4.7
(59)
1,416
runners
19
runs
Jogging around Le Frasnois offers diverse running experiences through the Jura Mountains. The region is characterized by a series of waterfalls, including the Hérisson Waterfalls, and several picturesque lakes such as Lac d'Ilay and Lac de Narlay. Runners can explore varied terrain, from mid-mountain paths to unique peat bogs and deep gorges.
Last updated: May 9, 2026
5.0
(1)
103
runners
12.0km
01:22
160m
160m
Hard run. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
113
runners
25.3km
03:12
610m
610m
Hard run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.

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5.0
(1)
69
runners
3.86km
00:25
50m
50m
Easy run. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels.
70
runners
8.70km
00:57
60m
60m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(1)
61
runners
5.06km
00:33
60m
60m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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🌿 Lake Narlay: Essential Information Location: Frasnois municipality, in the Lakes Region (Jura). Altitude: 748 m. Surface area: 41 ha. Depth: Up to 40 m, making it the deepest lake in the Jura. Origin: Glacial lake, likely formed by a rockfall. Environment: Meadows, forests, peat bogs, Natura 2000 and Ramsar sites. (Copilot)
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The smaller of the two Maclu Lakes, with an easy hiking trail along its shore.
5
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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.
5
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Water access with beautiful views of Lac Le Grand Maclu.
4
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Beautiful view through a clearing onto Lac Le Grand Maclu.
5
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View of Lac du Narlay from the edge of the forest.
6
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Beautiful view of Lac de Narlay from the hiking trail.
6
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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
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Le Frasnois offers a wide selection of running routes, with over 20 trails available for you to explore. These routes cater to various fitness levels, from easy lakeside paths to more challenging mid-mountain terrain.
The running trails in Le Frasnois are incredibly diverse. You'll find everything from paths alongside serene lakes like Lac d'Ilay and Lac de Narlay, to trails that wind through the dramatic Hérisson Waterfalls. The region also features mid-mountain terrain, deep gorges, and even unique peat bogs, offering varied gradients and technical sections.
Yes, Le Frasnois has routes suitable for beginners. There is at least one easy route, such as the Around Lake Narlay – Lake Narlay Loop loop from Le Frasnois, which is a shorter trail leading through a serene lakeside environment, perfect for a gentle jog.
The running routes in Le Frasnois are highly regarded by the komoot community, boasting an average rating of 4.7 stars from over 60 reviews. Runners frequently praise the stunning natural beauty, the variety of terrain, and the well-marked paths that make exploring the Jura Mountains a fantastic experience.
Absolutely! The Hérisson Waterfalls are a major highlight of the region. While specific routes are not listed here, you can find paths that run alongside this spectacular series of seven waterfalls, including the impressive Le Grand Saut and Saut Girard Waterfall, offering breathtaking views during your run.
Yes, the Four Lakes area is perfect for scenic runs. You can enjoy routes around the turquoise waters of Lac d'Ilay, Lac du Petit Maclu, Lac du Grand Maclu, and Lac de Narlay. A great option is the Petit Maclu Lake – Lake Ilay loop from Le Frasnois, which offers beautiful views of two of these picturesque lakes.
For breathtaking panoramic views, consider routes that ascend to higher points. The Four Lakes Viewpoint – Three Lakes Viewpoint loop from Le Frasnois is a challenging route that provides expansive vistas across the lake district and surrounding hills. You might also find routes near Pic de l'Aigle for stunning regional views.
Beyond the lakes and waterfalls, Le Frasnois offers unique natural experiences. You can explore the deep, narrow Langouette Gorges, which are equipped with footbridges for safe passage. Additionally, the nearby Peat Bogs of Frasne present a rare ecosystem with landscapes reminiscent of the tundra, accessible via wooden walkways.
Many of the running routes in Le Frasnois are designed as loops, allowing you to start and finish in the same location. Examples include the Petit Maclu Lake – Lake Ilay loop from Le Frasnois and the Around Lake Narlay – Lake Narlay Loop loop from Le Frasnois, providing convenient options for your run.
Le Frasnois offers a range of trails, some of which are suitable for families looking for a gentle jog or walk. Easier, flatter routes around the lakes, such as the Lake Ilay – Petit Maclu Lake loop from Le Frasnois, are often a good choice for families, though always check the route details for specific difficulty and terrain.
Many trails in the Jura Mountains are dog-friendly, but it's always best to check specific route regulations or local signage. Generally, well-behaved dogs on a leash are welcome on natural paths. Be mindful of wildlife and other trail users, especially in popular areas like the Hérisson Waterfalls or around the lakes.
The Jura Mountains are beautiful year-round, but late spring through early autumn (May to October) generally offers the most pleasant conditions for running in Le Frasnois. During these months, the weather is milder, and the natural landscapes are at their most vibrant, with lush greenery and flowing waterfalls. Winter running is possible but may require appropriate gear for snow and ice.
Yes, experienced runners will find challenging options in Le Frasnois. For example, the Four Lakes Viewpoint – Three Lakes Viewpoint loop from Le Frasnois is a difficult 15.7-mile (25.4 km) path with significant elevation gain, perfect for those seeking a longer and more demanding run.


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