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Le Grand Som from the Col du Cucheron
Walker 
8.74 km
+881 m
-880 m
5h 00
Difficult
Departure from Isère
This is definitely the easiest and shortest way to climb the Grand Som.
Caution for those prone to vertigo: between (2) and (3), the walk becomes a climb in places. The passages are often narrow and can be daunting.