Doug Pensinger/Getty ImagesKelly Clark looks to clinch the 2012-13 halfpipe championship in Vail.
The women conclude their World Snowboard Tour season this week at the five-day Burton U.S. Open in Vail, Colo., and the overall champion, slopestyle champion and halfpipe champion will be crowned. Heading into the Open, eight Americans are in the top 11 of the halfpipe standings. Kelly Clark, 29, sits on top, just ahead of Arielle Gold, 16. Despite the 13 years separating the two Americans, they each earned X Games podium spots earlier this year in Aspen, taking first and third, respectively.