Lakes near Montigny-sur-l'Ain are a prominent feature of the Jura department in France, known for its diverse aquatic landscapes. The region offers a variety of lakes, including natural glacial formations and large artificial reservoirs. These bodies of water are set amidst forests and cliffs, providing settings for outdoor activities. The area is recognized for its natural beauty and historical significance, with some lake shores being UNESCO World Heritage Sites.
Last updated: October 30, 2026
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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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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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Very nice on the way back along the south of the lake
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Beautiful view of Lake Chalain (Lac de Chalain)
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It is a natural lake of glacial origin with a wild appearance. This lake will surprise you with its turquoise shores on a clear day and its cliffs in the background. It is otherwise known as Lake Ilay. With an area of 72 hectares and an average depth of ten meters, it is fed mainly by Lake Grand Maclu, to which it is connected by a small natural canal approximately 200 meters long. Possible activities: Hiking (tour of the three lakes/four lakes) and mountain biking (tour of the five lakes), horse riding, holiday activities and entertainment... Swimming is tolerated, under your own responsibility.
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Very nice view of the lake
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On the heights of the lake, the so-called belvedere of the castle offers you a wonderful view of Lake Chalain and the forests that surround it.
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There's nothing like a beach after a long, hot day of hiking. Especially since the turquoise waters of the region's lakes call for swimming. This equipped and supervised beach will allow you to cool off quietly. You will also find something to stay for the night, eat, fill your water bottles, go to the WC. A pleasant and practical beach.
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For excellent swimming, consider Lac de Clairvaux, which features a sandy beach, gently sloping shores, and holds the "Blue Flag" label for high water quality. Lac de Chalain also offers three well-equipped sandy beaches, including a dedicated swimming beach on Lake Chalain that is supervised and has facilities. Lac de Vouglans provides three lifeguard-patrolled sandy beaches at Bellecin, Mercantine, and Surchauffant during the summer.
Yes, Lac de Clairvaux is particularly family-friendly, with its safe, gently sloping sandy beach and a large, multi-level diving platform. The nearby village of Clairvaux-les-Lacs also offers amenities. Additionally, the swimming beach on Lake Chalain is equipped and supervised, making it a great option for families.
The lakes around Montigny-sur-l'Ain are known for their striking natural beauty. Lac de Chalain is famous for its unique turquoise waters, nestled amidst cliffs and forests. Lac de Vouglans boasts impressive emerald-green waters stretching 35 kilometers, surrounded by dense forests. You can also find a wilder appearance with turquoise shores and cliffs at Lac de la Motte (also known as Lac d’Ilay).
Yes, both Lac de Chalain and Lac de Clairvaux have significant historical importance. The shores of Lac de Chalain are a UNESCO World Heritage Site due to the discovery of ancient lake dwellings and tens of thousands of artifacts dating back to 5,000 BC. Similarly, archaeological sites from the Neolithic period have been found on the shores of Lac de Clairvaux, also part of a UNESCO World Heritage site.
The region offers a wide range of outdoor activities. At Lac de Chalain, you can enjoy canoeing, kayaking, sailing, hiking, and even treetop obstacle courses. Lac de Vouglans is ideal for fishing, pedal boating, paddleboarding, water skiing, and boat cruises, with over 82 km of lakeside trails for hiking, mountain biking, or e-biking. You can also find rock climbing and canyoning at the Bellecin Sports Center. For more specific routes, explore the MTB Trails around Montigny-Sur-L'Ain or Road Cycling Routes around Montigny-Sur-L'Ain.
For breathtaking panoramic views, visit the Chalain Lake Viewpoint, also known as the belvedere of the castle, which offers a wonderful perspective of Lac de Chalain and its surrounding forests. Lakeside paths around Lac de Chalain and the extensive trails around Lac de Vouglans also provide magnificent vistas.
Absolutely. Lac de Chalain has a lakeside path offering stunning views, particularly from points like the Fontenu viewpoint. Lac de Vouglans boasts over 82 km of lakeside trails suitable for hiking. You can also find hiking opportunities around Lac de la Motte, which is part of the popular 'tour of the three lakes/four lakes' routes. For more options, check out the MTB Trails around Montigny-Sur-L'Ain, which often include hiking paths.
Lac de Chalain stands out for its striking turquoise waters, often described as a "big blue lagoon," which gives it a tropical feel. It is the largest natural lake in the Jura and is of glacial origin. Beyond its beauty, its shores are a UNESCO World Heritage Site due to ancient lake dwellings and artifacts dating back to 5,000 BC, adding a rich historical dimension to its natural appeal.
Lac de Vouglans is notable as the third-largest artificial lake in France, stretching an impressive 35 kilometers. Its emerald-green waters and vast size create a significant natural playground. It features three sandy beaches, multiple harbors, and an impressive 130-meter high dam built in 1968, making it a hub for diverse water sports and extensive land-based activities.
Yes, mountain biking is a popular activity. Lac de Vouglans offers extensive lakeside trails perfect for mountain biking or e-biking. You can also find mountain biking routes around Lac de la Motte as part of the 'tour of the five lakes'. For detailed routes, explore the MTB Trails around Montigny-Sur-L'Ain, which include options like the "View of Lac de Chalain – Doucier Beach loop from Marigny".
For a more wild and natural experience, consider Lac de la Motte, also known as Lac d’Ilay. This natural lake of glacial origin has a wild appearance and can surprise you with its turquoise shores and cliffs in the background, offering a serene escape from more crowded areas.
Visitors frequently praise the stunning natural beauty, especially the turquoise waters of Lac de Chalain and the emerald hues of Lac de Vouglans. The variety of activities, from swimming and water sports to hiking and mountain biking, is also highly appreciated. Many enjoy the well-equipped beaches and the peaceful environment, with viewpoints like the Chalain Lake Viewpoint offering memorable vistas.


Still not found your perfect lake around Montigny-Sur-L'Ain? Check out the guides of these regions to see even more beautiful places.