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Road cycling routes

Auvergne Rhône Alpes

Pont du Diable Cave – Sommand loop from Onnion

Road cycling routes

Auvergne Rhône Alpes

Pont du Diable Cave – Sommand loop from Onnion

Hard

5.0

(5)

112

riders

Pont du Diable Cave – Sommand loop from Onnion

02:46

43.2km

1,260m

Road cycling

Hard road ride. Very good fitness required. Some segments of this route may be unpaved and difficult to ride. The starting point of the route is right next to a parking lot.

Last updated: June 27, 2026

Tips

Temporary access restrictions

Includes segments with temporary access restrictions.

After 23.5 km for 5.84 km

Open: • June-August (otherwise closed)

Waypoints

A

Start point

Parking

Get Directions

1

8.36 km

Lac d'Anthon

Highlight • Lake

Road along Lake Anthon.

Translated by Google •

Tip by

2

8.59 km

Lake Anthon

Highlight • Other

Natural mountain lake located at an altitude of 970m. It is allowed to swim. Due to its proximity to Mieussy, you may be able to see paragliders passing overhead.

Translated by Google •

Tip by

3

10.4 km

Pont du Diable Cave

Highlight • Cave

The blessing of this grotto took place on October 6, 1940. The statue of Our Lady of Lourdes was carried in procession from the church. It was erected in gratitude to Notre Dame for her protection of the Parish against the bombardments and for the Mieusserands soldiers.

On August 15, the parishioners go to pray at the grotto where the Mass of the Assumption is sometimes celebrated.

Translated by Google •

Tip by

4

11.9 km

Start of the Col de la Ramaz climb from Mieussy

Highlight • Other

Panel indicating the data for the ascent of the Col, which marks its starting point.

Translated by Google •

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5

21.3 km

The tunnels of Col de la Ramaz

Highlight • Structure

On the climb to the Col de la Ramaz, there are a series of tunnels built into the mountainside. The perspectives on the landscapes are striking. However, be careful if you take this route because the tunnels are not all lit.

Translated by Google •

Tip by

6

22.7 km

Sommand

Highlight • Other

Point d'intersection Sommand Altitude 1415m

Tip by

7

26.4 km

Col de la Ramaz

Highlight • Mountain Pass

The Col de la Ramaz from Taninges is 15km long with a total drop of 983m. The average gradient is 6.5% with maximum gradients of 10.5%.

Translated by Google •

Tip by

8

29.4 km

Sommand

Highlight • Other

Hamlet and small ski resort at the top of the Col de la Ramaz, which offers a pleasant landscape and flat area with a lake and a vast expanse.

Translated by Google •

Tip by

B

43.2 km

End point

Parking

Way Types & Surfaces

Way Types

40.9 km

1.49 km

534 m

222 m

< 100 m

Surfaces

42.6 km

399 m

175 m

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Elevation

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (1,610 m)

Lowest point (600 m)

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Weather

Powered by Foreca

Saturday 27 June

33°C

18°C

0 %

Additional weather tips

Max wind speed: 8.0 km/h

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