Cliimbing to the top of the highest mountain in the EU will probably not count as "winter sports", but as extreme sports. Winter sports will cover skiing and alike, though.
We are arguing about the definition of extreme sports, but for my travel insurance for skiing and kitesurfing I need the "extreme sports" addon. The point is, "extreme sports" depend on the insurer.
Cliimbing to the top of the highest mountain in the EU will probably not count as "winter sports", but as extreme sports. Winter sports will cover skiing and alike, though.