4.2
(81)
797
riders
36
rides
Touring cycling routes around Fontenu are situated in the Jura department of Bourgogne-Franche-Comté, France, a region defined by its diverse natural landscapes. The area features the prominent Lac de Chalain, known for its turquoise waters, and the surrounding karst relief of the Jura lakes region. Cyclists can expect routes that traverse verdant forests, rolling hills, and dramatic geological formations, offering varied terrain for exploration. The network includes paths around lakes and through the low to medium mountain ranges of the…
Last updated: June 22, 2026
4.6
(24)
206
riders
30.8km
02:12
430m
430m
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
4.5
(24)
214
riders
16.9km
01:17
260m
260m
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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4.6
(5)
22
riders
33.5km
02:08
400m
400m
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(3)
33
riders
51.4km
03:53
500m
490m
Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
4.0
(2)
26
riders
21.5km
01:27
220m
220m
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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An imposing lake, of a remarkable blue!
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View of Lac de Chalain from a small hiking trail.
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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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Beautiful view of the lake, and afterward, we had a lovely swim in the lake. Nice bar with delicious ice cream.
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Easy, shaded path, perfect for cooling off in hot weather.
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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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There are over 45 touring cycling routes around Fontenu, offering a wide range of options for different skill levels. You'll find everything from easy lakeside paths to more challenging climbs through the Jura Mountains.
The terrain around Fontenu is diverse, characterized by the Jura department's natural landscapes. You can expect routes that traverse verdant forests, rolling hills, and dramatic geological formations. The area features the prominent Lac de Chalain and the characteristic karst relief of the Jura lakes region, offering varied landscapes for exploration.
Yes, Fontenu offers several easy touring cycling routes suitable for beginners and families. For example, the Lac de Chalain – Doucier Beach loop from Fontenu is a moderate 12.5 km path that provides scenic views of Lac de Chalain without major difficulties. The region's network includes paths around lakes that are generally less challenging.
The routes around Fontenu are rich in natural beauty. You can explore the stunning turquoise waters of Lac de Chalain, discover the series of 31 successive waterfalls at the Hérisson Waterfalls, or visit other beautiful lakes like Lake Narlay and Petit Maclu Lake. The area also features impressive viewpoints like the belvedere at Fontenu, offering panoramic views of Lac de Chalain.
Absolutely. From viewpoints like the belvedere at Fontenu, you can enjoy breathtaking panoramic views of Lac de Chalain and the surrounding forests. The Chalain Lake Viewpoint – View of Lake Chalain loop from Doucier is a moderate route specifically designed to take you to such scenic spots.
For experienced touring cyclists seeking a challenge, the region offers routes with significant elevation gains. The Petit Maclu Lake – Fan Waterfall loop from Marigny is a difficult 55.9 km trail with over 600 meters of elevation gain, exploring the wider lake region and passing notable waterfalls.
Yes, many touring cycling routes around Fontenu are designed as loops, allowing you to start and end at the same point. Examples include the Lac de Chalain – Chalain loop from Doucier and the Champagnole – Doucier Beach loop from Doucier, both offering varied landscapes and scenic views.
The Jura region, including Fontenu, is generally best for touring cycling from spring through autumn. During these seasons, the weather is pleasant, and the natural landscapes are at their most vibrant. While some routes might be accessible in winter, many paths could be affected by snow or ice, especially at higher elevations.
Yes, parking is generally available in and around the villages that serve as starting points for many routes, such as Fontenu itself or nearby Doucier. It's advisable to check specific starting points for designated parking areas, especially during peak season.
While Fontenu is a smaller commune, public transport options in the wider Jura region can connect you to some areas. However, for direct access to specific trailheads, especially those in more remote natural areas, personal transport or a combination of public transport and cycling is often the most practical solution.
The area is highly rated by the komoot community, with an average score of 4.3 stars from over 140 reviews. Reviewers often praise the stunning views of Lac de Chalain, the diverse natural landscapes including forests and waterfalls, and the variety of routes catering to different fitness levels. Many appreciate the peacefulness and beauty of the Jura region.
Yes, Fontenu is home to prehistoric pile-dwelling (or stilt house) settlements, which are recognized as a UNESCO World Heritage Site. These sites offer a fascinating glimpse into ancient history and can be an interesting cultural stop during your cycling tour.


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