The activity is located halfway between Flaine Forêt and Flaine Forum, at a place called "La cascade". It is located under a sheltered firing range.
You can get there on foot from Flaine Forum by taking the footpath in front of the aquatic centre, then a path through the forest. From Flaine Forêt, you can get there by crossing the whole of Flaine Forêt and the Bissac area.
Coming by car? Access by car is not possible, only on foot. The nearest car park is P3, just to the left of the Flaine Forêt entrance.