I really loved this hike, an amazing view after such a climb is breathtaking. Recommendation for everyone who's in the neighborhood. Best time is in summer when snow level is around or above 3000m. Last kilometer could be slippery when there is still some snow!
Very nice hike with many panoramic views. The lake itself is just one of the most beautiful lakes i've ever seen. From the summit Sorebois you get an amazing view over the valley, recommend it to everyone! At Cabane de Moiry the glacier looks so close. Really beautiful.