Chloe Kim, 15, repeated as X Games halfpipe champ, while six-time winner Kelly Clark was fifth, her worst result in nine years.
Kim, who was too young for the Sochi Olympics, scored 95 points in her second run after falling in her first in Aspen, Colo., on Sunday.
Clark had trouble landing 1080s, falling on her third and final run as the last rider attempting to dethrone Kim.
Olympian Arielle Gold finished second with an 86-point run. Clark posted 74. Full results are here.
Last year, Kim overtook Clark in her final run to become the youngest Winter X Games champion ever at age 14 (a record surpassed in women’s ski slopestyle this year). That snapped Clark’s four-year winning streak at X Games.
Clark, 32, earned Olympic gold in 2002 and bronze in 2010 and 2014.