4.3
(379)
3,753
riders
122
rides
Mountain biking around Onnion, located in the Haute-Savoie department of France, offers diverse terrain characterized by impressive mountain ranges and varied topography. The region features alpine landscapes, including mountains, cascades, and panoramic viewpoints, providing a range of elevations and technical challenges. Riders can explore trails along the Menoge river and through forests, with significant elevation gains on routes leading to passes like Col de la Ramaz.
Last updated: June 28, 2026
4.4
(10)
38
riders
21.1km
02:19
820m
820m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
3.5
(4)
24
riders
27.3km
02:50
870m
870m
Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.

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4.3
(3)
18
riders
18.8km
01:42
480m
480m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
4.7
(3)
12
riders
25.3km
02:13
760m
760m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
4.2
(5)
11
riders
23.4km
02:17
750m
760m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
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River in the forest during the descent to the village of Le Villard.
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A route for mountain bikers that invites you to explore the Vallée Verte between alpine meadow panoramas and forest passages.
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Here, the trail crosses a small hamlet made up of beautiful houses surrounded by pastures. Before heading into the forest, savor the open panorama of the surrounding mountains one last time.
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Intersection point Pont des Prés Altitude 766m
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This chapel, dedicated to Saint Bruno, founder of the Carthusian Order, was built on the remains of the former convent church of the Carthusian monastery of Sainte-Marie de Vallon[1]. In 1543, the Carthusians of Vallon were forced to leave their monastery, which was dismantled[1]. When they regained possession of their property in 1607, they found only ruins of the old charterhouse. Only a few sections of the walls remained standing[1]. After building their fortified house in Génicot[2] on the right bank of the Brevon (now on the lake), they erected a chapel in the part of the old charterhouse, in homage to Saint Bruno and in memory of the monks who preceded them. Since the walls of the choir of their former convent church and those of the sacristy had not collapsed, a nave surmounted by a wooden vault was built in 1651[3]. In 1793, it was sold as national property[3]. Abandoned by its new owners, it then passed to the Gougain family, along with the entire property known as "La chèvre"[1]. In 1833, the Carthusians returned to work repairing the walls and vault, redoing the roof, and installing a bell tower. Bishop Pierre-Joseph Rey inaugurated the renovated chapel during the summer of 1836[3]. It received various donations, including from Converset David François Marie[citation needed]. In 1847, it was finally transferred to the churchyard[1]. Processions would go there to pray for rain or good weather; but Bishop Louis Rendu banned these events in 1852[citation needed]. In 1855, it was burned to the ground. A violent wind blew as the Abbey building burned and burning embers set it alight in turn[1]. Nothing new remained except the walls. M Chappaz undertook a collection throughout the parish and had repairs carried out during 1856: plaster vault, roof, bell tower, gallery, floor, altar[3]. On July 11, 1857, the renovated chapel was blessed.
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Onnion offers a wide selection of mountain biking opportunities, with over 120 trails available. These routes cater to various skill levels, including 13 easy, 58 moderate, and 51 difficult options.
The terrain around Onnion is characterized by impressive mountain ranges and varied topography. You'll encounter diverse alpine landscapes, including challenging climbs, descents, and panoramic viewpoints. Trails range from beginner-friendly with less than 1,000 feet of elevation gain to challenging routes exceeding 3,000 feet, often requiring advanced riding skills.
Yes, Onnion has beginner-friendly options suitable for families, typically less than 2 hours of riding with up to 1,000 feet of elevation gain. These trails are categorized as STS S0 - S1, making them accessible for all skill levels. While specific family-friendly routes are not detailed, the presence of easy trails suggests suitable options.
The region is rich in natural beauty. You can enjoy stunning mountain views, and some routes, like the Francois Jaccard – Saint Bruno Chapel loop from Onnion, lead to breathtaking panoramic vistas from Chapelle Saint-Bruno. Other natural attractions nearby include the Cascade de la Diomaz (4km) and Cascade du Rouget (26km), though these may require a detour from the main biking trails. You can also explore various lakes and mountain passes in the wider area.
The warmer months are generally best for mountain biking in Onnion. The region's proximity to ski resorts like Praz de Lys Sommand and Hirmentaz suggests that trails are typically open and well-maintained during spring, summer, and early autumn when snow has melted and conditions are favorable.
Yes, many of the mountain bike trails in Onnion are designed as loops, offering circular routes. Examples include the La Combe de la Goutte loop from Bogève and the Francois Jaccard – Saint Nicholas Church loop from Onnion, which provide varied experiences without retracing your steps.
The mountain biking trails around Onnion are highly regarded by the komoot community, holding an average rating of 4.3 stars from over 400 reviews. More than 4,000 mountain bikers have used komoot to explore the varied terrain, often praising the impressive mountain ranges, diverse topography, and stunning alpine landscapes.
Absolutely. Onnion offers challenging routes that demand very good fitness and advanced riding skills. These trails can exceed 5 hours in duration or involve over 3,000 feet of elevation gain, with some sections potentially requiring riders to push their bikes (STS S3 - S6). The Francois Jaccard – Saint Bruno Chapel loop from Onnion is one such difficult route, offering significant elevation and panoramic rewards.
Yes, moderate trails are abundant in Onnion, making up the largest category with 58 routes. These rides can extend up to 5 hours and include up to 3,000 feet of elevation gain, requiring good fitness and advanced riding skills (STS S2). The Ramaz – Chalet Blanc loop from Le Praz de Lys is a good example of a moderate route.
Yes, Onnion is close to several ski resorts. Praz de Lys Sommand (9km away) and Hirmentaz (8.5km away) are nearby. During the warmer months, these resorts often convert their slopes and surrounding areas into mountain biking parks and trails, significantly expanding the options for cyclists in the region.
Elevation changes vary significantly across the trails. Beginner-friendly options might have less than 1,000 feet of gain, while moderate rides can include up to 3,000 feet. Challenging routes can exceed 3,000 feet of elevation gain, providing substantial climbs and descents throughout the mountainous terrain.
While specific 'less-known' routes aren't highlighted, the region's total of over 120 trails, including 51 difficult ones, suggests there are plenty of opportunities to discover less-trafficked paths beyond the most popular ones. Exploring the diverse network will likely lead to unique experiences away from the crowds.


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