4.5
(162)
997
riders
89
rides
Mountain biking around Lac D'Ilay offers a diverse landscape characterized by several interconnected lakes, dense forests, and rolling terrain. The region, part of the Jura mountains, features varied elevations suitable for different skill levels, with paths winding through woodlands and along lake shores. Many mountain bike trails around Lac D'Ilay provide views of the surrounding natural environment, including the notable Hérisson Waterfalls. The area is well-suited for vtt lacs exploration, with numerous routes to discover.
Last updated: June 22, 2026
4.6
(5)
15
riders
40.9km
03:22
750m
750m
Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
4.7
(3)
26
riders
Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.

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3.0
(3)
7
riders
17.4km
01:22
290m
290m
Hard mountain bike ride. Great for any fitness level. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
5.0
(1)
5
riders
54.5km
04:16
830m
840m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
5.0
(1)
5
riders
42.4km
03:24
750m
750m
Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
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Cool passage, definitely take a lamp.
0
0
A gravel, easy-to-walk hiking trail runs along the lakeshore, offering repeated, beautiful views of Lac Le Grand Maclu.
5
0
Small, rocky stretch of beach that you can climb down to, as well as good views of Lac Le Grand Maclu.
5
0
A waterfall with a larger pool and a smaller cascade in a beautiful setting. In front of it is a small stone lynx statue.
6
0
The Bief de la Ruine waterfall is located in the spectacular Malvaux Gorge. One of the most astonishing features of this waterfall is the fact that it only comes alive after heavy rainfall or during snowmelt. When it dries, it gives way to the spectacle of the carved stone, revealing the "Creux des Joyaux," a natural cave where the water swirls with varying degrees of vigor, polishing a multitude of limestone pebbles thanks to the force of its current.
7
0
Lacs de Maclu are two adjacent lakes in the western part of the French Jura, in the Jura department of Franche-Comté. They are located at an elevation of 779 m in a depression in the High Jura, in the region of the Five Lakes near Le Frasnois, about 12 km south of Champagnole. The Petit Maclu, located to the northeast, has an area of 5 hectares, a length of about 500 m, and a maximum width of about 120 m. Its greatest depth is 11 m. It lies entirely within the municipal territory of Le Frasnois.
6
0
waterfalls don't always flow
1
0
Beautiful view of the lake, and afterward, we had a lovely swim in the lake. Nice bar with delicious ice cream.
0
0
There are over 90 mountain bike trails around Lac D'Ilay, offering a wide range of options for different skill levels and preferences. The region's diverse landscape, characterized by interconnected lakes and dense forests, provides varied terrain for exploration.
Yes, Lac D'Ilay offers trails suitable for beginners. While many routes feature rolling terrain and some elevation, there are 11 trails classified as easy. These typically involve less technical sections and more gradual climbs, allowing new riders to enjoy the scenic beauty of the Jura mountains.
Experienced riders will find plenty of challenging options, with 28 trails classified as difficult. For instance, the Grand Maclu Lake – Shore of Lac de Narlay loop from La Chaux-du-Dombief is a difficult 40.3 km route with significant elevation changes. Another demanding option is the Tour des 4 lacs – The Hérisson Waterfalls loop from Le Frasnois, covering 41.7 km through varied terrain and past the notable Hérisson Waterfalls.
While specific 'family-friendly' classifications are not always explicit, routes with moderate difficulty and shorter distances are generally more suitable for families. Look for trails that stick to wider paths or forest roads, and consider the easier rated routes for a more relaxed experience with children.
Many of the mountain bike trails around Lac D'Ilay are designed as circular routes, allowing you to start and finish at the same point. Examples include the The ghost tunnel! – Shore of Lac de Narlay loop from La Chaux-du-Dombief, which offers extensive lake shore riding, and the The Hérisson Waterfalls – Fallen Tree at Lac de Bonlieu loop from Le Frasnois.
The best time for mountain biking in Lac D'Ilay is typically from spring through autumn. During these seasons, the weather is generally mild, and the trails are less likely to be affected by snow or heavy rain, providing optimal riding conditions through the forests and along the lake shores.
The trails around Lac D'Ilay offer picturesque views of the interconnected lakes, including Lac d'Ilay, Lac de Narlay, and Lac de Bonlieu. You'll also ride through dense forests and experience the rolling terrain of the Jura mountains. A highlight for many is the opportunity to see the famous Hérisson Waterfalls along certain routes.
The villages surrounding Lac D'Ilay, such as La Chaux-du-Dombief and Le Frasnois, offer a few local establishments where you can find refreshments or a meal. It's advisable to check opening times, especially outside of peak season, and consider packing snacks and water for longer rides.
Designated parking areas are typically available in the villages and at popular trailheads around the lakes, such as in La Chaux-du-Dombief or Le Frasnois. These serve as convenient starting points for many routes. Always check local signage for parking regulations.
The mountain bike trails around Lac D'Ilay are highly rated by the komoot community, with an average score of 4.5 stars from over 210 reviews. Riders often praise the beautiful natural scenery, the variety of terrain, and the well-maintained paths that wind through woodlands and along the lake shores, especially highlighting the Hérisson Waterfalls.
While many trails are well-known, the extensive network of over 90 routes means there are always less-traveled paths to discover. Exploring some of the moderate-difficulty trails that venture deeper into the forests, away from the main lake circuits, can often lead to quieter sections and unique perspectives of the Jura landscape.


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