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Running Trails
France
Bourgogne-Franche-Comté
Saint-Claude

Lac D'Ilay

The best running trails around Lac D'Ilay

4.8

(48)

2,764

runners

136

runs

Jogging around Lac d'Ilay offers routes through a landscape shaped by glacial activity, featuring clear turquoise waters and imposing cliffs. The region is part of a larger "land of lakes" in the Jura, connected by natural canals and flowing into the Rivière du Hérisson. Trails often traverse protected natural environments, including Natura 2000 and Ramsar sites, highlighting rich biodiversity. The area's topography includes hills like the Pic de l'Aigle, providing elevated viewpoints over valleys.

Best jogging routes around Lac D'Ilay

Last updated: July 6, 2026

4.5

(2)

94

runners

#1.

Fan Waterfall – Le Grand Saut loop from La Chaux-du-Dombief

12.0km

01:34

350m

350m

Hard run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.

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Hard

Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Moderate
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Hard run. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required.

Hard

11

runners

Moderate run. Good fitness required. Mostly accessible paths. Some sure footedness required.

Moderate

Moderate run. Good fitness required. Mostly accessible paths. Some sure footedness required.

Moderate
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Popular around Lac D'Ilay

Hiking around Lac D'Ilay

Road Cycling Routes around Lac D'Ilay

MTB Trails around Lac D'Ilay

Cycling around Lac D'Ilay

Gravel biking around Lac D'Ilay

Mountain Hikes around Lac D'Ilay

Tips from the Community

Anne Dassonville
November 11, 2025, Cascades du Hérisson

A superb hike with beautiful views of the seven waterfalls. It's quite crowded, so for a quieter return, you can take the GR 559 forest path back, which doesn't follow the water but is also magnificent in autumn!

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0

0

Kristian
September 1, 2025, Petit Lac Maclu

The smaller of the two Maclu Lakes, with an easy hiking trail along its shore.

Translated by Google

5

0

Kristian
September 1, 2025, Lac du Grand Maclu

Small, rocky stretch of beach that you can climb down to, as well as good views of Lac Le Grand Maclu.

Translated by Google

5

0

Kristian
September 1, 2025, Coin du grand Maclu

Water access with beautiful views of Lac Le Grand Maclu.

Translated by Google

4

0

Small, privately owned botanical garden that can be visited by appointment.

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5

0

Waterfall at the ruins of a former mill.

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7

0

Kristian
August 31, 2025, Saut de la Forge

Larger waterfall Cascade Saut De La Forge with grotto and views directly onto the waterfall, as well as from above onto the water cascading down over smaller cascades.

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7

0

Kristian
August 31, 2025, Château Garnier

Beautiful view near a crossroads of a small waterfall with cascades.

Translated by Google

7

0

Frequently Asked Questions

How many running routes are available around Lac d'Ilay?

The Lac d'Ilay area offers a wide selection of running routes, with over 140 trails to explore. These range from easy lakeside loops to more challenging climbs, catering to various fitness levels.

Are there any easy or beginner-friendly jogging paths around Lac d'Ilay?

Yes, there are several easily accessible paths perfect for beginners or a relaxed jog. For instance, the Lake Ilay loop from Le Frasnois is a moderate 5.6 km route that offers a scenic run around the lake with minimal elevation gain.

What kind of terrain can I expect on the running trails in the Lac d'Ilay region?

The terrain around Lac d'Ilay is diverse, shaped by glacial activity. You'll find a mix of forest paths, lakeside trails with clear turquoise waters, and some routes with more significant elevation changes leading to panoramic viewpoints. Trails range from smooth, easily accessible sections to more rugged paths, especially on routes climbing towards areas like the Pic de l'Aigle.

Are there any circular running routes in the area?

Absolutely. Many of the running routes around Lac d'Ilay are circular, allowing you to start and finish at the same point. A popular option is the Grand Maclu Lake – Petit Maclu Lake loop from La Chaux-du-Dombief, a moderate 9.3 km route that connects two of the region's beautiful lakes.

Can I bring my dog on the jogging trails around Lac d'Ilay?

Yes, dogs are generally welcome on the trails around Lac d'Ilay. However, to protect the rich biodiversity of this Natura 2000 and Ramsar site, it's essential to keep dogs on a lead at all times and stay on marked footpaths. This helps preserve the natural environment and wildlife.

Are there any family-friendly running routes suitable for children?

Many of the less strenuous lakeside loops are suitable for families. While specific 'family versions' are mentioned for hiking, routes with lower difficulty and shorter distances, such as parts of the lake loops, can be enjoyed by families jogging together. Always check the route details for distance and elevation to ensure it matches your family's ability.

What natural features or viewpoints can I see while running in Lac d'Ilay?

The region is rich in natural beauty. You'll encounter the stunning turquoise waters of Lac d'Ilay and its neighboring glacial lakes, impressive cliffs, and the unique island 'motte' in Lac d'Ilay. For panoramic views, routes like the Pic de l'Aigle – Three Lakes Viewpoint loop from La Chaux-du-Dombief offer magnificent vistas over the Hérisson and Grandvaux Valleys, and even Mont Blanc on clear days.

Is there parking available near the jogging trails?

Yes, parking is generally available at common starting points for trails around Lac d'Ilay, such as near La Chaux-du-Dombief or Le Frasnois. These spots provide convenient access to the various lake loops and other routes in the area.

What is the best time of year to go running around Lac d'Ilay?

The spring, summer, and early autumn months are ideal for running around Lac d'Ilay, offering pleasant temperatures and lush scenery. From April 15 to September 15, a voluntary tranquility zone is established to protect wildlife, ensuring a peaceful environment for your run. While winter running is possible, be prepared for colder conditions and potentially icy or snowy trails.

Are there any cafes or places to get refreshments near the running routes?

While the focus is on natural preservation, you can find cafes and small eateries in nearby villages such as La Chaux-du-Dombief or Le Frasnois, which are common starting points for many routes. These provide opportunities for refreshments before or after your run.

What do other runners enjoy most about the trails in Lac d'Ilay?

The running routes in Lac d'Ilay are highly rated by the komoot community, with an average score of 4.8 stars. Reviewers often praise the peaceful ambiance, the breathtaking turquoise waters, the backdrop of imposing cliffs, and the well-maintained network of paths that make each run a refreshing experience amidst stunning natural beauty.

Are there any routes that pass by waterfalls?

Yes, for those who enjoy the sound and sight of waterfalls, the region offers routes that incorporate these natural wonders. The The Hérisson Waterfalls – Garnier Castle loop from La Chaux-du-Dombief is a challenging 4.1 km path that features varied terrain near the picturesque Hérisson waterfalls, providing a dynamic and scenic running experience.

Most popular routes around Lac D'Ilay

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