4.0
(18)
135
riders
27
rides
Gravel biking around Four features a diverse landscape, combining tranquil greenways with more challenging ascents. The region is characterized by a mix of paths alongside water bodies like ponds and lakes, and routes that navigate through varied elevations. Gravel bike trails in Four often incorporate converted railway lines or canal paths, offering smoother sections, while also presenting significant climbs. This combination provides a range of experiences for gravel bikers seeking both scenic routes and physical challenges.
Last updated: July 3, 2026
13
riders
54.0km
02:47
230m
230m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
3.7
(3)
5
riders
48.7km
03:13
620m
620m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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4
riders
50.4km
03:20
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. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels.
3.8
(6)
8
riders
34.9km
02:38
530m
530m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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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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Meh, just good for walking around, no difficulty
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Superb greenway with a very pleasant surface, rolling in being tarmac. Often shaded, so good in summer
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Very nice cycle path, often shaded, with a great surface, compact but natural
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Hello, is this suitable for road biking? Or only for gravel? Thanks 🙂
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There are over 35 gravel bike trails in Four, offering a diverse range of experiences. These include 2 easy routes, 17 moderate routes, and 16 difficult routes, catering to various skill levels.
Gravel biking in Four offers a mix of challenges. While there are 2 easy routes, the majority of trails are either moderate (17 routes) or difficult (16 routes). Many routes feature significant elevation gains, such as the Étang de Chalignieu – Crémieu–Morestel Greenway loop from L'Isle-d'Abeau with over 2,000 feet (620 meters) of climbing.
Yes, Four offers some routes suitable for families, particularly those looking for less strenuous options. The region includes greenways and paths around ponds that are generally flatter. For a moderate option, consider the Bourbre Greenway – Étang de la Rosière loop from L'Isle-d'Abeau, which has a manageable elevation gain of around 275 meters.
The terrain in Four is quite varied. You'll find tranquil greenways, paths alongside water bodies like ponds and lakes, and sections that navigate through significant elevations. Many routes incorporate converted railway lines or canal paths, offering smoother sections, but also present challenging ascents.
Yes, many of the gravel bike trails in Four are designed as loops, allowing you to start and finish at the same point. Examples include the popular Étang de Chalignieu – Crémieu–Morestel Greenway loop from L'Isle-d'Abeau and the scenic Three Waters Pond – Four Winds Pavilion loop from L'Isle-d'Abeau.
Many routes in Four pass by beautiful natural features and historical sites. You can explore areas around lakes and ponds like Étang de la Rosière and Lake Saint-Quentin-Fallavier. Historical landmarks such as Château de Fallavier and various chapels like Chapelle Sainte-Anne are also accessible near some trails.
The gravel bike trails in Four are highly rated by the komoot community, with an average score of 4.1 stars from over 20 reviews. Riders often praise the diverse landscape, which combines tranquil greenways with challenging ascents, and the scenic sections around ponds and lakes.
While specific 'hidden gems' are often discovered through local exploration, routes that combine greenways with less-trafficked paths can offer a quieter experience. The Bourbre Greenway – Montée du Loup loop from Bourgoin-Jallieu is a moderate route that offers a good balance of greenway riding and some elevation, potentially providing a more serene ride.
The routes in Four vary significantly in length and duration. You can find trails ranging from around 27 km (17 miles) to nearly 49 km (30 miles). Durations typically range from 2 to over 4 hours, depending on the route's length and elevation gain. For instance, the Enter – Route de Beausoleil loop from Bourgoin-Jallieu is about 43 km (26.8 miles) and takes around 3 hours 8 minutes.
Given the region's mix of greenways, forests, and areas around ponds and lakes, you might encounter various local wildlife. This could include different bird species, small mammals, and aquatic life near the water bodies. Always ride respectfully and keep an eye out for animals, especially in quieter sections.
Yes, several routes in Four are designed to showcase the region's water features. The Three Waters Pond – Four Winds Pavilion loop from L'Isle-d'Abeau is a prime example, offering scenic sections around multiple ponds and providing beautiful waterside views throughout the ride.


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