4.5
(13)
39
riders
4
rides
Gravel biking around Saint-Ondras offers diverse terrain within the Isère department, characterized by countryside paths, forests, and woodlands. The region features varied surfaces, including hard gravel paths like the "Chemin des Marais" near Lake Paladru. Riders can expect views of the Bourbre valley and distant massifs, with routes traversing natural zones such as the Clandon marshes. This area provides a mix of challenging climbs and scenic routes suitable for mixed-surface cycling.
Last updated: July 2, 2026
5.0
(2)
7
riders
34.1km
02:26
570m
570m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
4.3
(6)
14
riders
44.3km
02:34
150m
150m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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5.0
(1)
5
riders
17.7km
01:10
70m
70m
Easy gravel ride. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels.
4.5
(2)
4
riders
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
4.0
(1)
5
riders
22.9km
01:15
50m
50m
Easy gravel ride. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels.
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Very straight cycle path with a very beautiful view in the middle of nature
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A famous praline brioche 😃
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Located at the northern end of Lake Paladru, this wetland is fed by the Courbon stream. It is a true extension of the lake, rich in biodiversity and very pleasant.
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Here, you enter a sensitive natural area for a 1-kilometer trail marked with four stations to discover the area's remarkable flora and fauna. A pleasant way to connect the two shores of Lake Paladru, between Paladru and Montferrat.
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A beautiful bridge that crosses the Rhône and demarcates a departmental boundary. It even offers a view of a castle!
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A tourist attraction in this area is Lake Paladru, which stretches from the village of the same name in the north to Charavines in the south. If you walk around the lake from a distance rather than on the paths directly along the shore, the hills offer some very beautiful views of the landscape. But not only that: on the outskirts of Bilieu – on the eastern shore of the lake – we pass a small sacred monument: a simple wayside cross made of two massive wooden beams (without a body or INRI inscription), which already shows the wear and tear of wind and weather.
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There are 10 gravel bike routes available around Saint-Ondras, offering a variety of experiences for different skill levels. These routes are highly rated by the komoot community.
The gravel bike trails around Saint-Ondras feature diverse terrain, including countryside paths, forests, and woodlands. You'll encounter varied surfaces, notably hard gravel paths like the famous Chemin des Marais, and routes that wind over crests offering views of the Bourbre valley and distant massifs like Chartreuse and Vercors.
While many routes feature significant elevation, the Cordon Bridge – Lac de Barterand loop from Saint-Genix-Sur-Guiers is classified as easy, making it a good option for those new to gravel biking or looking for a less strenuous ride.
For a more challenging experience, consider the Lac de Paladru – Our Lady of the Vines loop from Montferrat, which is 21.2 miles (34.1 km) with significant elevation gain. Another difficult option is the Col des Mille Martyrs – Pierre Chave Bridge loop from L'Arsenal, a 27.5-mile (44.2 km) trail with substantial climbs.
Yes, many of the gravel bike routes around Saint-Ondras are designed as loops. Examples include the Lac de Paladru – Our Lady of the Vines loop from Montferrat and the Chemin des marais – Lac de Paladru loop from Paladru, allowing you to start and end at the same point.
You'll encounter beautiful natural features such as the Lake Paladru, the ZNIEFF of the Clandon marshes, and various forests and woodlands. Many routes offer scenic viewpoints overlooking the Bourbre valley, the Dauphiné, and the majestic Chartreuse and Vercors massifs.
Yes, several routes pass by notable landmarks. The Lac de Paladru – Our Lady of the Vines loop from Montferrat goes near Our Lady of the Vines. The Chemin des marais – Lac de Paladru loop from Paladru incorporates the Chemin des Marais, known for its hard gravel path through the Paladru Nature Zone.
The gravel biking routes in Saint-Ondras are highly rated by the komoot community, with an average score of 4.7 stars from over 10 reviews. More than 50 gravel bikers have used komoot to explore the varied terrain, often praising the diverse landscapes and challenging climbs.
Many routes start from villages or towns like Montferrat, Paladru, or L'Arsenal, where public parking is generally available. It's advisable to check the specific starting point of your chosen route for detailed parking information.
Yes, the Chemin des marais – Lac de Paladru loop from Paladru specifically incorporates the Chemin des Marais. This hard gravel path traverses the Paladru Nature Zone and offers numerous spots for picnics.
The diverse landscapes of Saint-Ondras are enjoyable throughout much of the year. Spring and autumn offer pleasant temperatures and vibrant scenery. While winter biking is possible, trail conditions may vary, especially in higher elevations or after rainfall, so checking local conditions is recommended.


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