The St Moritz area has five major holiday resorts in the immediate vicinity, which can all be accessed by a general ski pass. Due to the altitude of between 5,906ft and 10,827ft (1,800m to 3,300m) the area is fairly snow sure, but there are also extensive snowmaking facilities available. St Moritz is ideal for intermediate skiers and snowboarders, with about 70% of the terrain suited to the intermediate level with a wide variety of slopes and degrees of difficulty.Each of the four larger mountains also has challenging terrain for advanced skiers, a favourite being the famous Diavolezza-Morteratsch Glacier and the long steep runs from the summits of Lagalb and Diavolezza. The Corviglia-Piz Nair ski area is the most convenient and can be accessed by foot from most hotels in St Moritz.Piz Nair is the highest skiable peak in the area at 10,030ft (3,057m) and is suited to more advanced skiers and snowboarders, while Corviglia has many broad intermediate runs. Corviglia is also the most versatile area for all abilities with slopes high up for beginners. The St Moritz Ski School for skiers and boarders is ranked as one of the top in the world with highly trained instructors for all levels.