As you get off the Dou des Lanches chair turn right immediately and go back on yourself between Le Roc restaurant and the liftie hut. Rather than heading back down under the lift veer left (there will often be tracks already there) about 30 degrees and head over a small rise and keep to the left of the hut. As you pass the hut you'll follow along the ridge of the Dou des Lanches face. The further you go the less tracked it will be but there are four faces separated by three spines that you can ride down. The spines are all difficult and should be taken slowly first time till you get to know them and the two furthest faces also require sensible navigation. The top section is about 150 vertical metres and out of sight of the chair lift but as you come out from between the spines there is an open powder field that shallows out from which you can head right towards the Dou des Lanches black run and chair. Cut right fairly early after you come out into the open field to avoid the cordoned-off grouse hibernation area which is almost always untracked but skiing it is strictly forbidden.