4.4
(50)
942
riders
8
rides
No traffic road cycling routes around La Bastide-De-Sérou offer diverse terrain within the Ariège Pyrenees, known for its sparsely populated roads and cyclist-friendly environment. The region features a mix of challenging mountain passes, such as those in the Massif de l'Arize, and tranquil back roads through picturesque hills and river valleys. Cyclists can also find dedicated greenways, like the V81, providing paved, car-free sections. This area is situated within the Parc Naturel Régional des Pyrénées Ariégeoises, ensuring scenic natural beauty…
Last updated: July 6, 2026
1.0
(1)
19
riders
35.6km
02:01
670m
670m
Cycle 22.1 miles (35.6 km) to Mondely Lake, a moderate road cycling route with 2200 feet (671 metres) of elevation gain.
5.0
(1)
33
riders
58.0km
02:44
770m
770m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

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5.0
(1)
15
riders
82.8km
04:10
1,140m
1,140m
Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.
13
riders
46.3km
02:14
620m
620m
Moderate road ride. Good fitness required. Some segments of this route may be unpaved and difficult to ride.
5.0
(1)
6
riders
34.5km
02:21
1,020m
1,020m
Hard road ride. Very good fitness required. Some segments of this route may be unpaved and difficult to ride.
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Popular around La Bastide-De-Sérou
I can only speak about my experience descending it from the south side, the one that starts in the village of Biert. It's simply a great pass, with a very tough final section, very similar to its close brother Mur de Peguère. With hardly any traffic, it has the appeal that the road is very narrow and very winding, which helps mentally.
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A magnificent spot with the road winding under the rock, running alongside a partially underground stream. It's both breathtaking and peaceful. Plus, there's a starting point for a short walk; I did the beginning and it was lovely: I'd love to come back and do a longer section!
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Be careful, since yesterday, June 19th, the descent to Rivèrenert has been freshly graveled and dangerous. I had a rear puncture due to small, sharp gravel sticking to the tire when braking. So, don't go crazy on this descent, friends.
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Because around 12pm and >31°C, the climb from Biert is mostly in the shade, and this pass generally ends a series of small linked passes (like Portech, Catchaudégué or La Core, Saraillé, etc.). And the challenge of the last 3 km is worth experiencing to strengthen your mental strength. Get to your pedals
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Beautiful little village near the cave!
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Beautiful cave and at the northern exit there is even a waterfall and another picnic area (in the shade, more for summer, in winter we prefer to picnic at the southern exit!)
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A place full of charm: a unique cave with the road passing under the rock: you have to go through it, and go through it again!
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Don't forget to stop there to taste some good local products
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The region offers a mix of truly car-free greenways and quiet back roads with very low traffic, ideal for road cycling. You'll find options ranging from gentle, paved paths like sections of the V81 greenway to more challenging routes on sparsely populated roads through the picturesque hills and valleys.
Yes, the V81 greenway (Voie Verte) is an excellent option for easy, car-free cycling. This 44-kilometer paved path, developed along an old railway line between Saint-Girons and Foix, passes through La Bastide-de-Sérou. It features gentle slopes, shaded sections, and unique illuminated tunnels, making it ideal for families and those seeking a relaxed ride. The Vernajoul Viaduct Greenway is part of this network.
Many routes offer expansive views of the Pyrenees, emerald forests, and rolling hills. Notable landmarks include the impressive Vernajoul Viaduct Greenway and the charming Arize river valley. You might also catch glimpses of the historic Château de Foix in the distance. For a unique natural wonder, consider a route that passes by the Grotte du Mas-d'Azil, a massive cave you can cycle near.
While truly car-free challenging routes are rare, the region offers numerous difficult routes on very quiet roads. For example, the Col de Péguère – Col de Portel loop from Saint-Pierre-de-Rivière covers 70 km with over 1600m of climbing, tackling passes like Col de Portel (1432m) and the infamous Mur de Peguere on roads with minimal traffic. The Prat d'Albis – Le Passe Temps loop also offers significant elevation gain.
The spring and autumn months generally offer the most pleasant conditions for road cycling, with milder temperatures and beautiful scenery. Summer can also be excellent, especially in the mornings or late afternoons, though some days might be warmer. The region's diverse terrain means you can find suitable routes almost year-round, depending on the specific weather.
Yes, many of the routes are designed as loops, allowing you to start and finish in the same location. For instance, the Grotte du Mas-d'Azil and Lac de Mondély Loop is a moderate 35 km circular route that takes you past key attractions. Another option is the Lac de Mondély – Mondely Lake loop, a 56 km ride with significant climbing.
The area is highly rated by the komoot community, with an average score of 4.06 stars. Reviewers often praise the quiet roads, stunning Pyrenean views, and the variety of terrain available, from gentle greenways to challenging mountain passes. The natural beauty of the Parc Naturel Régional des Pyrénées Ariégeoises is a frequently highlighted aspect.
Absolutely. Beyond the cycling itself, you can explore the Grotte du Mas-d'Azil, a unique cave system. The routes also often pass by the serene Lac de Mondély, offering beautiful lakeside views. The entire area is within the Parc Naturel Régional des Pyrénées Ariégeoises, ensuring a backdrop of stunning natural beauty and charming bucolic villages.
While La Bastide-de-Sérou is a rural area, the V81 greenway connects several towns, including Saint-Girons and Foix, which may have more public transport links. It's advisable to check local bus or train schedules for connections to these towns, as direct public transport to specific route starting points might be limited. Planning your route to start from a more accessible town along the greenway could be beneficial.
For routes utilizing the V81 greenway, you can often find parking in the towns it passes through, such as La Bastide-de-Sérou itself, or nearby Saint-Girons and Foix. For other routes on quiet back roads, look for designated parking areas in villages or near trailheads. Always ensure you park responsibly and do not obstruct local access.
The V81 greenway provides a substantial 44-kilometer car-free stretch, which can be combined with quiet local roads for longer rides. For example, the Lac de Mondély – Le Bascou loop from Le Mas-d'Azil is a difficult 82 km route that incorporates quiet sections and significant distance, offering a long-distance experience with minimal traffic.


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