4.7
(124)
3,023
riders
75
rides
Road cycling around Lac de Bonlieu offers diverse terrain within the Jura Mountains, characterized by glacial lakes, dense forests, and rocky ridges. The region, part of the "Pays des Lacs," features a landscape sculpted by ancient glaciers, providing varied elevation changes suitable for road cyclists. Routes often traverse mostly paved surfaces, winding through the Haut-Jura forests and moors. This area provides a mix of challenging climbs and scenic stretches, with elevation gains ranging from moderate to significant.
Last updated: July 15, 2026
15
riders
21.9km
01:12
350m
350m
Hard road ride. Good fitness required. You may need to push your bike for some segments of this route.
15
riders
29.0km
01:36
440m
440m
Hard road ride. Good fitness required. You may need to push your bike for some segments of this route.

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5.0
(2)
15
riders
22.7km
01:09
290m
290m
Hard road ride. Great for any fitness level. You may need to push your bike for some segments of this route.
10
riders
27.7km
01:28
420m
420m
Hard road ride. Good fitness required. You may need to push your bike for some segments of this route.
9
riders
28.5km
01:24
430m
430m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
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The smaller of the two Maclu Lakes, with an easy hiking trail along its shore.
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Good spot to start Pic de l'Aigle walk
1
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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.
6
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Climbed it today (17-8-25); it's open, and there are signs along the road showing your progress. Traffic is quiet, and a beautiful green climb, especially further on.
0
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It is not a Linden but a Sequoia.
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Easy, shaded path, perfect for cooling off in hot weather.
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Classified as 3rd category, the Col de la Joux was crossed during the 8th stage of the 2017 Tour De France!
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On most maps it is called "Lac d’Ilay". The other name probably comes from the small island "Île de la Motte" which is located in the lake.
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The region around Lac de Bonlieu, part of the "Pays des Lacs" in the Jura Mountains, offers diverse terrain shaped by ancient glaciers. You'll find a mix of challenging climbs and scenic stretches, with routes winding through dense Haut-Jura forests, past glacial lakes, and along rocky ridges. Most routes feature mostly paved surfaces, ideal for road cycling.
Yes, Lac de Bonlieu offers options for various ability levels. While many routes involve significant elevation, there are 4 routes categorized as easy. These typically feature minimal elevation gain and shorter distances, allowing for a more relaxed experience through the scenic landscape.
Road cycling routes around Lac de Bonlieu are rich with natural beauty. You can expect magnificent panoramic viewpoints, such as the Belvédère de la Ronde, offering sweeping views of the lake and surrounding forest. Many routes also pass by several of the region's distinctive glacial lakes, and some even offer views of the Hérisson river, known for its spectacular waterfalls.
Route durations vary significantly based on distance and elevation. For example, the difficult route Lac du Petit Maclu – Lac de Narlay loop from Bonlieu, covering 21.8 km, typically takes around 1 hour 11 minutes. Longer, more challenging routes can take over 5 hours, while easier rides might be completed in under 2 hours.
Yes, the region is known for its natural water features. The Hérisson river, famous for its spectacular waterfalls, originates near Lac de Bonlieu. You can explore routes like View of Lac de Narlay – Saut Girard Waterfall loop from Bonlieu, which specifically includes a waterfall in its name, offering a chance to see these natural wonders.
The Jura Mountains, where Lac de Bonlieu is located, offer pleasant conditions for road cycling during the warmer months. Spring and autumn provide comfortable temperatures and beautiful scenery, while summer allows for longer daylight hours. It's always advisable to check local weather conditions before heading out, especially given the varied elevation.
Yes, many of the road cycling routes around Lac de Bonlieu are designed as loops, allowing you to start and end at the same point. Examples include the popular View of Lac de Narlay – Chalain Lake spot loop from Bonlieu and the Col de la Joux loop from Bonlieu, providing convenient options for exploration.
The road cycling routes around Lac de Bonlieu are highly rated by the komoot community, with an average score of 4.7 stars from over 120 reviews. Cyclists often praise the stunning natural beauty, the variety of terrain, and the well-maintained paved surfaces that make for an enjoyable ride through the glacial lake region and Haut-Jura forests.
Absolutely. The "Pays des Lacs" lives up to its name. Routes like View of Lac de Narlay – Chalain Lake spot loop from Bonlieu and Lac du Petit Maclu – Lac de Narlay loop from Bonlieu are specifically designed to showcase several of the region's beautiful glacial lakes, offering diverse aquatic scenery.
The elevation gain varies significantly, reflecting the diverse terrain of the Jura Mountains. While some easier routes have minimal climbing, many routes feature moderate to significant elevation. For instance, the View of Lac de Narlay – Chalain Lake spot loop from Bonlieu has an elevation gain of approximately 530 meters, and other difficult routes can exceed 700 meters of climbing.
Yes, the region is well-suited for outdoor activities, and picnic areas are available. Many routes wind through scenic spots where you can take a break and enjoy the natural surroundings, particularly near the lakes or within the forest sections.
There are over 80 road cycling routes available around Lac de Bonlieu, offering a wide range of options for different skill levels and preferences. This extensive network ensures there's always a new path to explore.


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