Leave the Bellevue cable car station and skin easily up Mont Lachat's West ridge. It is possible to skin up the train tracks of the Tramway du Mont Blanc and then up onto Mont Lachat's summit from this, but taking the West ridge is more aesthetic and enjoyable, albeit slightly tougher physically.

From the summit, ski wherever looks best/safest to the north-east. The exact line you'll take can vary but all are 30 - 40 degrees and provide fantastic skiing high above the Chamonix Valley. All routes lead you naturally down to a small plateau, just above a deep north-east facing gully. Drop into this gully and follow it down on the left bank, picking your exact route according to where the snow looks best/thickest. If the snowpack is not deep enough then negotiating the gully will be extremely arduous, but provided there is enough snow then there is a lot of fun skiing to be had in it. Be aware that all the way down the gully there are huge funnels and gullies above and right of you so even in stable conditions, don't spend any more time skiing the gully than is necessary.

Eventually, as the gully begins to mellow and widen, cross over to the right and get onto the jeep track which descends through forests down to the top of the small beginner's slope in Les Houches. Blast down the slope to the Avenue des Alpages, from where you can access the Chamonix bus system.