4.3
(632)
12,771
riders
123
rides
Road cycling around Lac De Grand Lieu is characterized by generally flat terrain and low elevation changes, making it accessible for various skill levels. The landscape features extensive reed beds, vineyards, and agricultural lands, with paths often leading through picturesque traditional villages. While direct access to the lake by bike is restricted due to its nature reserve status, designated no traffic road cycling routes allow cyclists to get close to its waters. The region's unique ecosystem, including the Acheneau river,…
Last updated: July 7, 2026
23
riders
77.5km
03:28
330m
330m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
5.0
(2)
13
riders
63.0km
02:49
200m
200m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

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4.5
(2)
14
riders
26.6km
01:07
130m
130m
Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.
15
riders
81.9km
03:39
370m
370m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
3.0
(1)
13
riders
51.1km
02:12
260m
260m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
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Popular around Lac De Grand Lieu
Join the port of La Morinière for a break by the Acheneau.
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Starting point for visiting the nature reserve
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Superb walk along the lake
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Everyone here seems to take similar photos of the canal with its many fishing huts and boats. This place is simply picturesque. Crossing the bridge with fully loaded bikes is not advisable. It is worth taking a small detour along the marked EV1 route over the next weir. Unfortunately, we didn't have enough time to eat in the small restaurant as we wanted to go to our accommodation in Bouin.
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Water management is essential for life in the swamp, it is managed by the SAH. (Syndicate of the Southern Loire Hydraulic Development). 51 municipalities are affected by the regulation of these waters by the Marais Breton Vendée or Marô. There are still 3 main locks in Port la Roche and 2 in Fresne.
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A place on the bridge overlooking the Acheneau river. The river is 30 km long. An interesting point is that this watercourse has such a slight slope that its course can be reversed when sufficiently high tides influence the river level. Human control of this river and the marshes of the southern Loire began especially under the influence and control of the Cistercian monks of the abbey of Buzay from the 12th century. Source: Wikipedia
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The name of these places is linked to history; The "Port la Roche" and the "Port du Fresne" are ancient ports where navigation was possible to connect the Port du Collet inland (as far as Machecoul) and to supply the villages of the marsh with food (food, Salt ...).
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There are over 120 dedicated no-traffic road cycling routes around Lac De Grand Lieu. These routes offer a variety of distances and difficulties, ensuring there's something for every cyclist looking to explore the region's unique landscapes.
Yes, Lac De Grand Lieu offers a good selection of easy, family-friendly no-traffic road cycling routes. You'll find over 30 routes specifically rated as easy, perfect for a relaxed ride. An example is the Roadbike loop from Bouaye, which is just over 26 km and features minimal elevation gain.
The no-traffic road cycling routes around Lac De Grand Lieu take you through a diverse mosaic of landscapes. You'll cycle past extensive reed beds, lush vineyards, agricultural lands, and charming traditional villages. The region is known for its flat terrain, offering scenic views of the natural lowland lake and its unique ecosystem.
Many routes offer glimpses of the lake and its surroundings. You can find excellent viewpoints such as the Lake Grand-Lieu, Pierre Aiguë site in Saint-Aignan de Grand Lieu, which provides some of the most beautiful perspectives. The Lake path between Bouaye and Saint Aignan de Grand Lieu also offers great views. For a deeper dive into the region's nature, consider visiting the Maison du Lac de Grand Lieu in Bouaye.
While the terrain is generally flat, there are longer routes that offer a good challenge. For instance, the Chapel of Prigny – Port du Collet loop from Bouaye covers nearly 90 km, providing a substantial ride through the area's quiet roads and villages. Most routes are moderate, with a few difficult options for those seeking an extended adventure.
The region is enjoyable for cycling throughout much of the year. Spring and autumn offer pleasant temperatures and beautiful scenery, with migratory birds often visible. Summer is also popular, though it can be warmer. Winter cycling is possible, but be prepared for cooler, potentially wetter conditions, especially given the lake's status as a large lowland lake in winter.
Absolutely! Lac De Grand Lieu is a significant nature reserve and an ornithological haven. While direct access to the lake is restricted, many routes pass through areas rich in biodiversity. You might spot various bird species, including gray herons, and observe the unique flora of the reed beds and wetlands. The region is home to numerous bird, mammal, and plant species.
Yes, many of the no-traffic road cycling routes around Lac De Grand Lieu are designed as loops, allowing you to start and end in the same location. An example is the Martinière Canal – Le Pellerin Ferry loop from Port-Saint-Père - Saint-Mars, which offers a scenic circular journey.
The area is highly rated by the komoot community, with an average score of 4.3 stars from over 550 ratings. Reviewers often praise the peaceful, traffic-free nature of the routes, the beautiful natural scenery, and the flat terrain that makes for enjoyable, accessible cycling. The opportunity to discover the unique ecosystem of the lake is also a highlight.
Many routes start from towns and villages around the lake, such as Bouaye or Port-Saint-Père, where public parking is generally available. It's advisable to check specific route details on komoot for recommended starting points and parking information to ensure convenience.
Yes, as many routes pass through or near traditional villages and towns, you'll often find opportunities to stop for refreshments. Look for cafes, bakeries, and small restaurants in places like Passay, Bouaye, or Saint-Philbert-de-Grand-Lieu to refuel during your ride.
Absolutely. Beyond cycling, the region offers hiking trails, and canoeing or kayaking on the rivers that feed into the lake (though not on the lake itself due to its protected status). You can also visit cultural sites like the 9th-century Abbatiale Déas in Saint-Philbert-de-Grand-Lieu or climb the church bell tower in Saint-Lumine-de-Coutais for panoramic views.


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