4.4
(40)
2,242
riders
208
rides
Road cycling routes around Delettes are characterized by a blend of vast agricultural plains and rolling countryside, offering varied terrain for cyclists. The region, part of the wider Pays de Saint-Omer, features roads with gentle, regular climbs and flat stretches. Cyclists can explore areas near the Lys Valley, known for its verdant scenery, and encounter historic villages and water mills.
Last updated: July 3, 2026
3.0
(1)
55
riders
91.5km
03:53
370m
370m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
4
riders
34.8km
01:32
350m
350m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

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4
riders
23.0km
01:03
250m
250m
Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.
9
riders
23.8km
01:02
80m
80m
Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.
3
riders
60.4km
02:45
640m
640m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
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The belfry of Aire-sur-la-Lys (in Dutch: Ariën-aan-de-Leie) is a historic, baroque belfry in the French department of Pas-de-Calais that has been on the UNESCO World Heritage list since 2005. The striking tower is attached to the town hall and dominates the skyline of the historic town.
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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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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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and the cemetery crucifix
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This Spanish mill was built around 1635, on the banks of the Lacquette River. It produced flour until 1938, then milling for livestock. It was bought in 1974 to be transformed into a home. It is built with brick and stone (white limestone). All that remains of the original building is the north gable (17th century), and also a porch. The water wheel is still in place but it no longer turns. The dam forms a pretty waterfall. A turret was added on the river side. It is a very beautiful private home with a beautiful garden in which you can see a stone fountain.
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The Beffroi d'Aire-sur-la-Lys is a monument that is part of the heritage of Aire-sur-la-Lys. It was first built in 1355 and rebuilt between 1716 and 1724 by the architect Hérogue. It has been listed as a historic monument since 1947 together with the adjacent town hall1. The beffroi is 45 meters high and rests on four large pillars of brick and stone, two meters thick, which demarcate an interior space of six meters wide. It is of Baroque style and is part of the list of 23 belfries inscribed on the UNESCO World Heritage List in 2005 as part of the list of "Belfries of Belgium and France".
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The region around Delettes offers a diverse road cycling experience. You'll find a mix of vast agricultural plains, perfect for maintaining a steady pace, and rolling countryside with gentle but regular climbs that provide engaging variation without being overly strenuous. The area also features scenic routes near the Lys Valley, known for its verdant landscapes.
There are over 200 road cycling routes available around Delettes. These routes cater to various skill levels, with approximately 40 easy routes, 150 moderate routes, and 15 more challenging options for experienced cyclists.
Yes, there are several easy road cycling routes suitable for families. For instance, the Cycle lane away from the road loop from Cléty is an easy 19.2-mile (30.8 km) route that offers a smooth ride, often away from main roads, making it a good option for families.
Road cycling routes around Delettes often pass through charming villages and near historical sites. You could encounter the historic Moulin Espagnol d'Enquin les Mines, a 17th-century former water mill, or the ancient Le Moulin Pidoux. The region also features the significant historical site of The Dome (La Coupole) near Helfaut-Wizernes, a former V2 rocket base.
Yes, many of the road cycling routes in the Delettes area are designed as loops, allowing you to start and finish in the same location. Examples include the Thérouanne – Étang de Rebecques loop from Thérouanne and the Source of the Lys – Source of the River Lys loop from Erny-Saint-Julien, which takes you through the picturesque Lys Valley.
The road cycling routes around Delettes are highly regarded by the komoot community, with an average rating of 4.6 stars from over 30 reviews. Cyclists often praise the varied terrain, from flat agricultural plains to gentle climbs, and the scenic beauty of the Lys Valley and charming villages.
The Pays de Saint-Omer region, including Delettes, is generally pleasant for road cycling from spring through autumn. These seasons offer milder temperatures and more stable weather conditions, making for an enjoyable experience. While specific weather conditions can vary, French roads are often noted for their smooth surfaces, which contribute to a good ride in most conditions.
Absolutely. The region offers routes of varying lengths. For example, the Source of the Lys – Source of the River Lys loop from Erny-Saint-Julien is a moderate 37.8-mile (60.9 km) trail, typically completed in about 3 hours, providing a substantial ride through scenic landscapes.
While Delettes itself is a smaller commune, the surrounding Pays de Saint-Omer region features charming, typical villages where you can often find local cafes or small shops to pause and refuel. Larger towns like Saint-Omer, which is approximately 15 km from Delettes, offer more amenities and dining options that can be incorporated into longer routes.
While specific dedicated cycling parking facilities in Delettes are not detailed, as a commune in France, you can typically find public parking in village centers or near local amenities. For routes starting from nearby towns, such as Thérouanne or Cléty, there are usually parking areas available for visitors.
Many routes showcase the region's natural beauty. The Lys Valley is particularly noted for its verdant scenery, and routes like the Source of the Lys – Source of the River Lys loop from Erny-Saint-Julien offer picturesque views along the river. The rolling countryside also provides scenic vistas and a sense of rural tranquility.


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