In which event do skiers descend a slope covered in mounds of snow, making jumps during the descent?

Mogul skiing is a freestyle skiing competition consisting of one timed run of free skiing on a steep, heavily moguled course, stressing technical turns, aerial maneuvers and speed. Internationally, the sport is contested at the FIS Freestyle World Ski Championships, and at the Winter Olympic Games.

Moguls are a series of bumps on a piste formed when skiers push snow into mounds as they do sharp turns. This tends to happen naturally as skiers use the slope but they can also be constructed artificially. Once formed, a naturally occurring mogul tends to grow as skiers follow similar paths around it, further deepening the surrounding grooves known as troughs. Since skiing tends to be a series of linked turns, moguls form together to create a bump field.

The term "mogul" is from the Bavarian/Austrian German word Mugel, meaning "mound, hillock".

Mogul courses are between 200 and 270 metres with an average slope grade of 26 degrees. The moguls themselves are set approximately 3.5 metres apart. The course includes two small jumps which are used as a take-off for aerial maneuvers. Athletes can perform upright or inverted tricks off these jumps in the course of a competition run. Dual Mogul competition consists of elimination rounds where pairs of competitors compete against each other. Each loser is eliminated and each winner advances to the next round until a final result is achieved.