The horses gallop down a track roughly in length. Skiers must navigate a series of jumps and gates. At some events, to add difficulty, the skier is also required to grab one or more rings as they ski past a station on the course. On a straight track, the horse runs down the middle of the course with the skier navigating slalom gates and jumps on either side of the track. Some places use a horseshoe-shaped track that allows the horse to run on the inside of the track and the ski jumps are set on the outside of the track for the skier. Jumps are in height, lower on curved tracks or in places where snowboarders wish to compete.