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Gravel rides
France
Brittany
Pontivy

Le Sourn

The best traffic-free bike rides around Le Sourn

4.8

(8)

110

riders

6

rides

No traffic gravel bike trails around Le Sourn are characterized by a diverse landscape, featuring the winding Blavet River Valley and the historic Nantes to Brest Canal. The region's topography ranges from 46 meters to 184 meters, offering a mix of gentle canal paths and more undulating terrain. This varied environment provides extensive networks of routes suitable for gravel biking, including greenways and towpaths. The area is defined by its waterways and varied elevation, with the village center situated at the base of a granite massif.

Best no traffic gravel bike trails around Le Sourn

  • The most popular no traffic gravel bike trail is Rohan Castle – Cascade Lock loop from Neulliac, a moderate 25.1 miles (40.4 km) trail that takes 2 hours 1 minute to complete. This route offers scenic views along the historic canal and past notable locks.
  • Another top favourite among local gravel bikers is Cascade Lock – Canal de Nantes à Brest loop from Le Sourn, a moderate 30.5 miles (49.1 km) path. This route traverses the tranquil waterways and greenways of the Nantes to Brest Canal, providing varied terrain.
  • Local gravel bikers also love the Cascade Lock – Lock No. 138 of Bon Repos loop from Noyal-Pontivy, an 82.9 miles (133.4 km) trail leading through the Blavet River Valley and along the canal, often completed in about 7 hours 1 minute.
  • Gravel biking around Le Sourn is defined by its historic canals, river valleys, and varied topography, including sections along the Blavet River and the Nantes to Brest Canal. The network offers options for easy, moderate, and difficult routes, catering to different ability levels.
  • The routes in Le Sourn are highly rated by the komoot community with an average score of 4.3 stars from around 8 reviews. More than 100 gravel bikers have used komoot to explore Le Sourn's varied terrain.

Last updated: May 22, 2026

4.4

(5)

62

riders

#1.

Rohan Castle – Cascade Lock loop from Neulliac

40.4km

02:01

160m

160m

Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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Moderate

Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Hard
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Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Hard

Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Moderate

Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Moderate

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Popular around Le Sourn

Traffic-free bike rides around Le Sourn

Traffic-free bike rides around Le Sourn

Tips from the Community

Alain Couanau
August 21, 2025, Écluse nº 138 de Bon Repos

very nice walk

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A great detour to Saint Aignan, the Les Pêcheries de Guerlédan restaurant is very welcoming, with bike parking, a generous meal and welcome. Crossing the village, you can reach the canal a little further on via the lock.

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Average but good

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1

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Alright

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No tip, just enjoy this timeless (well not quite but hopefully you get what I mean) scene

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A stretch on the dam before the Trehu Moron dam. The landscape is constantly changing. The canal meanders through the countryside here. I love this landscape, and it's a good mood to drive here.

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Very nice lock along the canal

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Frequently Asked Questions

How many no-traffic gravel bike trails are available around Le Sourn?

There are 7 dedicated no-traffic gravel bike trails around Le Sourn featured in this guide. These routes offer a mix of easy, moderate, and difficult options, ensuring there's something for every skill level.

What kind of terrain can I expect on the no-traffic gravel trails in Le Sourn?

The terrain around Le Sourn is varied, perfect for gravel biking. You'll find extensive greenways and towpaths along the Blavet River and the Nantes to Brest Canal, offering relatively flat and smooth sections. However, the region also features undulating terrain with varied elevations, especially as you move away from the immediate waterways into the Plurit and Resto Valleys. The gravelly surface around Lac de Guerlédan is also noted for a pleasant riding experience.

Are there any family-friendly no-traffic gravel routes in Le Sourn?

Yes, the region offers several routes suitable for families, particularly those along the Canal de Nantes à Brest and the Blavet River. These paths are generally flat and traffic-free, providing a safe and enjoyable environment. For an easy option, consider the Pontivy Castle – Cascade Lock loop from Pontivy, which is just over 21 km and offers gentle slopes.

What historical landmarks or points of interest can I see along these gravel trails?

The no-traffic gravel trails around Le Sourn are rich in history and natural beauty. You can encounter numerous historical locks and chapels along the Blavet River and the Nantes to Brest Canal. Notable attractions include the impressive Pontivy Castle, the serene Saint-Nicodème Chapel, and the Guernal lock on the Nantes-Brest canal. The Canal de Nantes à Brest itself from Pontivy to Mûr-de-Bretagne is a significant highlight.

What is the best time of year to go gravel biking in Le Sourn?

The best time for gravel biking in Le Sourn is generally during the spring and autumn months when the weather is mild and the natural scenery is at its most vibrant. Summer also offers pleasant conditions, though it can be busier. While some areas can be humid, especially in the valleys, the well-maintained greenways and towpaths are enjoyable in most seasons. Always check local weather forecasts, especially after heavy rain, as some unpaved sections might become muddy.

Are there any circular no-traffic gravel routes available?

Yes, many of the no-traffic gravel routes around Le Sourn are designed as loops, allowing you to start and end at the same point. For example, the Cascade Lock – Canal de Nantes à Brest loop from Le Sourn offers a moderate 49 km circular ride, and the Rohan Castle – Cascade Lock loop from Neulliac is another excellent moderate option at just over 40 km.

What are the difficulty levels of the no-traffic gravel trails in this area?

The trails around Le Sourn cater to various skill levels. This guide includes 1 easy route, 4 moderate routes, and 2 difficult routes. Easy routes typically follow flat canal paths, while moderate routes might include some gentle ascents and descents. Difficult routes, such as the Cascade Lock – Lock No. 138 of Bon Repos loop from Noyal-Pontivy (over 133 km with 764m elevation gain), involve longer distances and more significant climbs.

Where can I find parking to access the no-traffic gravel trails?

Access points for the Canal de Nantes à Brest and Blavet River trails often have parking available in nearby towns like Pontivy, Neulliac, or Le Sourn itself. Many routes start from these locations, making it convenient to park your vehicle and begin your ride directly on the traffic-free paths.

What do other gravel bikers enjoy most about the trails in Le Sourn?

The area is highly rated by the komoot community, with an average score of 4.3 stars. Reviewers often praise the peaceful, traffic-free nature of the routes, the scenic beauty of the Blavet River Valley and Nantes to Brest Canal, and the historical points of interest along the way. The varied terrain, from smooth towpaths to more challenging gravel sections, is also frequently highlighted as a positive aspect.

Are there any longer, more challenging no-traffic gravel routes for experienced riders?

Yes, for experienced riders seeking a longer and more challenging adventure, the Cascade Lock – Lock No. 138 of Bon Repos loop from Noyal-Pontivy is an excellent choice. This difficult route spans over 133 km with a significant elevation gain of 764 meters, offering a full day of immersive gravel biking through diverse landscapes.

Can I access these gravel trails using public transport?

While Le Sourn itself is a smaller commune, nearby towns like Pontivy often serve as hubs for public transport. Cyclists can typically reach these towns by bus or train (depending on the specific service and bike carriage policies) and then connect to the extensive network of traffic-free gravel paths along the canals and rivers. It's advisable to check local public transport schedules and bike policies in advance.

Are dogs allowed on the no-traffic gravel bike trails around Le Sourn?

Generally, dogs are welcome on many of the public paths and greenways in the region, especially if kept on a leash. The traffic-free nature of these gravel trails makes them safer for pets. However, it's always best to observe local signage and regulations, particularly in nature reserves or specific protected areas, to ensure a pleasant experience for everyone.

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