas of the surrounding countryside and agricultural fields.
There are over a dozen gravel bike trails available in the Aire-Sur-La-Lys region, offering a good selection for different preferences and skill levels. The network includes easy, moderate, and difficult routes, ensuring there's something for everyone.


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