4.0
(12)
81
riders
3
rides
Gravel biking around Lac Du Filleit offers routes through the Plantaurel massif, characterized by a blend of lakeside paths, wooded sections, and open fields. This artificial lake, nestled between Le Mas-d'Azil and Lac de Mondely, provides a serene environment for cycling. The region features unpaved paths and quiet back roads, making it suitable for no traffic gravel bike trails. These routes often follow former railway lines, offering varied terrain with gentle gradients and occasional rolling hills.
Last updated: May 10, 2026
5.0
(9)
61
riders
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(1)
9
riders
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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2
riders
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
1
riders
48.9km
03:26
680m
680m
Hard gravel ride. Very good fitness required. You may need to push your bike for some segments of this route.
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Popular around Lac Du Filleit
Old little station that reminds us of another time!
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This is the longest tunnel on the greenway: it's super fun to go through. Be careful: it's a bit chilly!
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A very beautiful viaduct, it's a bit impressive and truly unusual on a greenway. The train used to go there, now the bikes go there!
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Hello everyone, I'm from Ariège, I decided this year to do the greenway with my dog Emy in both directions. It's a very beautiful walk, however there are some black points: lack of stone benches to deter potential thieves, and on the other hand the large Rimont tunnel which is 803 m long there is no more light. The motion detector does not work. Luckily that day I had my flashlight with me. There is horse excrement everywhere, perhaps one day we will have to ask the riders to pick up their droppings. It's a very beautiful walk.
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Beautiful views of the mountains!
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Small railway bridge, it's worth the detour, it's old!
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Greenway with magnificent landscapes, it's really great!
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Komoot features 3 dedicated no-traffic gravel bike routes in the vicinity of Lac Du Filleit. These routes are designed to offer a serene cycling experience away from vehicular traffic, often utilizing former railway lines or quiet forest tracks.
Yes, there is a moderate route that is suitable for beginners looking for a less strenuous ride. The The tunnels of Véloroute 81 – Old Rimont Station loop from Castelnau-Durban is 32.5 km long with manageable elevation, making it a great option to get started with gravel biking in the area.
The trails around Lac Du Filleit and the broader Ariège region often feature a mix of unpaved paths, forest tracks, and quiet back roads. You can expect varied surfaces, from compacted gravel to smoother sections, offering a true gravel biking experience. The region's landscape, part of the Plantaurel massif, provides diverse scenery including wooded passages and open fields.
The no-traffic gravel routes vary in length to suit different preferences. You'll find options ranging from approximately 32.5 km, such as The tunnels of Véloroute 81 – Old Rimont Station loop from Castelnau-Durban, up to longer rides like the The tunnels of Véloroute 81 – Foix–Saint-Girons Greenway loop from Castelnau-Durban which covers about 80.7 km.
Yes, all the featured no-traffic gravel bike routes around Lac Du Filleit are designed as circular loops. This allows for convenient starting and ending points, often from locations like Castelnau-Durban, without the need for shuttle arrangements.
While cycling these routes, you'll experience the natural beauty of the Plantaurel massif, including lakeside views and tranquil wooded areas. The routes often incorporate sections of the Véloroute 81, which is known for its tunnels, offering a unique historical and scenic element. Additionally, the area is close to Le Mas-d'Azil, home to the famous Grotte du Mas d'Azil, a prehistoric cave that can be crossed by road.
Many of the routes, such as those starting from Castelnau-Durban, offer convenient parking options. It's always recommended to check the specific route details on komoot for precise parking information at the trailhead.
The Ariège region, where Lac Du Filleit is located, generally offers pleasant conditions for gravel biking from spring through autumn. The varied terrain with wooded sections can provide shade during warmer summer months, while spring and autumn offer comfortable temperatures and vibrant scenery. Winter riding is possible, but conditions may vary with weather.
The komoot community highly rates the gravel biking experience here, with an average score of 5.0 stars. Reviewers often praise the tranquility of the routes, the absence of traffic, and the beautiful natural landscapes, especially the unique experience of cycling through the tunnels of Véloroute 81.
The tranquil environment around Lac Du Filleit and its surrounding wooded paths and open fields provides opportunities to observe local flora and fauna. You might spot various bird species and other small wildlife, particularly in the quieter sections away from the main lake area.
While the routes are generally traffic-free, it's always important to be prepared. Some sections may have varied surfaces, so ensure your bike is in good condition and you carry appropriate repair tools. Always be mindful of other trail users, especially on shared paths. For general information about the lake and its surroundings, you can visit the local tourism website: tourisme-arize-leze.com.


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