4.5
(159)
3,587
riders
16
rides
No traffic road cycling routes around Cize-Bolozon are situated in the Ain department of France, characterized by the Ain River valley and the foothills of the Jura Mountains. The terrain features a mix of paved surfaces, gorges with limestone cliffs, and wooded hills, offering varied cycling experiences. The region includes notable landmarks such as the Cize-Bolozon Viaduct, which spans the Ain River. This landscape provides options for both moderate and challenging road cycling.
Last updated: October 24, 2026
4
riders
76.0km
03:50
1,090m
1,090m
Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.
9
riders
32.6km
01:33
370m
370m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

3.0
(1)
13
riders
38.5km
01:56
620m
620m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
4.5
(2)
28
riders
39.8km
02:03
640m
640m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
14
riders
53.6km
02:20
420m
420m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
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Popular around Cize-Bolozon
So I finished this superb day in Thoirette, at the Restaurant du Pont. And frankly… what a great idea! 🍽️ A very good meal to close this day as it should be. After spending several hours on the water, the pleasure of sitting down at the table and eating well takes on another dimension!
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An impressive work that has its Wikipedia page https://fr.wikipedia.org/wiki/Viaduc_de_Cize-Bolozon
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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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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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Lavoir de Aromas and its water point with an old communal fire-fighting engine. Church of Saint-André nearby. Aromas and its seven hamlets were part of the fief of the castle of Montdidier, the ruins of which can still be seen today. The village of Aromas is dominated by the hill of Cuquelu, on which stands a beautiful statue of the Virgin dating from the mid-19th century. In front of the church stands a calvary cross protected and classified by decree of November 24, 1906. The villages of Aromas, Villeneuve les Charnod, Faverges, Burigna and Ceffia have a covered washhouse. The commune of Ceffia was attached in 1974. The commune of Burigna was attached in 1823. The commune of l'Hôpital was attached in 1823 with its hamlets of Marsonnas and Marcia. Villeneuve les Charnod and Faverges were attached in 2017. https://www.terredemeraude.fr/aromas/
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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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There are 16 dedicated no-traffic road cycling routes around Cize-Bolozon featured in this guide. These routes vary in difficulty, offering options for different fitness levels.
The no-traffic road cycling routes around Cize-Bolozon offer a mix of challenges. This guide includes 2 easy routes, 11 moderate routes, and 3 difficult routes. The region's terrain, situated in the foothills of the Jura Mountains, often features 'calf-pulling passes' and elevation gains, making it suitable for cyclists seeking varied experiences.
Yes, many of the routes are designed as loops, allowing you to start and finish in the same location. For example, the challenging Viaduct Cize-Bolozon – Cize Viaduct loop from Thoirette covers over 75 km with significant elevation, while the Côte de Marcia loop from Aromas offers a moderate 24 km ride.
Many routes offer stunning views of the Ain Valley and the surrounding natural beauty. A prominent landmark is the impressive Cize-Bolozon Viaduct, a double-deck stone bridge spanning the Ain River. You might also encounter picturesque sections along the Ain River gorges with their high karst cliffs, or views towards the Jura Mountains. The Lac de Coiselet – View of Lac de Coiselet loop from Condes specifically highlights a magnificent lake.
The Ain region is generally excellent for road biking from spring through autumn. The varied terrain and natural beauty are best enjoyed in milder weather. While specific winter conditions can vary, many routes are mostly paved, making them accessible outside of heavy snow or ice.
While many routes in this guide are moderate to difficult, there are 2 easy routes that could be suitable for families with some cycling experience. The region's focus on dedicated cycling networks and quieter roads can make for a more relaxed experience, but always check the route details for distance and elevation to ensure it matches your family's capabilities.
Starting points for many routes, such as Cize - Bolozon, Thoirette, Aromas, or Condes, typically offer local parking options. It's advisable to check the specific starting point of your chosen route for the most convenient parking facilities.
The komoot community highly rates the road cycling experience in Cize-Bolozon, with an average score of 4.56 stars. Reviewers often praise the region's captivating landscapes, the mix of challenging climbs and scenic rides, and the architectural marvel of the Cize-Bolozon Viaduct. The focus on no-traffic routes also contributes to a more peaceful and enjoyable ride.
While specific cafes directly on every no-traffic section might be limited, many routes pass through or near charming villages where you can find local establishments for refreshments. Planning your route with potential stops in mind, especially in towns like Cize-Bolozon or other starting points, is recommended.
The Ain River, which flows through impressive gorges near Cize-Bolozon, offers opportunities for water activities. While specific designated wild swimming spots directly adjacent to car-free cycling routes might require a short detour, the river and nearby Lac de Conflans provide natural settings for enjoying the water. Always exercise caution and check local regulations before swimming in natural bodies of water.
Absolutely. For experienced riders seeking a challenge, routes like the Cize Viaduct – Cize-Bolozon Viaduct loop from Cize - Bolozon cover over 90 km with more than 1200 meters of elevation gain, demanding very good fitness. The region's terrain, with its 'calf-pulling passes' in the Jura foothills, ensures a rewarding experience for advanced cyclists.


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