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France

Auvergne Rhône Alpes

Grenoble

Saint-Pierre-De-Chartreuse

Le Grand Som (2026 m) – Col de la Ruchère (1477 m) loop from Saint-Pierre-de-Chartreuse

Routes

Mountain hikes & routes

France

Auvergne Rhône Alpes

Grenoble

Saint-Pierre-De-Chartreuse

Le Grand Som (2026 m) – Col de la Ruchère (1477 m) loop from Saint-Pierre-de-Chartreuse

Hard

hikers

Le Grand Som (2026 m) – Col de la Ruchère (1477 m) loop from Saint-Pierre-de-Chartreuse

07:07

14.9km

1,190m

Mountaineering

Hard mountaineering route. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required. The starting point of the route is right next to a parking lot.

Last updated: October 15, 2025

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Tips

Your route passes through a protected area

Please check local regulations for:

Parc naturel régional de Chartreuse

Waypoints

Start point

Parking

Get Directions

540 m

Viewpoint

4.02 km

Col du Frenay

Mountain Pass

4.65 km

Pas de la Suiffière

Mountain Pass

5.80 km

Le Grand Som (2026 m)

Highlight • Summit

7.67 km

Col de Bonivant (1645m)

Highlight • Other

8.25 km

Col de Léchaud (1,704 m)

Highlight • Other

8.90 km

Pas du Loup (1560 m)

Highlight • Mountain Pass

Be careful, if in summer it is a fairly easy passage, in winter, as the surrounding slopes are steep, it is more prudent to have crampons

Translated by Google •

Tip by

9.38 km

Sous le Petit Som (1530m)

Highlight • Other

9.97 km

Col de la Ruchère (1477 m)

Highlight • Mountain Pass

12.2 km

Le Réservoir

Lake

14.9 km

End point

Parking

Way Types & Surfaces

Way Types

7.06 km

3.26 km

2.78 km

1.55 km

267 m

Surfaces

5.17 km

3.77 km

3.65 km

2.13 km

186 m

Elevation

Highest point (1,970 m)

Lowest point (850 m)

Weather

Today

Monday 1 December

2°C

1°C

0 %

If you start your activity now...

Max wind speed: 1.0 km/h

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

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Le Grand Som (2026 m) – Col de la Ruchère (1477 m) loop from Saint-Pierre-de-Chartreuse

Le Grand Som (2026 m)

Col de Bonivant (1645m)

Col de Léchaud (1,704 m)

Pas du Loup (1560 m)

Sous le Petit Som (1530m)

Col de la Ruchère (1477 m)

Nearby routes

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