4.8
(27)
213
riders
26
rides
Mountain biking around Aleu offers a diverse landscape characterized by challenging mountain passes, high-altitude ponds, and dense forests. The region features significant elevation changes, with routes often traversing cols and valleys. This terrain provides a mix of sustained climbs and technical descents, appealing to experienced mountain bikers.
Last updated: June 18, 2026
11
riders
41.1km
03:53
1,200m
1,200m
Hard mountain bike ride. Very good fitness required. Suitable for all skill levels.
9
riders
28.3km
02:58
890m
890m
Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.

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5.0
(2)
39
riders
38.6km
03:53
1,160m
1,160m
Hard mountain bike ride. Very good fitness required. Suitable for all skill levels.
4.7
(3)
9
riders
28.8km
02:38
990m
990m
Hard mountain bike ride. Very good fitness required. Suitable for all skill levels.
5.0
(1)
9
riders
71.9km
05:42
1,780m
1,780m
Hard mountain bike ride. Very good fitness required. Suitable for all skill levels.
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A heavenly place to enjoy the Pyrenees in their full glory. Ideal for a family picnic in spring or summer. Also, as there is a bar - restaurant, it is ideal if you want to have a drink on the terrace.
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0
I climbed it from its easier side, the one that starts from Foix and stretches for 28 kms, crossing the Col de Marrous. It's a steady climb, with a few tough kilometers, and very pleasant. It's the side used by the Tour de France to descend it. The best thing about the Mur de Peguère are the views from its summit.
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It is a MUST of the Pyrenees, without a doubt, that should be included in any route that crosses the Pyrenees from side to side. Any of its slopes 2 is spectacular and tough. The views from its summit are wonderful, feeling the wild side of the Pyrenees. Of course, once at the summit of this pass... you have to descend to the Étang de Lers and enjoy a quiet rest on the shores of the lake. It is a pass that has been part of the Tour de France route on several occasions, although always far from the finish line. The first professional rider to crest it in the lead was the unforgettable Marco Pantani in 1995.
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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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I liked the climb from the north side (from Massat), very scenic and alpine landscapes towards the end at the étang de Lers
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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.
2
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Mountain bike trails around Aleu are primarily suited for experienced riders. The region features significant elevation changes, sustained climbs, and technical descents. You'll find 13 moderate and 14 difficult routes, with no easy trails available.
There are 27 mountain bike trails around Aleu, offering a diverse landscape of challenging mountain passes, high-altitude ponds, and dense forests.
The routes vary in length and time. For example, the Lers Pond – Lers Pond loop from Biert is 25.5 miles (41.1 km) and takes about 3 hours 53 minutes. A slightly shorter option, the Seix – Seix loop from Oust, covers 17.6 miles (28.3 km) and typically takes around 2 hours 57 minutes.
Yes, many of the mountain bike routes in Aleu are designed as loops, allowing you to start and finish in the same location. Examples include the Lers Pond – Lers Pond loop from Biert and the Col de la Crouzette (1245 m) – Col de Péguère loop from Biert.
The region is rich in natural beauty. You can explore various mountain passes like Col de la Crouzette (1245 m) and Péguère Pass. The Couserans region itself is a natural monument, and you might encounter trails like the Cos Interpretation Trail.
The mountain bike trails in Aleu are highly regarded by the komoot community, with an average rating of 4.9 stars from over 20 reviews. Riders often praise the challenging terrain, the stunning mountain scenery, and the well-maintained paths through forests and valleys.
The best time for mountain biking in Aleu is typically from late spring to early autumn (May to October). During these months, the weather is generally more stable, and the higher mountain passes are free of snow, offering optimal riding conditions.
Winter mountain biking in Aleu can be challenging due to snow and ice, especially at higher elevations and on mountain passes. Many trails may become impassable or require specialized equipment. It's advisable to check local conditions and forecasts before planning a winter ride.
Given the challenging nature of the terrain with significant elevation changes and technical sections, most mountain bike trails around Aleu are not typically recommended for young children or beginner families. The routes are predominantly moderate to difficult.
Public transport options directly to all trailheads in the mountainous Aleu region can be limited. While some larger towns nearby might have bus services, reaching specific starting points for mountain bike trails often requires personal vehicle access. It's best to research specific routes and their accessibility.
Parking availability can vary depending on the specific trailhead. In smaller villages or popular starting points like Biert or Oust, you can often find designated parking areas. However, for more remote trails, parking might be less formal or require roadside stops. Always park responsibly and considerately.
Yes, the dense forests and natural landscapes around Aleu are home to various wildlife. You might encounter deer, wild boar, and a variety of bird species, especially during quieter times of the day or on less frequented trails. Maintaining a respectful distance is always recommended.


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