Best lakes around Briis-Sous-Forges are located in the Essonne department, an area recognized for its natural heritage. The region features smaller, ecologically significant ponds and retention basins, rather than large, prominent lakes. These water bodies are often integrated into walking trails and surrounded by forested areas, offering opportunities for nature observation and outdoor activities. The charm of Briis-Sous-Forges lies in these preserved natural spots and their surrounding landscapes.
Last updated: July 8, 2026
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Late afternoon bike ride: Magnificent track and path...in dry weather.
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The Carouge basin is the point of convergence of the Orge, Blutin, Salmouille and Boële. The basin was dug in the 1970s to extract materials for road construction, and also to manage the floods of the Orge. Here you can see many species of birds, such as seagulls, cormorants and ringed plovers depending on the season. The path along the basin is safe and flat.
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History of the work 15th century: Construction as a water supply reserve for a mill 1930: Breakup 1930s: Reconstruction 1990: Diagnosis 1993: Rehabilitation of the banks (with a drop in the water level of the lake by approximately 1 m for the work) 2003: Geotechnical study of the downstream wall with recommendations for work (drop in level of approximately 15 cm) 2004: Work to repair cracks 2007: Replacement of movement tracking markers 2019: Bathymetry / sampling and analysis of sediment and water quality 2020: Draining / cleaning / diagnosis
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After having traveled about twenty kilometers along the barley starting from Morsang sur orge, this lake offered us a magnificent landscape, hidden between the trees. It was difficult to leave this place to come back home!
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This water park is only the culmination of the Ollainville water treatment plant known as the Moulin Neuf, on a former industrial site that had been cleaned up and rehabilitated which had replaced the old mill. The site is next to the Syndicat de l'Orge, de la Rémarde et de la Prédecelle, which does everything in its power to ensure that the paths and routes in the Barley basin are practicable and maintained.
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It is one of the many Orge retention basins between Breuillet (Port Sud basin), Egly (Trévoix mill basin), Brétigny (Petit Paris and Carouge basins) and Longpont-sur-Orge (Parc de Lormoy) and beyond. These pools, very well maintained and offering exceptional flora and fauna, make it possible to make loops of more than twenty kilometers quite easily (as long as one remains in the valley). A set of exotic and relaxing pools.
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A large body of restful and calm water. It is possible to go around on a cycle path.
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The Briis-sous-Forges area is characterized by smaller, ecologically significant ponds and retention basins rather than large, prominent lakes. These water bodies are often integrated into walking trails and surrounded by forested areas, offering opportunities for nature observation and outdoor activities.
Yes, several lakes offer pleasant paths for walking and cycling. For instance, Trévoix Pond features a cycle path around its perimeter, making it ideal for both activities. The path along Carouge Basin is also safe and flat, perfect for a leisurely stroll.
Carouge Basin is an excellent spot for birdwatching, where you can observe various species like seagulls, cormorants, and ringed plovers depending on the season. The nearby La Mare des Aulnettes is also known for its rich biodiversity and diverse forest types, supporting a wide array of flora and fauna.
Yes, several lakes are considered family-friendly. Trévoix Pond and Lac d'Olainville are both highlighted as great spots for families to enjoy the outdoors.
The area around Briis-sous-Forges offers a variety of outdoor activities. You can find numerous routes for mountain biking, running, and cycling. For example, there are several MTB trails, running trails, and cycling routes that pass by or near these natural water bodies.
Yes, Beauséjour Lake has a notable history, originally constructed in the 15th century as a water supply reserve for a mill. It has undergone several reconstructions and rehabilitations over the centuries, reflecting its long-standing presence in the landscape.
The lakes and ponds in the Briis-sous-Forges area are primarily ecologically significant retention basins and natural spots for walking and nature observation. They are generally not designated for swimming, and wild swimming is not typically recommended or permitted due to their ecological role and management.
Many of the natural paths and trails around the ponds and retention basins are suitable for walks with dogs, provided they are kept on a leash and owners adhere to local regulations regarding pet waste. The flat and safe path around Carouge Basin is a good option.
The lakes and surrounding natural areas are beautiful year-round. Spring and autumn offer pleasant temperatures for walking and observing flora and fauna. Winter can also be a serene time for hiking, while summer is ideal for enjoying the greenery, though specific water activities are limited.
While the immediate vicinity of the smaller ponds might not have direct cafes, the commune of Briis-sous-Forges and nearby villages offer various dining options. It's advisable to check local listings for cafes, pubs, and restaurants in Briis-sous-Forges itself or in neighboring towns.
Access to these smaller, natural water bodies by public transport can be limited. While Briis-sous-Forges has some public transport links, reaching specific ponds often requires a combination of public transport and walking, or personal vehicle. Parking is generally available near popular trailheads.
Lac d'Olainville is cherished for its magnificent landscape, hidden among trees along the Orge river. Visitors often describe it as a beautiful, tranquil place that's hard to leave, offering a peaceful escape into nature.


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