Cize Viaduct – Cize-Bolozon Viaduct loop from Nantua

Routes

Bike touring routes & trails

France

Auvergne Rhône Alpes

Cize Viaduct – Cize-Bolozon Viaduct loop from Nantua

Hard

4.5

(2)

riders

Cize Viaduct – Cize-Bolozon Viaduct loop from Nantua

03:58

60.1km

800m

Cycling

Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: August 20, 2026

Tips

Temporary access restrictions

Includes segments with temporary access restrictions. Check ahead to confirm restricted segments are open to the public.

After 59.3 km for 389 m

Waypoints

Start point

Bus stop

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724 m

Cycle path along Lake Nantua

Highlight (Segment) • Other

Beautiful path, probably busier when the weather is nice. If I read it correctly, the small road should be closed on weekends.

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3.24 km

Camping at Lake Nantua

Highlight • Rest Area

Perfect for an overnight stop for bike packing trips. The location is excellent, right by the lake. There are beautiful landscapes and it is close to the shops and restaurants of the village.

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28.0 km

Cize Viaduct

Highlight • Bridge

The Cize viaduct is one of the many impressive bridges that cross the Ain river.

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28.5 km

Cize-Bolozon Viaduct

Highlight • Other

The Cize-Bolozn viaduct is a railway road bridge that crosses the Ain river. It is 73 meters high and was built in 1875.

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37.0 km

Lac de Conflans

Highlight • Lake

This magnificent lake lies at the confluence of the Ain and Valouse rivers. It is located at the foot of the medieval Château de Conflans.

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39.4 km

Restaurant le Pont

Highlight • Restaurant

A café in the small village of Thierette. It is a very beautiful place next to the Ain river. It's just over the river and a nice place to take a break.

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39.5 km

Col de Matafelon

Highlight (Segment) • Mountain Pass

The Col de Matafelon from Thoirette is 3.6 km long with a total drop of 175 m. The average slope is 4.86%. It is part of the Massif du Jura.

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57.7 km

Lac de Nantua

Highlight • Lake

Lake Nantua is of glacial origin and is 141 hectares. The limestone cliffs offer a magnificent contrast with the emerald or sapphire water, depending on the day. Alexandre Dumas described …

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