4.5
(2)
16
riders
4
rides
Gravel biking around Bonac-Irazein offers routes through the rugged mountainous terrain of the Pyrénées Ariégeoises Regional Natural Park. The landscape features prominent mountain passes, dense forests, and valleys, providing varied elevations and sustained climbs. The area's topography includes both paved and unpaved surfaces, catering to different skill levels.
Last updated: May 13, 2026
4.5
(2)
12
riders
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.

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1
riders
29.2km
02:25
800m
800m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
1
riders
19.8km
01:50
720m
720m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Our Lady of Montgarri
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The Amics de Montgarri Refuge has an incredible history. Apart from its two buildings, the 12th century temple and the 16th century building, this place has been used as a place of lodging for shepherds and smugglers. You can book up to 35 places in its different room options with shared shower and toilet services. It also has a catering service and rental and charging for ebikes. In winter you can book snowmobile or snowshoe adventures.
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It is an exceptional, magnificent place. We did the loop from Baqueira and returned via the Bonaigua pass. It was really great
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Directly on the river Noguera Pallaresa on the route to Vielha
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A great post through a high valley with beautiful views. Most of the time you are alone here. There are a few technical passages in between and you should have at least 40mm tires
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In Alas, the Guinguette, very friendly welcome, we were able to eat a plate of cold meats/cheese and raw vegetables!.
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There are 6 gravel bike trails available around Bonac-Irazein. These routes offer a mix of experiences through the rugged mountainous terrain of the Pyrénées Ariégeoises Regional Natural Park.
The terrain around Bonac-Irazein is characterized by rugged mountains, dense forests, and varied valleys. You'll encounter both paved and unpaved surfaces, including challenging sustained climbs and descents, particularly around prominent features like the Col de la Core. Some routes also incorporate former railway lines, known as Voie Decauville, which add a unique historical element to the ride.
While the region is known for its challenging mountain passes, there is one moderate gravel bike trail available: Moulis – Pont Vieux de Saint-Girons loop from Argein. This route offers varied terrain and is a good option if you're looking for a less strenuous ride compared to the more difficult options.
Yes, Bonac-Irazein is well-suited for challenging gravel biking. Most of the routes in the area are rated as difficult, featuring significant elevation gains and demanding climbs through mountain passes. For instance, the Carretera de Bonabé – Montgarri loop from 8.1 Aparcament d'Audeth… Parking Beret offers challenging climbs and panoramic views.
Yes, many of the gravel bike routes in Bonac-Irazein are designed as loops, allowing you to start and finish at the same point. Examples include the Castillon-en-Couserans – Church of Castillon loop from Castillon-en-Couserans and the Church of Castillon – Castillon-en-Couserans loop from Arrout.
Gravel biking in Bonac-Irazein offers access to stunning natural features and historical sites. You can encounter prominent mountain passes like the Portet-d'Aspet pass and the Core Pass, which provide superb panoramic views. The region also features beautiful lakes such as Lac de Bethmale and Étang d'Araing, and routes often pass through lush forests and past remnants of old mining operations, adding a cultural dimension to your ride.
The mountainous and often challenging terrain of Bonac-Irazein means that most gravel routes are geared towards experienced riders. However, if your family is comfortable with moderate climbs and varied surfaces, the Moulis – Pont Vieux de Saint-Girons loop from Argein could be a suitable option, offering a less demanding experience.
The Pyrénées region generally offers the best conditions for gravel biking from late spring through early autumn. During these months, the weather is typically more stable, and mountain passes are clear of snow, providing optimal riding conditions and access to the full network of trails. Always check local weather forecasts before heading out.
Bonac-Irazein and the surrounding Biros valley offer various accommodation options, including guesthouses and small hotels. For specific mountain hut experiences, you might consider places like the Valier House or Les Estagnous Refuge, which are popular with hikers and can be accessed from some routes.
The komoot community highly rates the gravel biking experience in Bonac-Irazein, with an average score of 4.5 stars. Riders often praise the challenging nature of the routes, the stunning panoramic views from mountain passes like the Col de la Core, and the opportunity to explore diverse landscapes, from dense forests to historical mining paths.
Generally, no specific permits are required for gravel biking on established trails within the Pyrénées Ariégeoises Regional Natural Park. However, it's always advisable to respect local regulations, especially concerning protected areas, private land, and any specific rules posted at trailheads. For more information on the park, you can visit tourisme-couserans-pyrenees.com.


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