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Gravel biking around Rieux, Morbihan, is characterized by its network of waterways and green landscapes. The region is bordered by the Oust and Vilaine rivers, offering extensive towpaths ideal for traffic-free cycling. These routes often feature flat or gently undulating terrain, providing a calm environment away from roads. The presence of the Nantes-Brest Canal further enhances the area's appeal for gravel bikers seeking scenic and historical paths.
Last updated: May 24, 2026
2
riders
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
2
riders
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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1
riders
63.5km
03:59
540m
540m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Popular around Rieux
Seine-Maritime has a rich 19th century industrial heritage in various forms. This is the case of the Touffreville-sur-Eu railway viaduct, which has just been awarded the "Rural Heritage of Seine-Maritime" label. The viaduct is part of the "Chemin Vert du Petit Caux" hiking trail. It all began in 1872 with the opening of the 40 km Dieppe-Eu railway line, on which the Touffreville-sur-Eu viaduct was built to cross the Yères valley. Inaugurated in 1885, the brick viaduct has nine arches and is operated by the Compagnie de l'Ouest, in particular for the transport of pebbles exported for industrial purposes. A coastal railway line then operates from Tréport to Le Havre to serve the beaches where seaside life is booming with casinos, villas and sumptuous hotels with architecture typical of the Normandy coast. From 1938, the line is closed to passenger traffic and reserved exclusively for freight transport. The Second World War led to the disappearance of most of the buildings on the coast and seaside activities were interrupted. Freight traffic then resumed until 1972, when it was stopped with the oil crisis. The SNCF then bought the 17 km line between Saint-Quentin-au-Bosc and Eu in 1986 to transform it into a hiking trail and that was the birth of the Chemin Vert du Petit Caux! Source: www.normandie-tourisme.fr
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Once again a place where History is present surrounded by a magnificent forest where it is pleasant to walk by bike or on foot
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Small bucolic spot for a short break, with a pretty water mill on the Yrès.
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This former royal residence has hosted the kings and queens of France and England. It was built in the 16th century by Henri de Lorraine, third Duke of Guise, and renovated in the 17th century by the Grande Mademoiselle, cousin of Louis XIV. It became the property of Louis-Philippe, the last king of France, who twice hosted Queen Victoria there. You can walk around the castle from the station, and visit the museum there.
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Eu residents lament that their town is really only known to crossword enthusiasts, who are familiar with the question of "a village in the valley of the Bresle with two letters." After all, Eu has a rich past, in which William the Conqueror married his cousin Mathilde of Flanders in 1050, and where more recently, at the end of the 19th century, King Louis-Philippe set up his summer residence here.
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Nothing remains of the castle where William the Conqueror and Mathilde of Flanders married in 1050. Louis XI had it demolished in 1475. The current castle was built in 1578 by Henri de Guise and Catharina van Kleef and has been restored several times. It came into the possession of the Orléans family and became one of the favorite cuttings of Louis-Philippe, who received Queen Victoria twice. From 1874 to 1879, Violet-le-Duc was charged with the refurbishment by the Count of Paris, grandson of the King. He modernized the castle and installed gas lamps and central heating. Since 1964, the castle has been owned by the city of Eu. It houses the town hall and the Musée Louis-Philippe and has been listed as a protected monument since 1985.
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Beautiful Gothic Church; Was supposed to be open during the day but wasn't when I was there.
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The mill belongs to the Manoir d'Hottineaux or Domaine de Penthièvre. The gate to the property was closed, which is a bit surprising given that there are even signposts leading there. The building is difficult to see from the street, but at least the mill wheel, which is still working, is visible.
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Our guide features 3 dedicated no-traffic gravel bike trails around Rieux. These routes are designed to keep you away from cars, offering a peaceful cycling experience.
The region around Rieux, particularly along the Vilaine River and the Nantes-Brest Canal, is known for its extensive towpaths. These paths typically offer flat or gently undulating terrain, with surfaces ranging from well-packed gravel to mixed unpaved sections, ideal for gravel biking. You'll find a mix of surfaces that are perfect for a smooth, traffic-free ride.
While all routes in this guide are traffic-free, making them generally safer, the difficulty varies. For a moderate option, consider the Wooden Bridge on Forest Trail – V1 Launch Site of Guerville loop from Longroy - Gamaches, which covers about 36 km with moderate elevation. Always check the route details to ensure it matches your family's cycling ability.
Many of the towpaths and natural trails around Rieux are suitable for dogs, especially if they are accustomed to running alongside a bike or can be carried in a trailer. However, always ensure your dog is under control, and be mindful of local regulations regarding pets in natural areas. It's best to check specific trail rules if available, but generally, the quiet nature of these routes makes them more dog-friendly than busy roads.
The trails around Rieux offer a blend of natural beauty and historical interest. You'll often find yourself cycling alongside the serene Vilaine River and the historic Nantes-Brest Canal, enjoying green banks and tranquil waterways. For specific points of interest, consider exploring highlights like the V1 Launch Site of Guerville or the Marais de Gousseauville. The Cycling Path Along the Bresle and Its Lakes also offers scenic views.
Given that many of these routes utilize towpaths and rural trails, parking is often available in nearby villages or designated car parks close to trailheads. For example, if you plan to ride the V1 Launch Site of Guerville – V1 launcher with explanation loop from Blangy-sur-Bresle, look for parking options in Blangy-sur-Bresle. Always check local signage for specific parking regulations.
Rieux is situated near Redon, a town well-connected by train, which can be a good starting point for accessing the wider network of towpaths along the Vilaine and Nantes-Brest Canal. From Redon, you might be able to cycle directly onto the car-free paths. Always check regional public transport schedules and bike carriage policies before planning your trip.
The no-traffic nature of these gravel trails means you'll enjoy quiet rides year-round. However, for the most pleasant weather, spring (April-June) and autumn (September-October) offer mild temperatures and beautiful scenery. Summer can be lovely, but trails might see more local foot traffic. Winter rides are also possible, though some paths might be muddier after rain.
While the trails themselves are often rural and away from direct amenities, towns like Redon, just 6 km from Rieux, offer charming cafes, restaurants, and markets. Planning your route to pass through or near these towns can provide excellent opportunities for refreshment stops. It's always a good idea to carry snacks and water, especially on longer sections.
Yes, the extensive network of towpaths along the Vilaine River and the Nantes-Brest Canal provides opportunities for longer rides. For example, the Eu Castle – V1 Launch Site of Guerville loop from Guerville is a challenging 63 km route. These interconnected paths allow you to extend your journey significantly, offering many kilometers of car-free cycling.
The trails in this guide range from moderate to difficult. For instance, two routes, including the Wooden Bridge on Forest Trail – V1 Launch Site of Guerville loop from Longroy - Gamaches, are rated as moderate, while one, the Eu Castle – V1 Launch Site of Guerville loop from Guerville, is considered difficult due to its length and elevation gain. Always check the specific route details for distance, elevation, and estimated duration to choose a trail that suits your fitness level.


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