4.4
(3885)
30,083
hikers
14
hikes
Bus station hiking trails around Lac D'Ilay are situated in the Jura Mountains, an area defined by glacial lakes, imposing cliffs, and extensive forests. The region encompasses the "4 Lakes" area, featuring Lac d'Ilay, Lac de Narlay, Lac du Petit Maclu, and Lac du Grand Maclu, known for their distinct turquoise waters. Hikers can explore diverse landscapes, from accessible lakeside paths to routes ascending to viewpoints like Pic de l'Aigle, which provides panoramic vistas. The trails also navigate through ecologically…
Last updated: May 10, 2026
4.7
(3)
53
hikers
2.90km
00:50
80m
80m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
4.9
(8)
135
hikers
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

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4.0
(1)
3
hikers
11.0km
03:04
200m
200m
Moderate hike. Good fitness required. Mostly accessible paths. Sure-footedness required.
4.8
(14)
69
hikers
6.94km
02:19
230m
230m
Hard hike. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
5.0
(1)
10
hikers
6.91km
01:59
150m
150m
Moderate hike. Great for any fitness level. Mostly accessible paths. Sure-footedness required.
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Beautiful view near a crossroads of a small waterfall with cascades.
7
0
A beautifully situated small waterfall with a small pool. From the rocks in front of the waterfall, you can enjoy beautiful views of the idyllic natural setting.
7
0
Path along the Le Hérisson stream with several smaller cascades.
7
0
Metal footbridge over the Le Hérisson stream with beautiful views of the water.
7
0
View of the Cascade de L'Eventail. A small, rocky path leads directly to the waterfall.
7
0
Beautiful view of the central waterfall Cascade Du Hérisson with several cascades.
7
0
Good spot to start Pic de l'Aigle walk
1
0
Great view point of the Quatre lacs. Nice hike from Pic de l'Aigle or directly from the car park
0
0
There are over a dozen hiking trails around Lac d'Ilay that are accessible from bus stations, offering a variety of distances and difficulties to explore the stunning Jura landscape.
Yes, there are several easy routes perfect for beginners or families. For instance, the Pic de l'Aigle – The four lakes loop from La Chaux-du-Dombief is an easy 2.9 km trail that offers beautiful views without significant elevation gain. The region's glacial lakes provide accessible lakeside scenery for gentle strolls.
Yes, dogs are generally welcome on the trails around Lac d'Ilay. However, it is crucial to keep them on a leash to protect the local wildlife and respect the tranquility zones, especially during animal breeding seasons. The area is a Natura 2000 and Ramsar site, highlighting its ecological importance.
Absolutely. The picturesque Rivière du Hérisson flows from Lac d'Ilay, and its waterfalls are a major attraction. You can experience them on routes like the Fan Waterfall – Le Grand Saut loop from Bonlieu, which is a more challenging hike but rewards you with stunning cascades.
The hikes offer diverse and breathtaking views. You'll encounter the striking turquoise waters of the glacial lakes, dramatic cliffs, and extensive forests. The Pic de l'Aigle, for example, provides panoramic 360-degree views over the Jura Mountains, the Hérisson Valley, and even Mont Blanc on a clear day. Routes like the Four Lakes Viewpoint – Stone formation loop from La Chaux-du-Dombief specifically highlight these scenic vistas.
Yes, many of the bus-accessible trails are circular, allowing you to start and end at the same point. Examples include the Pic de l'Aigle – The four lakes loop from La Chaux-du-Dombief and the Belvédère de la Dame Blanche – White Lady viewpoint loop from Bonlieu, making logistics straightforward when relying on public transport.
The region is beautiful year-round, but spring and autumn offer particularly pleasant hiking conditions with vibrant foliage or blooming wildflowers. Summer is also popular, though trails can be busier. Always check local weather conditions before heading out.
The Lac d'Ilay area is unique due to its stunning glacial landscapes, featuring a chain of four interconnected lakes with striking turquoise waters. The presence of dramatic cliffs, extensive forests, and delicate peat bogs creates a diverse and enchanting environment, recognized for its ecological importance as a Natura 2000 and Ramsar site.
The area is highly rated by the komoot community, with an average score of 4.5 stars from over 4,000 ratings. Reviewers often praise the stunning natural beauty, the variety of trails catering to different abilities, and the panoramic views, especially from viewpoints like Pic de l'Aigle.
Certainly. Many routes fall into the moderate category, offering a good balance of distance and elevation. The Four Lakes Viewpoint – Stone formation loop from La Chaux-du-Dombief, at 11 km, provides a substantial hike with rewarding views. Another excellent option is the Altar stone – Lake Bonlieu loop from Bonlieu, which is around 9 km.
To protect the fragile ecosystem and preserve the natural environment, swimming and boating are generally prohibited in Lac d'Ilay and the other three lakes. The focus in this pristine area is on hiking, mountain biking, and appreciating the natural beauty from the shore.


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