Lac de Bonnal

Lac de Bonnal is a cluster of five bodies of water in the commune of Chassey-lès-Montbozon, in the Haute-Saône department, part of the Bourgogne-Franche-Comté region of eastern France. Rather than a single natural lake, it forms a large recreational estate along the Ognon river, spread over roughly 150 hectares of woodland and open water, and is often referred to locally as the Domaine du Val de Bonnal.

Where exactly is it?

The site sits between the towns of Rougemont and Villersexel, in the north-eastern corner of Haute-Saône, close to the border with the Doubs department. Its coordinates are approximately 47.52°N, 6.37°E. The surrounding landscape is quiet farming and forest country, reached by minor roads rather than a motorway, which gives the area a genuinely rural feel far from any large city.

What can you do on the water?

Of the five bodies of water, one is set aside purely for swimming. Through the summer season — typically July and August — the beach is watched over by lifeguards, making it a reassuring option for families. Pedal boats, canoes and paddleboards can be hired on site, usually charged by the half hour. Away from the water, there are courts for beach volleyball and pétanque, plus a walking path of several kilometres that loops around the lakes — a pleasant way to close out a day spent by the water.

Is fishing allowed?

Yes. Two of the five lakes, similar in size to one another, are reserved specifically for anglers. This is also where the annual "24 Hours of Fishing at Bonnal" takes place, an event that draws fishing enthusiasts from across the wider region. The remaining bodies of water are mostly given over to leisure use or sit alongside the estate's overnight cabins.

Can you stay overnight?

Part of the estate around the lakes is occupied by wooden cabins belonging to a nature-lodge operator, with views over the water and surrounding forest. This suits visitors who want more than a day trip — waking up beside the lake rather than simply passing through for an afternoon swim.

When is the best time to visit?

The supervised swimming season runs through the summer holidays. Outside that window, the site still works well for walking, fishing or simply relaxing outdoors, though without a lifeguard on the beach. Entry to the grounds typically carries a small admission fee, with young children let in free, and it's worth checking opening hours before setting off since they shift with the season.

Frequently asked questions

Is Lac de Bonnal a single lake? No — it's a group of five bodies of water within the roughly 150-hectare Domaine du Val de Bonnal estate.

Can you swim there? Yes, one of the lakes has a sandy beach with lifeguard supervision during the summer season.

Is there fishing? Yes, two of the lakes are dedicated to fishing, and the site hosts an annual round-the-clock fishing competition.

Where precisely is it located? In the commune of Chassey-lès-Montbozon, Haute-Saône department, between the towns of Rougemont and Villersexel.

Can you stay overnight on site? Yes, wooden cabins overlooking the lakes and forest are available to rent.