Lakes around Villeneuve-D'Ascq offer diverse natural spaces within this green city in the Lille metropolitan area. The city features a significant number of interconnected lakes, originally designed as rainwater retention basins, which now provide extensive recreational opportunities. These water bodies and their surrounding parks serve as crucial links between urban areas and agricultural lands, supporting rich biodiversity. Visitors can explore a network of paths suitable for walking and cycling, enjoying the city's commitment to green infrastructure.
Last updated: July 6, 2026
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Very nice spot for quiet walks with the wooden footbridges. Be careful not to go too fast, it can get quite crowded
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The filter ponds in Leers were built to supply water to the Roubaix Canal, which is located nearby. Their primary function is to purify some of the water from the Grimonpont wastewater treatment plant. This plant initially filters 75% of the water; the ponds then process the remaining 25%. This final filtration takes seven days. During this process, the water flows through several ponds, moving from one to the other by gravity. This filtration technique is called phytoremediation: the water is naturally purified by algae, plants, and microorganisms that thrive in these ponds. In Leers, plants such as yellow iris and purple loosestrife, among others, play this purifying role. After seven days of filtration, the water flows into a final 9,000 m² basin. At this stage, it is perfectly purified and of very high quality. This final basin, known as the "storage basin," is the final step before the water is conveyed to the canal. The Leers filter ponds, formerly a landfill, are now a peaceful 5-hectare nature reserve, perfect for a relaxing walk, alone or with the family. The area is home to around thirty bird species, including the coot, the Mediterranean gull, and the reed bunting. If you look closely, you might even be lucky enough to spot a smooth newt swimming in the ponds, searching for small invertebrates to feed on. To protect the environment and wildlife, dogs must be kept on a leash on the paths and are not permitted in the winding sections of the ponds. Source: enm.lillemetropole.fr
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still as pleasant and for all levels
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A beautiful place to run between lake and forest. It is a haven of peace in the middle of the Lille metropolis.
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Beautiful place, close to the metropolis and yet in nature
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The most prominent lake is Heron Lake, located within the expansive Parc du Héron. It's a 110-hectare regional nature reserve offering extensive walking and cycling paths. Another popular spot is Leers Filtration Ponds, a peaceful 5-hectare nature reserve known for its birdlife and serene walks.
Yes, Villeneuve-d'Ascq is known for its network of paths around the lakes. Heron Lake offers a popular 5 km loop, and the interconnected 'chain of lakes' provides an approximately 12-kilometer scenic route perfect for extended walks and cycling, allowing you to experience a significant portion of the city's natural beauty.
The lakes are havens for biodiversity. The Parc du Héron, surrounding Heron Lake, is home to over 200 species of birds, making it an excellent spot for birdwatching. Leers Filtration Ponds host around 30 bird species, including coots and reed buntings, and you might even spot a smooth newt. Lac Saint-Jean is particularly noted for its numerous geese.
Absolutely. Many areas around the lakes are family-friendly. The Parc Urbain, which includes Lac Saint-Jean, offers well-maintained walking paths, areas for calisthenics, and children's play. The Parc du Héron, near Heron Lake, features cultural and educational attractions like the Parc archéologique Asnapio and the Ferme Petitprez with traditional Flemish games. Leers Filtration Ponds are also ideal for a relaxing walk with the family.
Near Heron Lake, within the Parc du Héron, you can explore the Parc archéologique Asnapio, which traces habitat evolution from the Neolithic to the Middle Ages. The park also houses the Pavillon de Chasse and the Ferme Petitprez, which features an estaminet with traditional Flemish games. The Ferme du Héron offers an educational space and a conservatory orchard.
Yes, birdwatching is a popular activity. Heron Lake and its surrounding Parc du Héron are a regional nature reserve with over 200 recorded bird species. For a dedicated spot, visit Observatiehut Péronne, an observation hut specifically designed for viewing nature and birds in a calm environment. Leers Filtration Ponds also provide excellent opportunities to spot various bird species.
The lakes are enjoyable year-round. Spring and summer offer lush greenery and vibrant wildlife, perfect for walks, cycling, and outdoor activities. Autumn brings beautiful foliage, while winter can offer serene, crisp views. However, some visitors suggest avoiding peak weekend hours at popular spots like Heron Lake if you prefer a quieter experience.
Yes, the area offers several running trails. You can find routes like the 'Heron Lake loop' or 'Singletrack in Parc du Héron' which are popular among runners. For more options, explore the Running Trails around Villeneuve-D'Ascq guide, which includes routes near the lakes.
The interconnected 'chain of lakes' provides a long, scenic route ideal for cycling. You can also find gravel biking routes that incorporate the lakes, such as the 'Heron Lake – Greenway Hem-Anstaing loop'. For a comprehensive list of cycling options, check out the Road Cycling Routes around Villeneuve-D'Ascq and Gravel biking around Villeneuve-D'Ascq guides.
Visitors appreciate the blend of natural beauty and accessibility. Many highlight the peaceful atmosphere, the extensive network of paths for walking and cycling, and the rich biodiversity, especially the birdlife. The ability to enjoy nature so close to the city, as well as the family-friendly amenities and cultural sites, are frequently praised.
Generally, dogs are welcome on trails around the lakes, but often with specific rules to protect wildlife. For example, at Leers Filtration Ponds, dogs must be kept on a leash on the paths and are not permitted in the winding sections of the ponds. Always check local signage for specific regulations in different areas.


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