4.3
(16)
118
riders
15
rides
Gravel biking around Alzen features a landscape shaped by historical transport infrastructure, including converted railway lines and greenways. The region offers varied terrain, from sections passing through old tunnels and over viaducts to paths alongside rivers and through rural areas. Elevation changes are present, providing both challenging climbs and more moderate sections suitable for different fitness levels.
Last updated: October 8, 2026
4.8
(8)
80
riders
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(3)
13
riders
53.4km
02:50
510m
510m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

4.0
(2)
11
riders
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
4.5
(2)
8
riders
42.1km
02:35
660m
660m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
3.0
(1)
6
riders
31.8km
01:43
230m
230m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
Get access to more routes and recommendations from other explorers.
Already have an account?
Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.
Start today with a free account
Your next adventure awaits.
Beginning or end of the railway cycle path „Voie Verte“ St. Girons - Foix or vice versa. A short section also serves to continue to (or from) Palmier. The Foix - Pamier route is neither signposted nor developed. But it can be easily ridden on small side roads.
0
0
At the school, there is a tap on an outbuilding. When heading towards Foix, this is the last tap directly on the cycle path that we noticed. It makes sense to refill your supplies here.
0
0
One of many old train stations on the route, all of which are inhabited as private homes. How we wished that one of them housed a café. Nostalgic memories of the Alpe-Adria journey are awakened!
0
0
Trailhoulet du Vernajoul 10.5 kms
0
0
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!
1
0
Old little station that reminds us of another time!
0
0
There are over 10 gravel bike trails documented on komoot around Alzen, offering a variety of experiences for different skill levels. The region is known for its routes along historical transport infrastructure like converted railway lines and greenways.
While many routes in Alzen are moderate to difficult, there are options suitable for those looking for a less strenuous ride. For example, the Foix – Vernajoul Viaduct Greenway loop from Saint-Martin-de-Caralp is a moderate 20.7-mile (33.3 km) path that incorporates greenway sections, making it a good choice for beginners or families.
Gravel biking around Alzen is characterized by varied terrain, including sections through old tunnels, over viaducts, and along greenways. You'll also find paths alongside rivers and through rural areas, with elevation changes providing both challenging climbs and more moderate sections.
Yes, advanced riders can tackle longer and more challenging routes. The The tunnels of Véloroute 81 – Foix–Saint-Girons Greenway loop from Castelnau-Durban is a difficult 50.1-mile (80.7 km) trail that explores extensive sections of the Véloroute 81, including its tunnels and greenway paths, offering a significant challenge.
The komoot community highly rates the gravel biking experience in Alzen, with an average score of 4.8 stars. Reviewers often praise the unique historical infrastructure, such as the old railway lines, tunnels, and viaducts, which provide a distinctive backdrop for rides. The varied terrain and well-maintained greenways are also frequently highlighted.
Many of the gravel routes in Alzen are designed as loops, allowing you to start and end at the same point. Examples include the Foix – Vernajoul Viaduct Greenway loop from Saint-Martin-de-Caralp and The tunnels of Véloroute 81 – Old Rimont Station loop from Castelnau-Durban, which offer convenient circular options.
The region's climate generally allows for gravel biking through much of the year. Spring and autumn often provide pleasant temperatures and beautiful scenery. Summer can be warm, making early morning or late afternoon rides ideal. Winter riding is possible, but check local conditions for ice or snow, especially in shaded tunnel sections.
Many routes in Alzen, particularly those that incorporate viaducts or elevated sections of old railway lines, offer scenic views of the surrounding rural landscape and river valleys. The greenway sections often provide open vistas, and the historical infrastructure itself is a point of interest.
While specific cafes directly on every trail are not guaranteed, routes that pass through or near towns and villages like Castelnau-Durban or Saint-Martin-de-Caralp will likely have opportunities for refreshments. Planning your route with komoot allows you to identify potential stops along the way.
For routes starting from towns like Castelnau-Durban or Saint-Martin-de-Caralp, you can typically find public parking facilities. It's advisable to check local parking regulations and availability in these starting points before your ride.
Access to trailheads via public transport can vary. While some larger towns in the wider region may have train or bus connections, direct public transport links to specific, more remote trail starting points might be limited. It's recommended to research local bus services or train connections to the nearest towns and plan accordingly.
While the main routes like those along the Véloroute 81 are popular, the extensive network of greenways and rural paths means there are always quieter sections to explore. Look for routes that venture further into the countryside away from the main historical infrastructure for a more secluded experience, such as the Old metal bridge – Vernajoul Viaduct Greenway loop from Sentenac-de-Sérou.


Browse the best Gravel rides in other regions.