Sarenne, Alpe d'Huez
A total of 87 ski lifts serve the Grandes Rousses ski area. If you don't want to sit on them the whole day, take the Pic Blanc cable-car up to 3,330m and you will be able to ski for almost an hour and a half without having to get your pass out again. Alpe d'Huez has it all, from some of the ideal beginners' slopes in France to some of the more challenging blacks in the Alps. For a mixture of the two, go for the longest black run in the Alps, the Sarenne, which extends 16km from the top of the glacier and shifts gradient from nearly vertical to practically horizontal throughout the 2,000m descent. It's a run which can be taken on by any competent intermediate, particularly now there's an easier route down the steepest part, and it's well worth the trek up as it's undoubtedly one of the most beautiful and memorable runs in the Alps.