After record attendance and participation last year at host site Vail, Colorado, spots are expected to fill quickly. So if you think you've got what it takes (and you're interested in the $100,000 prize pool), head to to sign up for kayaking, rafting, mountain biking, road cycling, amateur climbing, World Cup bouldering, fly-fishing, trail running, stand up paddling, or a half marathon.
Both pros and amateurs are invited to compete in the nation's largest celebration of mountain sport and lifestyle, taking place June 3-6, 2010.
聽 Images courtesy of Shane Macomber Photography