Fosses Pass – Lac d'Ambléon loop from Innimond

Fosses Pass – Lac d'Ambléon loop from Innimond

Hard

riders

Fosses Pass – Lac d'Ambléon loop from Innimond

03:33

63.3km

1,390m

Road cycling

Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride. The starting point of the route is right next to a parking lot.

Last updated: August 3, 2026

Waypoints

Start point

Parking

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1.43 km

Cerin Peat Bog

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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 …

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5.24 km

Col des Fosses (745 m)

Highlight • Mountain Pass

Pass accessible from Appregnin or Lhuis, located at an altitude of 745 m.

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5.40 km

Fosses Pass

Highlight • Mountain Pass

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

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6.58 km

Lac d'Ambléon

Highlight • Lake

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

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11.4 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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28.4 km

Formentiaz Orientation Table and View

Highlight • Viewpoint

Orientation table which overlooks a beautiful viewpoint, accessible during the ascent of the Col de Ballon.

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36.9 km

Col de Ballon (929 m)

Highlight • Mountain Pass

The Col de Ballon is 14.1km long with an average gradient of 5%, although there is a slight descent at the 11th km which reduces the overall average gradient.

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