4.5
(146)
3,469
riders
227
rides
Road cycling around Cize-Bolozon, situated in the Ain department, offers varied terrain from tranquil plains to challenging climbs within the foothills of the Jura Mountains. The region is characterized by the Ain Gorges and the Ain River, which carves through the landscape, creating picturesque river loops. Cyclists encounter wooded hills and limestone cliffs, with higher points providing panoramic vistas. The area features an extensive network of cycling routes, including sections of the Ain à Vélo.
Last updated: July 4, 2026
5.0
(1)
32
riders
63.9km
03:00
780m
780m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
5.0
(1)
17
riders
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

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5.0
(1)
18
riders
41.2km
01:46
350m
360m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
5.0
(1)
5
riders
42.0km
02:06
690m
690m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
7
riders
97.1km
04:32
1,000m
1,000m
Hard road ride. Very good fitness required. Some segments of this route may be unpaved and difficult to ride.
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pretty small 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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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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The bridge separates two departments, the Jura and the Ain. "Iron bridge. For several centuries, the Ain was crossed at Thoirette using a ferry, called Christouphe's ferry, named after the commune where the passenger resided. From 1808 to 1811, the riparian communes contributed to building a bridge in place of this ferry. The project had been drawn up by Mr. Cordier, from Orgelet, an engineer then in charge of directing the works for the Simplon road. Various obstacles opposed the execution of this work. It was not until 1829 that an iron bridge was built, which collapsed in 1843. The Ain department has just replaced it with an iron bridge currently open to traffic". Statistique de la France - 1855 - Ministère de l'Agriculture by Imprimerie Impériale in Paris - p53.
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Restored and covered washhouse of Menouille with its water point.
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A must-see in Ain! It’s a chance to experience some elevation gain!
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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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The road cycling routes around Cize-Bolozon offer a varied terrain suitable for different abilities. While there are some moderate routes, the majority of the 228 available tours are classified as difficult, with 136 routes falling into this category. This suggests a landscape that provides both tranquil sections and challenging climbs, particularly within the foothills of the Jura Mountains.
Yes, Cize-Bolozon is well-suited for experienced road cyclists seeking challenging climbs. The region, nestled in the foothills of the Jura Mountains, features significant elevation gains. For example, the difficult route Cize-Bolozon Viaduct – Cize Viaduct loop from Thoirette covers nearly 97 km with over 1000 meters of elevation gain, offering a substantial test for riders.
Road cycling in Cize-Bolozon offers diverse and picturesque landscapes. You'll encounter the dramatic Ain Gorges, the meandering Ain River creating scenic 'boucles de l'Ain' (river loops), wooded hills, and impressive limestone cliffs like the Jarbonnet rocks and Berranger cliffs. Higher points such as Mont du Couloir (668 m) provide panoramic vistas of the surrounding natural beauty.
The undisputed centerpiece is the iconic Cize-Bolozon Viaduct, a remarkable double-deck bridge spanning the Ain River. Many routes, such as View of the bridge over the Ain River – Viaduct Cize-Bolozon loop from Thoirette, pass by this engineering marvel. Additionally, you can find magnificent views of the Ain River from the Gouffre de Fontaine Noire, located northeast of the viaduct. The region also features charming villages of the Revermont, offering pleasant stops.
While specific parking locations are not detailed in the route descriptions, many cycling loops around Cize-Bolozon originate from nearby towns like Cize, Bolozon, Hautecourt, Corveissiat, or Serrières-sur-Ain. It is generally advisable to look for public parking facilities within these villages or designated areas near popular trailheads, especially close to the Cize-Bolozon Viaduct, which is a significant landmark.
The region around Cize-Bolozon is part of the Ain department, which is generally well-connected. While specific public transport options for cyclists directly to trailheads are not detailed, the Cize-Bolozon Viaduct itself carries railway lines, including the TGV Paris-Geneva. For detailed information on public transport options that accommodate bicycles, it's recommended to check local transport schedules and policies for the Ain department.
The region's varied terrain and natural beauty make it appealing for road cycling across several seasons. Given its location in the foothills of the Jura Mountains, spring and autumn generally offer pleasant temperatures and vibrant scenery. Summer can also be excellent, though it's always wise to check local weather conditions before heading out, especially for longer rides.
While the majority of routes around Cize-Bolozon are classified as moderate to difficult, there are 10 routes considered easy. These easier options, often found on tranquil plains or along river sections, could be suitable for families or less experienced cyclists. It's recommended to check the specific route details on komoot for distance and elevation to ensure it matches your family's ability.
The road cycling routes in Cize-Bolozon are highly rated by the komoot community, with an average score of 4.6 stars from over 130 reviews. Cyclists frequently praise the varied terrain, from tranquil plains to challenging climbs, and the stunning natural beauty of the Ain Gorges and Ain River. The iconic Cize-Bolozon Viaduct is also a popular highlight, offering breathtaking views and a unique landmark experience.
The region around Cize-Bolozon includes charming villages, such as those in the Revermont, which offer opportunities for pleasant stops. While specific cafes or pubs are not listed for every route, these villages are good places to find refreshments. Planning your route to pass through these towns can ensure you have access to amenities during your ride.
There are over 220 road cycling routes available around Cize-Bolozon on komoot. This extensive network provides a wide range of options, from moderate to difficult, catering to various skill levels and preferences for exploring the region's diverse landscapes.
Yes, several loop routes in the area offer beautiful views of lakes. For instance, the Vouglans Dam – View of Lac de Vouglans loop from Thoirette is a popular 57 km route that provides stunning vistas of Lac de Vouglans. Another excellent option is the Vouglans Dam – Along Lake Coiselet loop from Matafelon-Granges, which takes you through the picturesque area around Lake Coiselet.


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