Imagine bright, white snow, gently covering a mountain. Now imagine all that snow black, dirty. Melting hard ice, covered by an accumulation of pollution and dust from air. This is reality.
By the way, I can recommend once again the Spa Neu-Hintertux hotel. It is such a friendly place. Their pool are is wonderful, on the top floor with large windows giving a view to the forest-covered mountains around. And the saunas are even nicer: four different saunas, including a very hot Finnish-style sauna.
Further down in the slopes there's really only dark ice underneath. And it is difficult to distinguish the slope from the equally grey rock fields next to it.
The pool area at the spa hotel: