The lake occupies a depression formed during the Würm glaciation period.
Archaeological excavations at the site revealed the existence of Neolithic lakeside dwellings, some of which are UNESCO World Heritage listed as part of the Prehistoric Pile Dwellings around the Alps.
The water temperature in the lake typically ranges between 19°C and 24°C during the peak summer months.
The site acts as a major hub for the local 'Lakes District' of the Jura, comprising one of the most significant natural water bodies in the department.
Lake Clairvaux, officially known as Lac de Clairvaux, is a glacial lake located in the Jura region of eastern France. It is divided into two distinct basins: a larger southern basin primarily used for swimming and leisure, and a smaller northern basin. The site features a sandy public beach with a gentle slope into the water, making it suitable for families. The surrounding landscape consists of forested hills and limestone cliffs characteristic of the Jura Mountains. The lake is fed by underground springs and the Doye stream. It is a designated Blue Flag site, indicating high water quality and environmental management standards. Visitors can access various amenities including boat rentals and designated picnic areas.
The wooden jetty on the southern shore providing a wide-angle view of the lake against the backdrop of the Jura hills.
Bring water shoes to navigate the transition from sand to pebbles at the shoreline.
Arrive early during July and August to secure parking near the main beach entrance.
Explore the walking trails that circle the lake to access less-crowded observation points.
Do not attempt to swim in the restricted zones of the northern basin, which is designated for nature conservation.
Beach facilities and lifeguard supervision are operational only during the summer season.
Maintain noise levels in designated quiet zones near the nature reserve areas; dispose of all waste in provided containers to protect the ecosystem.
