I have skied Zugspitze, Kitzbühel, Arlberg, St. Moritz, Verbier, Zermatt. In the US I skied Tahoe, Snowmass, Park City, and Mammoth. Mammoth mountain, of course, is the closest high alpine ski area to Southern California. I think it is being under appreciated. It is rather high altitude skiing, between 9,000 and 12,000 feet (3,000m- 4,000m). The snow situation is usually fantastic. It can be up to 30 feet (10m). Season can be from October through May. Traditionally they even have 4th of July ski races there. For an American resort it is a quite large area with various skiing experiences. What I like best is that most of the area is above the timber line with very wide and extensive views over the Sierra Nevada snow covered peaks. It reminds me of Verbier and the weather is quite sunny rather than overcast.