4.3
(12)
76
riders
8
rides
No traffic gravel bike trails around Lagny-Le-Sec traverse the tranquil countryside of the Oise department in France. The region is characterized by extensive forests, including Ermenonville Forest and Forêt de Chantilly, offering diverse terrain for gravel biking. Riders will find a mix of unpaved roads, forest paths, and country lanes, providing varied surfaces and scenic routes. This landscape features gentle hills and unique geological formations like sandstone blocks, making it suitable for exploring on a gravel bike.
Last updated: May 8, 2026
55.6km
04:03
310m
330m
Hard gravel ride. Good fitness required. You may need to push your bike for some segments of this route.
4.4
(7)
30
riders
48.6km
02:44
250m
250m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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2
riders
60.5km
04:07
530m
530m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
4.0
(1)
8
riders
67.6km
04:01
380m
380m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
3.7
(3)
15
riders
41.7km
02:13
200m
200m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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A towpath, or "chemin de halage," which runs alongside the river or canal, was an indispensable part of the transportation infrastructure in earlier times. Before ships could be propelled by motors, horses walked along the bank, pulling the vessel against the current. This was called "treideln," and that's how towpaths got their name, which has been passed down to this day. Where these paths, located directly on the riverbank, have been preserved, they are popular with hikers and cyclists.
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magnificent castle, a superb park
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The Great Stables of the Château de Chantilly, built in the 18th century by Louis-Henri de Bourbon, Prince of Condé, are among the most majestic in the world. A masterpiece of classical architecture by Jean Aubert, they have housed the Living Museum of the Horse, dedicated to equestrian art, since 1982. This site has been owned by the Institut de France since 1886.
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The Château de Thiers-sur-Thève, now in ruins, is a former 13th-century fortified castle listed as a Historic Monument in 1862. Built as a hunting lodge for the bishops of Beauvais, it is distinguished by its large state room pierced with large windows, a rare example of medieval residential architecture in the Île-de-France region. Partially dismantled in the 15th century, its circular towers, moats, and Gothic remains can still be admired.
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The Bruyères de Frais-Vent, located in the Ermenonville forest in the Montlognon woods, constitute an exceptional natural site. It is the only place in the massif where large blocks of sandstone rest on a vast layer of Fontainebleau sand.
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Listed as a Historic Monument since 1862, the church of Montagny-Sainte-Félicité stands apart from the village, on the site of a former priory dependent on the Abbey of Saint-Vincent de Senlis. Rebuilt in the 16th century in a flamboyant Gothic style, it is distinguished by its tall, 30-meter openwork octagonal spire, one of the most elegant in the Oise.
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Great walk for all levels that offers beautiful scenery!
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Pleasant and revitalizing place
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There are 8 dedicated traffic-free gravel bike trails around Lagny-Le-Sec, offering a variety of experiences for different skill levels.
The region around Lagny-Le-Sec, with its forests and tranquil country roads, is generally pleasant for gravel biking from spring through autumn. Spring offers blooming landscapes, while autumn provides beautiful foliage. Winter can be ridden, but trails might be muddier, especially in forested areas like Ermenonville Forest.
Yes, there is one easy route available. For a moderate option that's still very accessible, consider the Chantilly Castle – Chantilly Castle loop from Montlognon, which offers a scenic ride through varied terrain without being overly challenging.
The trails around Lagny-Le-Sec offer a diverse mix of terrain. You'll encounter paths through extensive forests like Ermenonville, sections with unique geological formations such as the sandstone blocks at Les Bruyères de Frais-Vent, and tranquil country roads. This provides a good balance of gravel, dirt, and some paved sections.
Absolutely! Many routes pass by or near significant historical sites. You could incorporate a visit to the medieval Château d'Ermenonville or the impressive Chaalis Abbey, which features ruins, a museum, and gardens. These offer a cultural interlude to your ride.
The komoot community highly rates the gravel biking experience around Lagny-Le-Sec, with an average score of 4.3 stars. Reviewers often praise the tranquility of the routes, the beautiful forested sections, and the opportunity to explore historical landmarks away from traffic.
Yes, for experienced riders seeking a challenge, there are two difficult routes. One such option is the Plessis-Belleville to Coye-la-Forêt – Tour de l'Oise gravel, which covers over 50 km and features significant elevation changes, offering a demanding yet rewarding ride.
Many of the gravel routes in the area are designed as loops. For example, the Chantilly Castle – Chantilly Castle loop from Le Plessis-Belleville offers a substantial circular ride, allowing you to start and finish at the same point without retracing your steps.
Yes, within the Ermenonville Forest, you can find Les Bruyères de Frais-Vent, an exceptional natural site known for its large sandstone blocks resting on Fontainebleau sand. This unique geological formation adds an interesting visual and textural element to the trails in that area.
While specific public transport connections to every trailhead can vary, some routes, like the Senlis, medieval city – Senlis bus station loop from Othis, are designed with proximity to transport hubs in mind, making them more accessible for those relying on public transport.
Parking availability varies by trailhead. For routes starting near towns or popular attractions like Chantilly Castle, designated parking areas are generally available. For trails deeper within forests like Ermenonville, look for forest parking lots or designated roadside parking spots, often indicated on local maps or within the komoot tour details.


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