4.7
(19)
63
riders
14
rides
Gravel biking around Lac Le Grand Maclu offers diverse terrain across a landscape characterized by glacial lakes, dense forests, and significant peat bogs. The region features varied surfaces including forest lanes, stony paths, and farm tracks, providing a dynamic riding experience. Limestone cliffs and unique geological formations are present, alongside alpine meadows and panoramic viewpoints. This area provides a network of gravel bike trails suitable for different skill levels.
Last updated: July 3, 2026
4.2
(6)
7
riders
10.6km
00:35
100m
100m
Easy gravel ride. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels.
5.0
(2)
21
riders
22.6km
01:31
330m
330m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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4.3
(7)
14
riders
12.1km
00:39
120m
120m
Easy gravel ride. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels.
5.0
(3)
12
riders
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5
riders
66.3km
04:35
1,120m
1,120m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Cool passage, definitely take a lamp.
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Small, rocky stretch of beach that you can climb down to, as well as good views of Lac Le Grand Maclu.
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Boat mooring with wooden dock for fishing boats at Lac de Narlay.
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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.
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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.
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waterfalls don't always flow
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The region offers a varied gravel biking experience, with trails utilizing forest lanes, stony paths, farm tracks, and greenways. You'll encounter diverse landscapes including dense forests, alpine meadows, and sections around significant peat bogs and limestone formations. The routes combine the speed of a road bike with the off-road capability needed for these varied surfaces.
There are over 20 gravel bike trails mapped around Lac Le Grand Maclu, catering to a range of skill levels. This includes 2 easy routes, 5 moderate routes, and 14 more challenging options for experienced riders.
Yes, there are easy routes suitable for families. For instance, the Grand Maclu Lake – Shore of Lac de Narlay loop from Le Frasnois is an easy 10.6 km trail that navigates between two of the region's prominent glacial lakes, perfect for a less strenuous outing.
The area is rich in natural beauty. You can expect stunning views of the glacial lakes (Grand Maclu, Petit Maclu, Ilay, and Narlay), often referred to as 'Little Scotland'. Notable viewpoints include the Pic de l'Aigle, offering a spectacular 360° panorama, and the Belvédère des 4 Lacs. The region also features impressive limestone cliffs and diverse wetlands, including significant peat bogs that are Natura 2000 and Ramsar sites.
While the Cascades du Hérisson are a prominent natural attraction in the area, they are primarily known for hiking trails. Some gravel routes may pass near access points, but the waterfalls themselves are typically explored on foot. The region's diverse landscapes, including glacial lakes and forests, offer plenty of other scenic highlights for gravel bikers.
The routes vary significantly in difficulty. You'll find easy loops, such as the Grand Maclu Lake – Shore of Lac de Narlay loop from Le Frasnois, which are suitable for beginners. There are also moderate options like the Shore of Lac de Narlay – Grand Maclu Lake loop from La Chaux-du-Dombief, and many difficult routes with significant elevation gains, some exceeding 1,000 meters, catering to experienced riders seeking a challenge.
Yes, for experienced riders seeking a challenge, routes like the Chapelle-des-Bois – Chapelle-des-Bois loop from Gare de Saint-Laurent-en-Grandvaux offer a substantial ride of over 74 km with significant elevation gain. Another challenging option is the Shore of Lac de Narlay – View of Lac de Narlay loop from La Chaux-du-Dombief, which is nearly 39 km long and leads through forested areas with lake views.
The gravel biking routes around Lac Le Grand Maclu are highly regarded by the komoot community, with an average rating of 4.7 stars from over 20 reviews. Riders often praise the diverse terrain, the stunning glacial lake scenery, and the well-maintained paths that offer a dynamic riding experience.
Yes, many of the gravel bike routes in the Lac Le Grand Maclu area are designed as loops, 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-des-Crotenay, which offers a unique historical element along its 37.6 km path, and the various loops around the 'Four Lakes'.
The region's natural environment, with its forests, lakes, and varied trails, can be enjoyable for biking with dogs. However, it's essential to keep dogs under control, especially in areas with wildlife or near livestock. Always check local regulations regarding dogs on trails and ensure your dog is fit enough for the chosen route and conditions.
Parking is generally available at various starting points for the trails, particularly in and around the villages near the lakes, such as Le Frasnois or La Chaux-du-Dombief. Specific parking information can often be found on individual route pages or local tourism websites.
Generally, no specific permits are required for gravel cycling on public trails in the Lac Le Grand Maclu region. However, it's always advisable to respect private property, stay on marked trails, and be mindful of any local signage, especially within protected natural areas like the Natura 2000 sites.


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