Cerin Peat Bog – Vallée Bleue Lake loop from Montalieu - Vallée Bleue

Cerin Peat Bog – Vallée Bleue Lake loop from Montalieu - Vallée Bleue

Hard

4.7

(3)

riders

Cerin Peat Bog – Vallée Bleue Lake loop from Montalieu - Vallée Bleue

03:13

62.6km

1,010m

Road cycling

Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride. The starting point of the route is accessible with public transport.

Last updated: August 24, 2026

Waypoints

Start point

Train Station

Get Directions

11.8 km

Montagnieu

Highlight • Other

A very pretty village.

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29.3 km

Cerin Lake, also known as the Cerin Peat Bog, is subject to various environmental protections. The early development of its formation compared to other lakes in the Jura Mountains makes it a benchmark in the geological and climatic study of the region.

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46.5 km

Start of the Climb to Col de Portes

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Start of the climb towards the Col de Portes from Bénonces.

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50.5 km

Start of the Col de Portes from Serrières-de-Briord

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Sign for the start of the Col de Portes starting from Serrières-de-Briord, with indications of altitude, difference in altitude, average slope...

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62.2 km

Vallée Bleue Lake

Highlight • Lake

La Vallée Bleue, a multi-activity leisure site in the Auvergne Rhône-Alpes region. It brings together a multitude of activities on the banks of the Rhône, in a remarkable natural setting.

Lake on the Haut Rhône with rental of mountain bikes, water pedals, go-karts, stand up paddle, boats with and without a license, jet ski, mini golf, tourist steam train and bike rails, inflatable games, pony rides , flyboard, bicycle repair workshop, treetop course, permanent orienteering course.

Restaurants. Aquapark with heated swimming pool, slide. Green spaces, fishing pond, picnic areas. 3* campsite with mobile home rentals and campervan service area in season, stopover gîte.

Source: Isère Tourism

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62.6 km

End point

Train Station

Way Types & Surfaces

Way Types

52.8 km

9.42 km

434 m

< 100 m

Surfaces