From 01/01 to 12/31.
Height: 710m. Length: 1200m. Excerpt from the "Activités verticales" 2014 edition guide book: Necessary length of rope: 30m (15m minimum) Approach: 10 minutes. Return: 10 minutes. Descent: 3h. Technical advice: no upsteam dam, way-out difficult to access but possible except in the caves' area. Bottom of the canyon: carpark in the turn after Mont Bogon hamlet. Do not park in Vesonne village. Top of the canyon: Area on the right 10 minutes after the oratory by foot. Do not park at the oratory, this space is reserved for drop-offs and emergency services.