4.0
(5)
40
riders
14
rides
Gravel biking around Comblessac offers routes through a landscape characterized by river valleys, greenways, and historical sites. The terrain includes converted railway lines and paths alongside canals, providing varied surfaces for gravel cyclists. While some routes feature gentle gradients, others include more significant elevation changes, traversing areas with forests and open countryside.
Last updated: May 22, 2026
7
riders
Hard gravel ride. Good fitness required. You may need to push your bike for some segments of this route.
3.0
(1)
4
riders
47.0km
03:10
530m
530m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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5.0
(1)
7
riders
49.8km
02:27
260m
260m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
3.0
(1)
3
riders
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(2)
9
riders
129km
06:56
820m
820m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Aff Valley, a superb route. Beware of roots in wet weather. But it's magnificent.
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This former watermill, documented as early as 1089, was initially used as a fulling mill before being converted into a flour mill in the 19th century. Its operation ceased on December 31, 1974. Since then, the building has stood as a significant heritage landmark, marking the industrial and riverine history of the Vilaine Valley.
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Great for a crepe break. Even better for a beer break!!
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Very beautiful castle, the crows that prowl around it make it look... strange.
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Pleasant and shaded on foot or by bike. A few paths // to do on foot or by mountain bike
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There are 15 gravel bike trails around Comblessac, offering a variety of experiences for different skill levels. You'll find options ranging from easy to difficult.
Yes, while most routes are moderate or difficult, there is at least one easy gravel bike trail available. These routes often utilize greenways or paths with gentle gradients, making them ideal for those new to gravel biking or looking for a relaxed ride.
For experienced gravel bikers seeking a challenge, routes like the Moulin de Blond Lock – Guipry-Messac Mill loop from Monteneuf offer significant distances and elevation changes. Another demanding option is the Vilaine River – Canal de Nantes à Brest loop from Carentoir, which covers over 130 km.
The terrain around Comblessac is diverse, featuring river valleys, converted railway lines (greenways), and paths alongside canals. You'll encounter varied surfaces, from smooth greenway sections to more rugged paths through forests and open countryside.
Many routes in the region offer scenic views as they traverse river valleys and open countryside. While specific viewpoints aren't always marked, the natural beauty of the landscape, including historical sites and greenways, provides a picturesque backdrop for your ride.
The region is rich in history and culture. You might encounter sites like the ancient Menhirs of Monteneuf or pass near historical castles. The Trécesson Castle – Entrance to the Val Sans Retour loop from Saint-Malo-de-Beignon, for example, leads through areas near such landmarks.
Yes, many of the gravel bike trails around Comblessac are designed as loops, allowing you to start and end at the same point. Examples include the popular Guer loop from Guer and the Oyon Valley Greenway – Augan old railway station loop from Guer.
The gravel biking routes in Comblessac are highly rated by the komoot community, with an average score of 4.3 stars. Riders often praise the varied terrain, the peaceful greenways, and the opportunity to explore historical sites and natural landscapes.
Spring and autumn generally offer the most pleasant conditions for gravel biking in the region, with mild temperatures and beautiful scenery. Summer can also be enjoyable, though it's advisable to start earlier in the day to avoid the midday heat. Winter rides are possible, but trails might be muddier or colder, so checking local weather conditions is recommended.
While some popular routes might see more activity, the extensive network of trails, especially those venturing further into the countryside or along less-known greenway sections, can offer a more secluded and peaceful gravel biking experience. Exploring some of the longer, more challenging routes often leads to quieter paths.
Absolutely! The region is known for its converted railway lines, or greenways, and paths alongside canals. The Oyon Valley Greenway – Augan old railway station loop from Guer is a prime example, offering a smooth surface along a former railway line through rural scenery.


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