4.0
(17)
56
riders
21
rides
Gravel biking around Saint-Agnin-Sur-Bion offers varied terrain across the Isère department in southeastern France. The region is characterized by a multitude of small woods and morainic hills, providing a diverse landscape for off-road cycling. Riders can expect undulating terrain with ascents and descents, alongside rural paths and forest tracks. This environment is well-suited for exploring on no traffic gravel bike trails.
Last updated: November 5, 2026
3.5
(4)
9
riders
50.2km
03:20
630m
630m
Hard gravel ride. Very good fitness required. Mostly paved surfaces.
4
riders
50.4km
03:18
500m
500m
Hard gravel ride. Very good fitness required. You may need to push your bike for some segments of this route.

7
riders
28.2km
01:37
140m
140m
Easy gravel ride. Mostly paved surfaces.
3.8
(6)
10
riders
34.9km
02:38
530m
530m
Hard gravel ride. Very good fitness required. Mostly paved surfaces.
3.0
(3)
5
riders
42.7km
03:04
610m
610m
Hard gravel ride. Very good fitness required. Mostly paved surfaces.
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Popular around Saint-Agnin-Sur-Bion
The "Trois Eaux" designation traditionally refers to the three distinct sources or supply networks (coming from wetlands, runoff from surrounding hills, and local springs) that join to form and maintain the level of this pond.
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The existence of the church is formally attested from 1113 in the cartulary of the temple of Vaulx. It initially served as a parish church. Labelled «Patrimoine en Isère», it is today a major venue for artistic and cultural exhibitions managed by a local association.
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It formerly depended on the domain of the Montbaly (or Monbaly) castle. Its primary function, however, remains uncertain and fuels several hypotheses: A pleasure pavilion (or "garden folly") for the castle owners. A hunting rendezvous point.A sounding box used to relay horn calls. An old postal relay station or a place of contemplation.
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The Voie Verte de la Bourbre is a secure development of about 8.5 kilometers reserved for non-motorized travel (bicycles, pedestrians, strollers, rollerblades). Managed by the CAPI (Communauté d'Agglomération de la Porte de l'Isère), it pleasantly follows the Bourbre river and today connects the towns of Bourgoin-Jallieu, L'Isle-d'Abeau and Vaulx-Milieu.
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A pretty chapel, with a water point. A deceased woman, born in 1795, is buried there
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Small isolated building in the place called Villieu (former islet in the heart of the Bourgoin marshes), consisting of a small nave lit by a bay on each side and extended by an apse with a lower height than the nave. The facade is pierced by an entrance door surmounted by a basket-handle lintel bearing the inscription 1893 / NOTRE DAME DE VILLEU. https://recensement.patrimoine-religieux.fr/eglises_edifices/38-Isere/38415-Saint-Marcel-Bel-Accueil/150630-ChapelledeVillieu
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A lovely restored and open chapel
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a pretty chapel
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There are 14 dedicated no-traffic gravel bike trails around Saint-Agnin-sur-Bion listed in this guide. These routes offer a variety of distances and difficulty levels, ensuring options for different skill sets.
The region around Saint-Agnin-sur-Bion is characterized by a mix of wooded areas, morainic hills, and rural paths. You'll encounter diverse surfaces, from forest tracks in places like Les Vernes and Le Bois des Bruyères to unpaved paths winding through undulating terrain. This provides a classic gravel biking experience with varied ascents and descents.
Yes, there are 2 easy no-traffic gravel routes. A good option for a more relaxed ride is the Bourbre Greenway – Montée du Loup loop from Bourgoin-Jallieu, which covers about 28 km with minimal elevation gain, making it suitable for those looking for a less strenuous experience.
The komoot community rates the no-traffic gravel trails around Saint-Agnin-sur-Bion highly, with an average score of 3.9 stars. Riders often praise the peaceful, traffic-free nature of the routes, the scenic wooded sections, and the varied terrain that keeps rides interesting without being overly technical.
Yes, many of the routes are designed as loops. For example, the challenging Étang de Chalignieu – Crémieu–Morestel Greenway loop from L'Isle-d'Abeau is a circular route covering nearly 49 km, taking you through diverse landscapes and back to your starting point.
While riding, you might encounter natural and historical points of interest. Keep an eye out for places like the tranquil Étang de la Rosière. The area also features historical elements, such as the village's 13th-century tower, and various chapels like Chapelle Sainte-Anne and Saint Joseph Chapel, offering glimpses into the local heritage.
Absolutely. For experienced riders seeking a challenge, routes like the Col du Croupion – Bourbre Greenway loop from L'Isle-d'Abeau offer over 50 km of riding with significant elevation changes. Another demanding option is the Enter – Route de Beausoleil loop from Bourgoin-Jallieu, which features substantial climbs and descents over its 43 km length.
The varied landscapes, including numerous wooded areas, make spring and autumn particularly pleasant for gravel biking. The mild temperatures and vibrant foliage (or blooming nature) enhance the experience. Summer can also be enjoyable, especially on routes that offer shade from the sun, but be mindful of potential heat.
Yes, some routes incorporate water features. The Three Waters Pond – Pavilion of the Four Winds loop from L'Isle-d'Abeau, for instance, suggests proximity to ponds, offering scenic views and tranquil spots along its 34 km length.
While Saint-Agnin-sur-Bion itself is a smaller village, nearby larger towns like Bourgoin-Jallieu and L'Isle-d'Abeau, which serve as starting points for some routes, are generally better connected by public transport. It's advisable to check local bus or train schedules to these towns if you plan to use public transport to reach the trailheads.
Many routes starting from towns like Bourgoin-Jallieu or L'Isle-d'Abeau will have public parking available. For routes in more rural areas, look for designated parking at trailheads or consider parking in nearby village centers, always respecting local regulations and private property.


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