From WorldHeliChallenge on YouTube:

“The World Heli Challenge is an elite level heli-accessed free ride event held over a two week weather window in Wanaka, New Zealand, deep in the heart of the South Island. Join 22 skiers and snowboarders from around the globe as they revel in the Southern Alps and take on everything the local area has to offer including river surfing, south coast surfing, mountain biking and plenty of fun times.”