For 10 points, name this winter sport in which people descend "slopes" by using poles and a namesake pair of thin planks.
Prominent brands originally founded for this activity include K2 and Rossignol, and participants in it can unconventionally lift their heels in its "telemark" variant. The federation FIS is named for this activity, and a characteristic "V" is produced when (*) jumping in this activity. Beginners in this activity learn techniques like "french fries" and "pizza," and successful American athletes in this sport include Bode Miller and Lindsey Vonn. This is the most popular of the sports that might involve "black diamond" ratings or take place at Aspen. For 10 points, name this winter sport in which people descend "slopes" by using poles and a namesake pair of thin planks.
Prominent brands originally founded for this activity include K2 and Rossignol, and participants in it can unconventionally lift their heels in its "telemark" variant.
alpine skiing (or downhill skiing)