Lakes around Denezières are situated in the Jura department of eastern France, serving as a base for exploring the region's natural lakes. The area is known for its diverse and picturesque aquatic landscapes, particularly the "Four Lakes" region. These lakes are often of glacial origin and are part of protected Natura 2000 sites. Denezières provides access to these natural features, which include significant wetlands and panoramic viewpoints.
Last updated: May 11, 2026
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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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Small, rocky stretch of beach that you can climb down to, as well as good views of Lac Le Grand Maclu.
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Lac d'Ilay, also called Lac de la Motte, is a lake in the Jura department of France, about 14 km south of Champagnole in Franche-Comté. It lies at an altitude of 774 m in the municipalities of Le Frasnois and La Chaux-du-Dombief and covers an area of approximately 0.7 km². The lake is 1.9 km long, has a maximum width of 400 m, and has a small island (Île de la Motte). Its greatest depth is 32 m.
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Lac de Narlay is a lake in the Jura department of France, about 10 km south of Champagnole in Franche-Comté. It lies at an altitude of 748 m in the municipality of Le Frasnois and covers an area of approximately 0.4 km². The lake is 950 m long and 625 m wide. Its maximum depth is 40 m.
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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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Easy, shaded path, perfect for cooling off in hot weather.
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Easy path to walk in the shade, very welcome in case of strong heat.
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The lakes around Denezières are primarily of glacial origin, forming a picturesque landscape within the Jura department. They are known for their diverse aquatic environments, including significant wetlands, and are often part of protected Natura 2000 sites. The 'Four Lakes' area, comprising Lac d'Ilay, Lac de Narlay, Petit Maclu Lake, and Grand Maclu Lake, is particularly renowned for its stunning scenery and ecological importance.
Yes, the region offers breathtaking panoramic viewpoints. The Belvédère des Quatre Lacs, located 900 meters above sea level, provides a stunning 360-degree view of Lac d'Ilay, Lac de Narlay, Petit Maclu Lake, and Grand Maclu Lake. Another excellent spot is the Three Lakes Viewpoint, which offers a unique perspective on three of these lakes, notable for their whitish rim caused by chalk mud.
Swimming is permitted in several lakes around Denezières. Lake Narlay is a popular choice where swimming is allowed. While boating is prohibited in Lake Ilay to protect its environment, swimming is generally permitted at your own risk. Always check local regulations and safety guidelines before entering the water.
Many of the lakes offer family-friendly activities. For instance, Petit Maclu Lake is located within a Natura 2000 area and features easy, shaded paths, perfect for walks with children. Lake Ilay also offers an easy walk around its perimeter, suitable for families.
The lakes, especially those within Natura 2000 areas like Petit Maclu Lake and Grand Maclu Lake, are rich in biodiversity. You can observe diverse flora such as water lilies, reeds, and sedges in the wetlands. These areas also provide exceptional habitats for various animal species, including dragonflies and the Eurasian coot.
Yes, Lac d'Ilay, also known as Lac de la Motte, features an island called Île de la Motte. This island has a rich history, with evidence of human occupation dating back to the Neolithic period and the remains of a monastery from around the year 1000, adding a cultural dimension to its natural charm.
The area around Denezières offers a variety of outdoor activities. You can find numerous routes for running, mountain hiking, and gravel biking. For example, there are challenging running trails like the 'Chalain Lake Viewpoint – Fan Waterfall loop' and scenic gravel biking routes such as the 'View of Lac de Narlay – Shore of Lac de Narlay loop'. You can explore more options in the Running Trails around Denezières, Mountain Hikes around Denezières, and Gravel biking around Denezières guides.
The lakes offer beauty throughout the year, with the hues of the glacial lakes shifting between jade, sapphire, turquoise, and khaki depending on the day and season. Summer is ideal for swimming and enjoying the warmer weather, while spring and autumn provide pleasant temperatures for hiking and observing nature's changing colors. Winter can offer a serene, snow-covered landscape for those interested in cold-weather activities.
Visitors particularly appreciate the stunning views, especially from spots like the Three Lakes Viewpoint. The tranquil settings, opportunities for easy walks around lakes like Lake Ilay, and the refreshing experience of swimming in lakes such as Lake Narlay are frequently highlighted. The rich natural environment and the chance to observe diverse flora and fauna also contribute to a memorable experience.
Yes, as many of these lakes are protected natural areas, it's important to respect the environment. Visitors are encouraged to stay on marked footpaths, keep pets on leads, dispose of waste properly, and avoid making excessive noise, especially during sensitive periods for wildlife. Camping and fires are generally prohibited in the Four Lakes area to preserve its pristine condition.
While many lakes offer walking paths, the accessibility and length vary. For example, Lake Narlay has a charming path that encircles it, winding through forests and meadows. The 'Tour of the Four Lakes' hiking trail provides accessible paths connecting Petit Maclu Lake and Grand Maclu Lake, allowing walkers to enjoy the preserved natural surroundings.


Still not found your perfect lake around Denezières? Check out the guides of these regions to see even more beautiful places.