Analysing terrain data
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The popular Chassoure - Tortin itinerary is reputed to be the most difficult marked itinerary in the 4 Valleys.
Perhaps because of the giant never-ending moguls! The run is so popular it doesn't really count as a proper freeride terrain but if you want to test your legs, start from Chassoure and follow the fall line down the steep north facing moguls until you joined the groomed track that takes you all the way down to Tortin.