The Dou des Lanches is a headland in the middle of the valley of Tarentaise and a great viewpoint to Mont Blanc (better than La Saulire). Remember to tie the cache up again to its support, storms can be violent to the pass, and the wind carry the cache. I thought about short persons, I put a piece of ladder near the cache 
. You can remove the wood piece if you have trouble accessing the box.