If most popular means most visitors it's Les 3 Vallées.
There are a couple of popular ski slopes in Canada. Some of those ski slopes are located at the following resorts: Kicking Horse Resort, Fernie Alpine Resort, and Red Resort.
4 Vallées.
La Tania is part of Les 3 Vallées which is, counted by the numbers of visitors, the most popular ski resort in the world.
The Heavenly Ski Resort is located at lake Tahoe near the California and Nevada border. Heavenly Ski Resort is one of the most popular winter ski resorts in the United States.
If most popular means most visitors it's Les 3 Vallées.
If most popular means most visitors it's Les 3 Vallées.
Skiing is much more popular. In Europe where most skiing is done are the snowboarders just a few percent of all people in a ski resort.
The Risoul area of France is most commonly known for its mountains and snow conditions. There is a ski resort located there which is the most popular ski resort in France.
Paradiski.
By counting number of visitors it's Dolomiti Superski.
I don't know if it is the biggest but most famous for it's spas is Badgastein which have had spas for hundreds of years.
The name of the most famous ski resort in Chile is called Ski Portillo. However, there are also other popular ski resorts in Chile. For example, Valle Nevado and El Colorado are also quite famous.