4.5
(5)
13
riders
3
rides
Gravel bike trails around Bilieu traverse a diverse landscape in the Isère department, characterized by the turquoise waters of Lac de Paladru and the mountainous terrain of the Chartreuse Regional Natural Park. The region offers a mix of paved and unpaved surfaces, including gravel roads, wooded hills, and green meadows. Riders can expect varied terrain, from gentle greenways to more technical sections with significant elevation gain. The area provides scenic routes with panoramic views of Lake Paladru and the surrounding…
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.
4.5
(2)
4
riders
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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4.0
(1)
2
riders
25.8km
01:57
570m
570m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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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 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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The small rest area created here, with its very unusual design, invites passersby not to roll by carelessly: Behind the backrest of the bench rises a remarkable piece of craftsmanship: on one side, a flower stem bearing an unfolded blossom; and from the other, a bee flies towards it. An original idea, and rightly documented here several times with photos.
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Here we encounter three stone cubes stacked on top of each other, each smaller than the one below it. The gray cubes each have a white field in the center of their sides, with a cross carved into it, painted blue and standing out against the gray/white background. This construction forms the basis for the present small sacred monument: above it rises a radiant gold figure of the Madonna. From this prominent position, the Virgin Mary – venerated in France almost always under the title "Notre-Dame" ("Our Lady") – gazes far into the country, and has done so for more than 120 years. @Rainer N. has already explained the date and reason for its construction in his short post.
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A very popular lake to visit during the summer months when the lake is quite refreshing. Every year, there is a time trial around the lake.
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Very beautiful natural lake of glacial origin in the Chartreuse. The tour of the lake is about 17 kilometers through forest and fields, and allows you to admire the landscape from all angles.
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There are 12 gravel bike trails around Bilieu, offering a diverse range of experiences. The komoot community has rated these routes highly, with an average score of 4.3 stars.
The terrain around Bilieu is quite varied, featuring a mix of paved and unpaved surfaces, including gravel roads, wooded hills, and green meadows. You'll find everything from gentle greenways, especially around Lac de Paladru, to more technical sections with significant elevation gain within the Chartreuse Regional Natural Park.
While many routes in Bilieu are rated as difficult, there are moderate options available. For a more relaxed experience, consider the Lac de Paladru – Lake Paladru loop from Chirens, which offers a moderate ride around the scenic lake.
Experienced riders looking for a challenge will find several difficult routes. The Lac de Paladru – Our Lady of the Vines loop from Montferrat features a challenging ascent. Another demanding option is the Gorges du Crossey – Pierre Chave Bridge loop from Saint-Aupre, which explores varied terrain with notable elevation changes.
Many trails offer stunning views of the region's natural beauty. You can enjoy the distinctive turquoise waters of Lake Paladru. Routes also pass through the Chartreuse Regional Natural Park, offering views of its mountains and forests. For specific viewpoints, look for trails that include the Croix des Cochettes View of Lac de Paladru.
Yes, the region offers cultural insights. The Our Lady of the Vines is a notable religious site you might encounter. Additionally, the Chartreuse Regional Natural Park, which many routes traverse, is home to the famous Grande Chartreuse monasteries, adding a historical dimension to your ride.
The region is enjoyable for gravel biking during much of the year. Summer offers pleasant temperatures, especially around Lac de Paladru where you can combine biking with water sports. Spring and autumn provide cooler weather and beautiful scenery, particularly with the changing foliage in the Chartreuse Regional Natural Park.
Yes, many of the gravel bike trails around Bilieu are designed as loops, allowing you to start and end at the same point. Examples include the Col des Mille Martyrs – Pierre Chave Bridge loop from L'Arsenal and the Thousand Martyrs Pass – Col des Mille Martyrs loop from Chirens.
The gravel bike trails in Bilieu are highly rated by the komoot community, with an average score of 4.3 stars from over 10 reviews. Riders often praise the diverse terrain, the stunning views of Lac de Paladru, and the challenging climbs offered by routes in the Chartreuse Regional Natural Park.
Absolutely! Lac de Paladru, often called 'Lac Bleu,' is perfect for swimming and various water sports like sailing, canoeing, and paddleboarding, especially in summer. The Chartreuse Regional Natural Park also offers numerous hiking opportunities and panoramic views from summits like Charmant Som.
Yes, several routes incorporate notable passes. The Col des Mille Martyrs is a prominent feature on trails such as the Col des Mille Martyrs – Pierre Chave Bridge loop from L'Arsenal and the Thousand Martyrs Pass – Col des Mille Martyrs loop from Chirens, offering significant elevation and scenic views.


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