4.6
(82)
252
riders
69
rides
Mountain biking around Reilly offers a diverse landscape for riders. The region features varied terrain, including areas around lakes and ponds, as well as rolling hills and woodlands. With elevations ranging up to 300 meters, the trails provide a mix of climbs and descents suitable for mountain biking.
Last updated: June 25, 2026
4.6
(8)
11
riders
31.0km
02:16
290m
290m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
5.0
(1)
8
riders
17.1km
01:15
150m
150m
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.

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9
riders
38.7km
02:44
300m
300m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
3
riders
10.9km
00:52
120m
120m
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.
5.0
(1)
3
riders
22.2km
01:45
310m
310m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
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A former castle transformed into a town hall, the Trie-Château town hall preserves a tower where Jean-Jacques Rousseau stayed. You can also admire its medieval gates and period architecture.
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After you have walked through a bit of the forest you will arrive at this. With the sun there it really is a picture!
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The Church of Saint-Jean-Baptiste is the Catholic parish church of the commune of Chaumont en Vexin. Standing on the eastern slope of the hill of the old castle, it is only accessible from the town center via an alleyway ending in stairs or from the road via a discreet sloping lane. One of the most imposing religious buildings in the French Vexin region, it dates entirely from the 16th century. Its great homogeneity of style is due to its rapid construction, as it was completed in a single phase from 1530 to 1554. The square is a peaceful spot for a break overlooking the town's rooftops.
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The parking lot is empty on weekends and free. There are quite a few places. The plus is that we are at the foot of the relief located northwest so it's cool we enter directly into our hiking tour.
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The Saint-Rémi Church is dedicated to Saint Rémi in honor of the Bishop of Reims who around 496 baptized Clovis des Francs. It was rebuilt twice, first in 1538 and then in 1562. It is distinguished by its mixture of "flamboyant Gothic" and Renaissance. The nave and the porch are the work of Nicolas le Mercier. The Saint Roch chapel at the end of the aisle was built in 1620 at the expense of Nicolas Brûlart de Sillery, Keeper of the Seals of Henri IV. This octagonal building is topped with a ten-sided stone dome. The corner shields of the octagon bear the papal coat of arms (except two with the effigies of two hearts which were added in the 19th century). Under the chapel, note the presence of a crypt which contained the tombs and the “Priants” of the Brûlart de Sillery, as for the Villeroy in Magny-en-Vexin (destroyed in 1793). It is now empty.
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The mountain bike trails around Reilly offer a good mix of difficulties. You'll find 26 easy routes, 36 moderate routes, and 2 more challenging trails, catering to various skill levels.
Yes, Reilly offers several family-friendly options. There are 26 easy routes that are generally suitable for families. A good example is the Pierre Frite Standing Stone – Lavilltertre pond loop from Loconville, which is an easy 15.1-mile trail.
The terrain around Reilly is quite varied, featuring areas around lakes and ponds, as well as rolling hills and woodlands. Elevations can reach up to 300 meters, providing a mix of climbs and descents.
Yes, many of the mountain bike routes in Reilly are designed as loops. Popular options include the Lake loop from Chaumont-en-Vexin and the Lavilltertre pond – Saint-Rémi Church loop from Liancourt-Saint-Pierre.
While exploring the trails, you can encounter several interesting landmarks. The Pierre Frite Standing Stone – Lavilltertre pond loop from Loconville passes by a notable standing stone. Other nearby attractions include Gisors Castle and Dolmen des Trois-Pierres.
The mountain bike routes in Reilly are highly regarded by the komoot community, holding an average rating of 4.6 stars from over 80 reviews. Riders often praise the varied terrain and the scenic beauty of the lakes and woodlands.
For experienced riders looking for a longer challenge, the Lake loop from Chaumont-en-Vexin is a moderate 24.0-mile trail with over 300 meters of elevation gain, offering a substantial ride.
Beginners can enjoy the Mountainbike loop from Chaumont-en-Vexin. This easy route is 12.8 miles long with about 128 meters of elevation, providing a gentle introduction to mountain biking in the area.
Yes, the Lavilltertre pond – Saint-Rémi Church loop from Liancourt-Saint-Pierre is a moderate 19.3-mile path that passes by a historic church and a pond, offering cultural interest along the ride.
The varied terrain of Reilly is generally enjoyable throughout the warmer months. Spring and autumn often provide pleasant temperatures and beautiful scenery, while summer is also suitable, especially around the lakes and ponds.
While not directly on a trail listed, the Moussy Castle – Lavilltertre pond loop from Liancourt-Saint-Pierre is a moderate 21.5-mile route that brings you close to the area where Moussy Castle is located, offering a chance to see historical architecture.


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