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: December 19, 2025

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Waypoints

Start point

Train Station

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26.5 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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44.5 km

Fosses Pass

Highlight • Mountain Pass

Little traffic.
Beautiful panoramas of the Alps on the east side.

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45.7 km

Lac d'Ambléon

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A small altitude lake in the heart of Bugey. Easily accessible: on the roadside.

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50.5 km

Departure from Col des Fosses in Appregnin (information panel)

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All the information you need about the upcoming climb: length, average gradient, etc.
A great initiative from the Ain Department.

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74.1 km

Col de Portes (1010 m)

Highlight • Mountain Pass

See the proposal of the Toqués du Col de Portes to the most unreasonable.

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74.1 km

Portes Pass

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The Col de Portes (also called Calvaire de Portes) is located in the Bugey massif, at the southern end of the Jura massif in the Ain department. It peaks at …

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77.7 km

Golet au Loup

Mountain Pass

83.6 km

View of the Vallée Bleue

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View of the Blue Valley of Montalieu-Vercieu during the descent from the Col de Fay.

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84.2 km

Col de Fay

Highlight • Mountain Pass

Nice flexible rise in postcard decorations.

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92.1 km

Ruins

108 km

End point

Train Station

Way Types & Surfaces

Way Types

89.8 km

10.3 km

7.25 km

387 m

190 m

136 m

Surfaces

106 km

1.77 km

209 m

< 100 m

Elevation

Highest point (1,000 m)

Lowest point (190 m)

Weather

Wednesday 24 December

2°C

-1°C

0 %

Additional weather tips

Max wind speed: 11.0 km/h

to get more detailed weather forecasts along your route

Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

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

Fosses Pass

Lac d'Ambléon

Departure from Col des Fosses in Appregnin (information panel)

Col de Portes (1010 m)

Portes Pass

View of the Vallée Bleue

Col de Fay

Nearby routes

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