The Monterosa Ski is an Italian ski resort, which links three valleys. located largely in the Aosta Valley and the remainder in Piedmont. Much of the area consists of easy and intermediate skiing, but the area around the Passo dei Salati is a major destination for freeride skiers and snow-boarders.

The area takes its name from Monte Rosa as the heads of its three constituent valleys are located within the Monte Rosa massif. These valleys are the Val d’ Ayas and the Val de Lys located within the Aosta Valley and the Valsesia in Piedmont.

There are approximately 180 km of ski slopes (almost all equipped with snow-making), from the most simple to the more technical (19 blue runs, 41 red runs and 6 black runs, including, Gressoney-Saint-Jean, the most difficult in the Valle d’ Aosta region), and 38 lifts that start at a minimum altitude of 1212 m above sea level (Alagna) and reach up to 3275 m s.l.m. at Indren. The overall uplift capacity of the lift system is about 50,000 people per hour. The Valsesiana part of the district is known for its many off-piste skiing and ski mountaineering.