4.4
(36)
263
riders
38
rides
Mountain bike trails around Marcilloles offer a diverse landscape for riders, characterized by rolling hills, extensive forests, and serene wetlands. The region is situated within the Isère department, providing a mix of terrain from gentle plains to more challenging ascents. Riders can explore the expansive Chambaran Forest, which features shaded paths and varied ground, or navigate routes around picturesque ponds and wetlands. The topography also allows for panoramic views of the Bièvre glacial plain and, on clear days, distant mountain…
Last updated: July 1, 2026
4.8
(5)
66
riders
45.3km
04:02
750m
750m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
4.6
(5)
39
riders
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary.

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5.0
(1)
8
riders
54.3km
04:53
1,070m
1,080m
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary.
7
riders
37.0km
03:01
650m
640m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
5.0
(2)
4
riders
54.5km
04:24
770m
770m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
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Built by a silk industrialist from Lyon in the second half of the 19th century, the Saint-Siméon-de-Bressieux factory comprises two parts connected by a glass roof. Adjacent to the factory, a large pisé building housed the accommodation for the workers who, coming from afar, lodged on site during the week. This silk mill, established in a rural setting, provided work for nearly 1,000 employees. It operated until 1934. https://www.alpes-isere.com/itineraire/de-soieries-en-chateaux-5335632/ https://patrimoine.auvergnerhonealpes.fr/dossier/IA38000981
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Be careful when passing at the bottom of this tower because the top collapses.
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Magnificent 360 degree view from the castle keep!
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Near the village of Roybon there is a series of landscaped ponds where it is possible to fish all year round.
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The Romanesque church of Saint-Pierre-de-Marnans, in Marnans, dates from the 12th century and is a major building of Romanesque art in Dauphiné. It is listed as a Historic Monument and every year hosts artists during the “Lesétés de Marnans” festival.
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Built by a silk industrialist from Lyon in the second half of the 19th century, the Saint-Siméon-de-Bressieux factory has two parts linked together by a glass roof. Adjoining the factory, a large adobe building housed workers who, coming from very far away, stayed on site during the week.
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The ruins of the feudal castle of Bressieux were classified as Historic Monuments in 1904. Many artists were inspired by it, the most famous of which was Jongkind who produced a watercolor in 1879 which is currently in the Louvre.
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The pond of Grand Gois offers a very bucolic setting. It's a great gravel spot.
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There are over 45 mountain bike trails around Marcilloles, offering a wide range of options for different skill levels and preferences. The komoot community has explored these routes over 300 times, highlighting the area's popularity for mountain biking.
The terrain around Marcilloles is diverse, featuring rolling hills, extensive forests, and serene wetlands. You'll find a mix of shaded forest paths, open areas, and routes around picturesque ponds. The region's topography also allows for panoramic views of the Bièvre glacial plain and, on clear days, distant mountain ranges like the Chartreuse, Alps, and Vercors.
Yes, Marcilloles offers several trails suitable for beginners and families. Out of the 45 available routes, 7 are classified as easy, providing a gentle introduction to mountain biking in the region. These routes often wind through less challenging terrain, allowing for a relaxed and enjoyable experience.
Absolutely. For experienced riders seeking a challenge, Marcilloles has 10 difficult mountain bike routes. One such route is the Château des Ayes – Col de Toutes Aures loop from Saint-Siméon-de-Bressieux, which covers 26.0 miles (41.9 km) with significant elevation changes, leading through varied and demanding landscapes.
While mountain biking in Marcilloles, you can enjoy stunning panoramic views of the Bièvre glacial plain and distant mountain ranges. The trails often pass through the rich Chambaran Forest, known for its diverse flora and fauna, and around picturesque ponds and wetlands. You might also encounter historical sites such as the Château Louis XI or the Notre-Dame-du-Mont Chapel, adding cultural interest to your ride.
Yes, many of the mountain bike trails around Marcilloles are designed as loops, offering convenient starting and ending points. For example, the popular Great foresight loop from Saint-Siméon-de-Bressieux is a 27.8-mile (44.7 km) moderate route that provides varied terrain through the local countryside.
The best time for mountain biking in Marcilloles is generally from spring through autumn. The Chambaran Forest takes on vibrant colors in autumn, and in September, you might even hear the bellowing of stags. While specific weather conditions vary, these seasons offer pleasant temperatures and beautiful natural scenery for riding.
Yes, the region around Marcilloles is known for its picturesque ponds and wetlands, such as the Étangs de Nantoin and Étang des Mermes. Many routes incorporate these natural features, offering serene backdrops for your ride and opportunities to observe diverse flora and fauna. An example is the L'Étang – Étang Berger loop from Viriville, which takes you past these scenic water bodies.
The mountain bike trails around Marcilloles are highly rated by the komoot community, with an average score of 4.5 stars from over 40 reviews. Riders often praise the diverse landscapes, which combine rolling hills, dense woodlands, and scenic ponds, as well as the variety of routes suitable for different ability levels.
The mountain bike trails near Marcilloles vary in length. You can find shorter routes, but many popular trails are moderate to long. For instance, the Bressieux Silk Mill loop from Saint-Siméon-de-Bressieux is 18.6 miles (30.0 km), while the Great foresight loop from Saint-Siméon-de-Bressieux extends to 27.8 miles (44.7 km), offering substantial riding experiences.
The Chambaran Forest is a significant natural area perfect for mountain biking in Marcilloles. It provides a rich environment with shaded paths and varied ground. The forest is also home to ponds and wetlands, offering opportunities to observe diverse flora and fauna, making it a key highlight for nature-loving riders.


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