Competitors take off from the halfpipe's rim, performing challenging aerial maneuvers, including flips, twists and spins. They complete each trick by traveling back and forth between the halfpipe's walls. Athletes complete two runs.
The event takes place in a semi-circular ditch, or half of a pipe, dug into the surface of a hill. The halfpipe is typically 110 meters long with 3 to 4 meter deep vertical sides, each on an 85 degree rounded slope. The width from wall to wall is 13 meters to 15 meters.
The format for the men and women's event is the same.
Parallel Giant Slalom
Two competitors race simultaneously side by side down two courses. They take two runs, switching sides after the first one. The setting of the courses, the configuration of the ground and the preparation of the snow must be as identical as possible. The format is the same for the men and women's event.
The vertical drop of the course must be between 120 meters and 200 meters. The number of turns should be equal to 11 percent to 15 percent of the vertical drop in meters.
Athletes must navigate around gates, which are 20 meters to 25 meters apart.
A gate consists of two poles - one outside pole and one turning pole. Triangular banners are fastened between the poles so lower edges of the flag touch the snow. The banner is 110 cm tall on its long side and 25 cm tall on the short side; its base length is 130 cm. One course has red banners and the other blue. Competitors can choose their own line between the gates.
The parallel giant slalom will be replacing the giant slalom event contested at the 1998 Winter Games in Nagano, Japan, which marked snowboarding's debut as a competitive sport at the Olympics.