Wam Park Rambouillet in Yvelines is closing for good.

The Wam Park Rambouillet venture ended after just one season. The company, which became the private delegate of the Étangs de Hollande leisure base in 2025, terminated its contract with the Rambouillet Territoires, the owner of the site at Les Bréviaires in the heart of the Rambouillet Forest in the Yvelines (78). So long to the water park, its inflatable Water Games courses, and the free swimming slated for summer 2026. The ban­ked ski lift announced for this year will not go ahead either.

Why did Wam Park leave the Étangs de Hollande recreation area?

Looking back. In 2025, the company Wam Park, already running eight parks including the Fontainebleau site referenced here Fontainebleau, signed a 25-year occupancy agreement with Rambouillet Territoires, then chaired by Thomas Gourlan. The site had been revamped, with free entry, supervised swimming, inflatable water courses, pedal boats and stand-up paddles. Just one season later, the operator invoked a clause allowing it to withdraw after the first year. Its founder, Romain Llobet, spoke of an “incompatibilité politique” with the former executive of the community and denounced closures that he deemed abusive during the summer of 2025.

The numbers summed up the rift: the leisure center opened only 45 days out of the 70 available that year. Two weeks of closure stemmed from the recurring problem of cyanobacteria, which regularly render the water unfit for swimming. But the main flashpoint concerned an accident in June 2025 and the ensuing administrative investigation, a spark that has kept tensions between the operator and the metropolitan area simmering.

• To be read
• Where to swim in Yvelines this summer 2026: beaches and aquatic centers in the 78
• Wam Park 77: swimming, giant slides and water games in Fontainebleau
• The week's best bets in Paris and Île-de-France for June 8–14, 2026

What will become of the Étangs de Hollande recreation area in 2026?

Following the decision to close the site for the summer at the end of 2025, Rambouillet Territoires initially planned to shut it down entirely. A change of tack in early April: Geoffroy Bax de Keating’s arrival as the agglomeration’s president shook things up, just a few days before the season kicked off. The leisure base will therefore reopen this summer 2026, but under a new format of beach club without swimming. Visitors can enjoy the sand, the forest backdrop and the trails that wind along the six ponds dug in the seventeenth century to feed the Versailles Château’s basins, but swimming isn’t allowed. To stay updated on opening terms, we recommend checking the official site before you go.

In the meantime, outdoor-swimming enthusiasts in Yvelines (78) can turn to the Val de Seine Leisure Island in Verneuil-sur-Seine or the Boucles de Seine Leisure Island, and discover all our picks in our 2026 guide to Île-de-France leisure bases.