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France
Auvergne Rhône Alpes
Nantua

Sonthonnax-La-Montagne

The best MTB trails around Sonthonnax-La-Montagne

4.4

(122)

761

riders

110

rides

Mountain biking around Sonthonnax-La-Montagne offers diverse terrain across a rolling plateau, river valleys, and higher elevations in the Ain department. The area features a mix of relatively flat sections and more challenging ascents and descents, with the highest point reaching 786 meters on the Chougeat plateau. Riders can explore dense woodlands, open plateaus, and riverbanks along the Ain River and the tranquil Lac de l'Oignin. This varied topography provides a natural playground suitable for different skill levels of mountain bikers.

Last updated: July 11, 2026

5.0

(4)

19

riders

#1.

Viaduct Cize-Bolozon – Cize-Bolozon Viaduct loop from Cize

33.0km

02:59

630m

630m

Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.

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Moderate

Hard mountain bike ride. Very good fitness required. Suitable for all skill levels.

Hard
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Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

Moderate

Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

Moderate

Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.

Easy
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Tips from the Community

ludo alias pause gourmande 🚲🥾🍰
May 10, 2026, Viaduc de Cize-Bolozon

An impressive work that has its Wikipedia page https://fr.wikipedia.org/wiki/Viaduc_de_Cize-Bolozon

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This superb wild natural site overlooks the river d’Ain. Lined with spectacular cliffs, it offers remarkable panoramas from its trails and viewpoints.

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Nestled in a spectacular natural setting, the viaduct offers superb viewpoints over the Ain gorges. Built at the beginning of the 20th century and then rebuilt after the Second World War in 1950, it illustrates the railway and road heritage of the territory.

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pretty little stone viaduct with 2 superimposed lanes, one for cars with 6 arches and one for the train with 11 arches. Atypical.

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Beautiful paved road, but for those who prefer dirt tracks, cross to the other side of the river! There won't be any cars and the views are even more beautiful.

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Pretty little viaduct which is a real must-see!

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Magnificent viaduct, nice spot for an outing in Ain.

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Definitely worth a visit, you simply have to include this double-decker bridge in your itinerary.

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Frequently Asked Questions

How many mountain bike trails are available around Sonthonnax-La-Montagne?

There are over 100 mountain bike trails around Sonthonnax-La-Montagne, offering a wide variety of options for different skill levels. You'll find everything from easy, rolling paths to more challenging routes with significant elevation gain.

Are there easy mountain bike trails suitable for beginners or families?

Yes, Sonthonnax-La-Montagne offers several easy mountain bike trails. For a pleasant ride, consider the Cize-Bolozon Viaduct – Cize-Bolozon Viaduct loop from Cize, which is 13.8 miles (22.2 km) long and features gentle terrain. The region's varied plateau and riverbanks provide accessible routes for those new to mountain biking or looking for a relaxed outing.

What kind of landscapes can I expect to see on the mountain bike trails?

The mountain bike trails around Sonthonnax-La-Montagne traverse diverse landscapes, including rolling plateaus, dense woodlands, and scenic river valleys. You'll encounter dramatic views along the Ain River and its gorges, tranquil sections near the Lac de l'Oignin, and picturesque villages like Heyriat and Napt. The terrain ranges from relatively flat sections to more challenging ascents and descents, offering a rich natural playground.

Are there any challenging mountain bike routes for experienced riders?

Absolutely. For experienced mountain bikers seeking a challenge, the region offers difficult routes with substantial elevation changes. A notable option is the Cize-Bolozon Viaduct – Cize-Bolozon Viaduct loop from Cize - Bolozon, a demanding 28.7 miles (46.1 km) path with over 1000 meters of ascent, providing expansive views and technical sections.

What are some points of interest or attractions along the mountain bike routes?

Many mountain bike routes pass by or near interesting landmarks. You can cycle past the impressive Cize-Bolozon Viaduct, explore the natural beauty of Lake Nantua, or discover the intriguing Grotte de Corveissiat. Other attractions include the historic Oliferne Castle Ruins and the serene Chartreuse de Sélignac.

Are there any mountain bike trails that feature waterfalls?

Yes, the region is rich in water features. You can find trails that lead to natural cascades, such as the Cascade de la Pisse Vache. The Oignin river and its gorges also offer scenic routes with opportunities to see water features.

What do other mountain bikers say about the trails in Sonthonnax-La-Montagne?

The mountain bike trails around Sonthonnax-La-Montagne are highly rated by the komoot community, with an average score of 4.5 stars from over 100 reviews. Riders often praise the varied terrain, the mix of rolling and technical sections, and the beautiful natural scenery, especially along the river valleys and plateaus.

Can I find long-distance mountain bike routes in the area?

Yes, there are several longer mountain bike routes for those looking for extended rides. For example, the Lac de Coiselet – Corveissiat Cave loop from Thoirette covers 28.5 miles (45.8 km) and takes you through varied landscapes including the Lac de Coiselet. Another option is the Along Lake Coiselet loop from Matafelon-Granges, which is 20 miles (32.1 km) long.

Are there mountain bike trails that offer views of lakes?

Absolutely. The region features beautiful lakes that are integrated into some mountain bike routes. You can enjoy rides around the tranquil Lake Nantua and the Lac de l'Oignin, with trails often running alongside their shores, providing pleasant waterside exploration.

What is the best time of year to go mountain biking in Sonthonnax-La-Montagne?

The diverse topography of Sonthonnax-La-Montagne makes it suitable for mountain biking across multiple seasons. Spring and autumn offer pleasant temperatures and vibrant scenery, while summer provides longer daylight hours. Even in winter, some trails may be accessible, though conditions can vary, especially at higher elevations.

Are there any mountain bike routes that are loops?

Yes, many of the mountain bike trails in Sonthonnax-La-Montagne are designed as loops, allowing you to start and finish at the same point. For instance, the popular Corveissiat Cave – Cize-Bolozon Viaduct loop from Cize is a 20.2 miles (32.5 km) circular route that offers scenic views.

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