4.4
(248)
4,868
riders
299
rides
Road cycling routes around Réserve naturelle du lac de Grand-Lieu are characterized by a generally flat topography, making them accessible for various fitness levels. The region features the expansive Lac de Grand-Lieu, France's largest natural lake on the plain during winter, surrounded by diverse habitats including reedbeds and wet meadows. The terrain offers minimal elevation changes, with many routes utilizing paved surfaces and dedicated cycle paths. The Acheneau river, which feeds the lake, also contributes to the unique aquatic landscape.
…Last updated: July 18, 2026
4.4
(39)
344
riders
47.6km
02:00
170m
170m
Moderate road ride. Good fitness required. Some segments of this route may be unpaved and difficult to ride.
5.0
(1)
16
riders
Moderate road ride. Good fitness required. Some segments of this route may be unpaved and difficult to ride.

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16
riders
53.1km
02:13
150m
150m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
14
riders
85.6km
03:46
440m
440m
Moderate road ride. Good fitness required. Some segments of this route may be unpaved and difficult to ride.
4.3
(3)
105
riders
45.9km
01:55
220m
220m
Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.
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Popular around Réserve naturelle du lac de Grand-Lieu
Trentemoult, once a fishing village with very colorful houses, is a former island territory bordered by the Loire, facing the vestiges of the port of Nantes. As early as the 14th century, the village was recognized for having a monopoly on fishing in the Lower Loire. Then, in the 19th century, the Trentemousin sailors abandoned fishing in favor of maritime trade. Today, artists and artisans have replaced the fishermen, cafes and small restaurants have taken their place on the port, now dedicated to pleasure boating.
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Superb walk along the lake
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perfect path for mountain biking while visiting the beautiful landscapes of the region.
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Fording depends on the water level of the river. Very nice place for lunch or a picnic.
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The largest natural plain lake and the second largest ornithological reserve in France, Lake Grand-Lieu offers magnificent lakeside landscapes. Here, you have to get off your bike to get as close as possible to its waters.
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One of the central squares in Nantes. The fountain is worth seeing, as are the surrounding buildings, but somehow it doesn't really have any charm - the square is probably just a little too big and the surrounding houses a little too monotonous.
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There are nearly 300 road cycling routes around Réserve naturelle du lac de Grand-Lieu. This includes over 60 easy routes, more than 220 moderate routes, and a few more challenging options, catering to various skill levels.
The terrain around Lac de Grand-Lieu is generally flat with minimal elevation changes, making it suitable for a wide range of cyclists. Routes predominantly feature paved surfaces and gentle gradients, often following quiet country roads, agricultural paths, and dedicated cycle paths through marshes, vineyards, and traditional villages.
While many routes utilize quiet country roads, the region offers numerous easy routes suitable for families. For routes specifically designed to minimize car traffic, look for paths that follow dedicated cycleways or smaller agricultural roads away from main thoroughfares. The generally flat topography makes these routes accessible for all ages.
The region offers several 'windows' to the lake, providing exceptional vistas. These include the Maison du Lac de Grand-Lieu in Bouaye, the old fishing village of La Chevrolière in Passay, and Pierre Aigüe in Saint-Aignan-de-Grand-Lieu. The bell tower of the Saint-Léobin church in Saint-Lumine-de-Coutais also offers panoramic views from 40 meters high.
The best time to cycle is generally from spring to autumn. The lake's appearance shifts with the seasons, offering dynamic scenery. In winter, the lake expands significantly, covering over 6,000 hectares, which can impact access to some lower-lying paths, though many routes remain open year-round.
Yes, several routes provide excellent lake views. The Lake Grand-Lieu – Grand-Lieu Lake Observatory loop from La Chevrolière is a popular choice, leading through lakeside areas and offering views towards the observatory. You can also find great vistas from designated viewing points like those near La Chevrolière.
The Réserve naturelle du lac de Grand-Lieu is a haven for wildlife, recognized as the second-largest ornithological reserve in France. You can expect to see over 270 bird species, including a significant colony of grey herons, especially in the vast reed beds and flooded meadows. The diverse habitats also support over 550 plant species.
Parking is generally available in the charming traditional villages surrounding the lake, such as La Chevrolière, Bouaye, and Saint-Philbert-de-Grand-Lieu. Many routes start from these accessible points, offering convenient places to leave your vehicle.
The area is highly rated by the komoot community, with an average score of 4.3 stars from over 210 reviews. Reviewers often praise the generally flat terrain, the diverse and captivating scenery of the lake, marshes, and vineyards, and the quiet country roads that make for a pleasant cycling experience.
Yes, many cycling routes in the region traverse picturesque countryside that includes agricultural lands and vineyards, particularly the Muscadet vineyards. These routes offer a blend of natural beauty and cultural insights into the local wine-making heritage.
Yes, the The Acheneau – Le Martipontain - Ferry loop from La Chevrolière is a moderate 47.6 km path that follows the Acheneau river, offering scenic views through rural landscapes.
For experienced road cyclists looking for a moderate challenge, the Lake of Parc de la Boulogne – Lake Grand-Lieu loop from La Chevrolière is a 58.8 km route with gentle ascents and views of the lake and surrounding parkland. Another option is the Picture frame by Emmanuel Ritz – Chaussée des Moines loop from La Chevrolière, which is 55.5 km long.


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