The chalet has good access to sport climbing (bolted) routes, via ferrata, and alpine climbing.
A very nice climbing crag in a fantastically beautiful spot is the Rocher des Aravis, a short drive up the col des Aravis. There's a fairly challenging via ferrata nearby on the Paroi de Borderan. They both share the same car park a couple of bends down past the top of the col des Aravis. There is another small climbing crag at Crest-Volant (drive down the gorge towards Ugine a couple of miles, take the turn for Crest Volant after a couple of miles, the car park is a couple of bends up the hill). You can also walk/scramble up Mont Charvin which has a section protected by via ferrata. The walk from the lake on the Clusaz side is an easy walk except for some exposure at the end, the routes from the east and south are trickier. If you look on youtube under Rocher des Aravis, via ferrata Yves Pollet-Villard, Escalade Mont Charvin you will get the picture. Email me for topos.
For all kinds of mountain adventures, head to the Mont Blanc Massif. It's easy to do a day trip using the Aiguille du Midi or the Pointe Helbronner cable cars. These are the two cable cars up to the Glacier du Geant on the Mont Blanc massif. Pointe Helbronner is on the Italian side, avoids the exposed ridge walk out of the Aiguille du Midi lift, and is just over an hour's drive from the chalet.If you need a guide we recommend Krister, who is friendly, helpful and safety conscious as well as being one of the best climbers in Europe.
Via Ferrata gear is widely available to rent locally, including la Giettaz on the way up to the col des Aravis. Soquet Sports near the tourist office in Megeve are very professional and rent a variety of mountaineering gear.