Base et Île de loisirs des Boucles de Seine: beach, swimming and tree climbing in Yvelines (78)

If you're looking for a beautiful beach and nature activities, the Base de Loisirs des Boucles de Seine in Moisson offers a variety of exceptional leisure activities from April onwards. Come and discover a charming place with quality facilities for summer activities such as swimming, tree climbing and many other surprises.

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The Base de Loisirs des Boucles de Seine boasts a large lake accessible every day from 9am. You can take advantage of water sports rentals at weekends and on public holidays in May and June. What's more, from July 1 to August 31 2025, rentals will be available every day from 11am to 12:30pm and from 1:30pm to 6pm.

Don't forget that bathing is supervised from the end of May, on weekends and public holidays until the end of June, and from July 1 to the end of August, from 11am to 6:30pm. Outside these days, swimming is prohibited. From the end of May, access to the site will be subject to a charge. Dogs are allowed, provided they are kept on a leash and are not allowed on the beach or in the premises.

La Base offers an ideal setting for your outdoor activities. You'll be fascinated by the 350 hectares of wooded, flower-filled landscapes on the banks of the Seine. Take advantage of a wide range of water sports such as :

• Supervised swimming from June 30 to August 31, 2025 from 11 a.m. to 6:30 p.m.
• Sailing
• Catamaran sailing
• Pedal boats
• Carp and pike fishing
• Canoeing
• nautical equipment hire available every weekend in April, from 1:30 pm to 5:30 pm

What's more, we offer a wide range of sports and leisure activities:

• Indoor and outdoor tennis courts
• Walking and cycling trails around the lake
• 18-hole golf course
• Archery
• Orienteering course
• Kite surfing

Among these activities, Accrocamp, the Boucles de Seine accrobranche, is a must. With 7 courses at different levels, and exciting workshops such as the 12-metre leap into the void, it promises an unforgettable experience.

Come and discover the charm of the Base de Loisirs des Boucles de Seine, an ideal place for a getaway with family or friends, for a day or more. You can also rent a room for a meeting or reception for up to 70 people.

In addition to the many activities on offer, the site also features picnic areas and rest areas.

Another strong point of this base is that barbecues are permitted in the designated areas (picnic tables are available near the swimming area). It's an ideal spot for a nice barbecue by the water.

Please note that access to the leisure island is subject to a charge during supervised bathing periods, starting at €5. The leisure park is open all year round, and land-based activities (minigolf, Nordic walking, tennis, mountain biking, etc.) are also available all year round. If you'd like to try your hand at water sports, you can do so in fine weather! How about a trip to the leisure center next weekend?

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