5.0
(2)
28
riders
7
rides
Gravel biking around Sor features a landscape characterized by significant elevation changes, with routes traversing mountain passes and valleys. The region offers a network of unpaved roads suitable for gravel bikes, often leading through forested areas and open terrain. These routes provide challenging climbs and descents, catering to experienced gravel bikers. The terrain is defined by its hilly nature, with many trails including substantial ascents.
Last updated: July 9, 2026
12
riders
63.6km
03:36
530m
530m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(1)
3
riders
62.8km
05:04
1,940m
1,940m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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5.0
(1)
8
riders
52.1km
03:40
1,240m
1,240m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
2
riders
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
1
riders
29.2km
02:25
800m
800m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Superb site offering a beautiful panorama over the Bethmale valley and the Mont Valier massif
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An emblematic pass in the Couserans, popular with cycle tourists and hikers, it offers a superb panorama of the mountains and valleys.
0
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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!
1
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Small railway bridge, it's worth the detour, it's old!
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Superb path and pretty connection between Saint-Girons and Moulis, allowing you to avoid the very busy departmental road.
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0
In Alas, the Guinguette, very friendly welcome, we were able to eat a plate of cold meats/cheese and raw vegetables!.
1
0
Gravel biking in Sor is primarily suited for experienced riders due to the demanding elevation profiles and significant climbs. Most routes feature challenging ascents and descents, traversing mountain passes and unpaved forest roads. There are no easy-rated gravel tours listed in the region.
You can expect a landscape characterized by significant elevation changes, including mountain passes and valleys. The routes largely traverse unpaved roads, often leading through forested areas and open terrain. Prepare for challenging climbs and descents on hilly ground.
Many gravel routes in Sor pass by beautiful natural features. You might encounter highlights such as the Core Pass, the serene Ayes Pond, or the picturesque Lake Bethmale. Some trails also offer views of the Engomer summit.
Yes, beyond natural sights, you can find interesting landmarks. The Core Pass is a notable point of interest. You might also pass by the Valier House or the Col de Portet d'Aspet from Audressein, depending on your chosen route.
The gravel biking routes in Sor are highly rated by the komoot community, with an average score of 5.0 stars. Reviewers often praise the challenging nature of the trails, the significant elevation gains, and the scenic beauty of the mountain passes and unpaved forest roads.
Many of the popular gravel bike routes in Sor are designed as loops. For example, the Étang de Bethmale – Castillon-en-Couserans loop from Moulis and the Core Pass – Col de Portech loop from Moulis are both circular routes, allowing you to start and finish at the same point.
Given the region's mountainous terrain and significant elevation changes, the best season for gravel biking in Sor is typically from late spring through early autumn. During these months, you'll generally find more favorable weather conditions, with less chance of snow or ice on higher passes and more stable trail surfaces.
Due to the challenging nature of the terrain, with demanding elevation profiles and difficult grades, most gravel bike routes in Sor are not recommended for families with young children or those seeking very easy rides. The region caters more to experienced riders looking for a significant challenge.
Given the challenging routes and varied terrain, it's advisable to pack essentials such as plenty of water, energy snacks, a repair kit (including spare tubes, pump, and multi-tool), appropriate layers of clothing for changing mountain weather, and a first-aid kit. A GPS device or a loaded komoot tour on your phone is also highly recommended for navigation.
While Sor is known for its network of unpaved roads, the region's challenging nature means it generally attracts experienced riders rather than large crowds. To find quieter routes, consider exploring some of the less-trafficked paths that venture deeper into the forested areas, such as the Saint-Lary – Portet-d'Aspet pass loop from Castillon-en-Couserans, which offers a remote feel.
The gravel trails in Sor often lead through remote, forested areas and mountain passes, meaning refreshment stops like cafes are not always directly on the route. It's best to plan your rides to start or end near villages or towns where amenities are available, or to carry sufficient food and water for the duration of your tour.
Gravel bike routes in Sor vary, but they generally feature significant distances and elevation gains. For instance, the Castillon-en-Couserans – Church of Castillon loop from Castillon-en-Couserans is about 17.9 miles (28.9 km) with over 900 meters of elevation gain, while longer routes like the Church of Castillon – Castillon-en-Couserans loop from Arrout can be around 28.8 miles (28.8 km) with over 800 meters of climbing.


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