Downhill is an alpine skiing discipline. The rules for the Downhill were originally developed by Sir Arnold Lunn for the 1921 British National Ski Championships. "Downhill skiing" is a commonly used term that is synonymous with "alpine skiing" to denote the sport and recreational activity of alpine skiing.
The Downhill discipline involves the highest speeds and therefore the greatest risks of all the alpine events. Racers on a typical international-level course exceed speeds of 130 km/h (81 mph) and some courses, such as the notable Lauberhorn course in Wengen, Switzerland, and the Hahnenkamm course in Kitzbühel, Austria, speeds of up to 150 km/h (93 mph) in certain sections are common. The 100 mph barrier was broken by Johan Clarey at the 2013 Lauberhorn World Cup race beating previous record of 98mph, set by Italian Stefan Thanei in 2005. Competing in the Downhill event requires skiers to perfect an aerodynamically efficient (tuck) position to minimize drag and increase speed. This contrasts to the technical expertise required in lower speed slalom events (Super G, Giant Slalom & Slalom) where turns are progressively more emphasized.
A typical Downhill course begins at or near the top of the mountain on a piste that is closed off to the public and groomed specially for the race. Gates are farther apart. The courses in the world's most notable ski areas are well-established and do not change a lot from year to year.
The course is designed to challenge the best skiers in a variety of ways: skiing at high speeds, through challenging turns, shallow dips, flats, and small airs (jumps). A good course will have all these elements in it, as well as some jumps intended to complicate matters and thrill both the racer and the spectators.
Equipment for the Downhill is different from the alpine events that are lower-speed. Skis are 30% longer than those used in Slalom, for more stability at high speed. They usually have rounded, low-profile tips rather than pointed tips. Ski poles are bent so as to curve around the body as the racer stays in a "tuck position" and may have aerodynamic, cone-shaped baskets. As in other alpine disciplines, Downhill racers wear skin-tight suits to minimize drag, and helmets are mandatory.
In an attempt to increase safety, the 2003-2004 season saw the FIS increased the minimum sidecut radius for Downhill skis to 45 metres (148 ft) from 40 metres (130 ft), and impose minimum ski lengths for the first time: 215 centimetres (7.05 ft) for men, and 210 centimetres (6.9 ft) for women.
In all forms of Downhill, both at a local youth-level as well as the higher FIS international level, racers are allowed extensive preparation for the race, which includes daily course inspection and discussion with their coaches and teammates as well as several practice runs before the actual race. Racers do not make any unnecessary turns while on the course, and try to do everything they can to maintain the most aerodynamic position while negotiating turns and jumps.
Unlike Slalom and Giant Slalom, where racers have two combined times, in the Downhill, the race is a single "run." Times are typically between 1:30 (1 minute, 30 seconds) and 2:30 for World Cup courses and must be over 1 minute in length to meet international minimum standards. Tenths and hundredths and, occasionally, thousandths of seconds count: World Cup races and Olympic medals have sometimes been decided by as little as one or two hundredths of a second, and ties are not unheard of.
The most successful all-time winners of World Cup Downhill races are Annemarie Moser-Pröll of Austria (36 wins, 7 women's titles) and Franz Klammer of Austria (25 wins, 5 men's titles). Lindsey Vonn of the U.S. is currently dominant in woman's downhill racing with a lifetime total of 25 World Cup downhill wins.
Safety netting and padding are placed in worrisome areas where race officials anticipate crashes. Despite these safety precautions, the ski racing community is well aware of the inherent risks in Downhill skiing, for it is possible for racers to suffer serious injury or death while practicing or competing. Three Downhill-related deaths on the World Cup in recent years were those of Austrians Ulrike Maier in 1994 and Gernot Reinstadler and Frenchwoman Régine Cavagnoud in 2001. Also in 2001, Swiss downhiller Silvano Beltrametti was paralyzed in a high-speed crash.
See also 
- Alpine skiing combined
- Giant Slalom
- List of men's World Cup Downhill title winners
- List of women's World Cup Downhill title winners
- List of Olympic medalists in men's Downhill
- List of Olympic medalists in women's Downhill
- List of Paralympic medalists in men's Downhill
- List of Paralympic medalists in women's Downhill
- List of World Champions in Downhill
- Skiing and skiing topics
- Super Giant Slalom (Super G)
- U.S. Ski and Snowboard Association - National governing body for Olympic skiing and snowboarding in the United States
- First Tracks!! Online Ski Magazine (October 11, 2011). Canadian Ski Racers Train in Wind Tunnel.
- FIS Alpine Skiing - Competition.
- "Alpine Education Guidebook - Boo". Skidome.org. Retrieved 2012-08-06.
- International Ski Federation (FIS). Biography: Annemarie Moser-Pröll. FIS Legends. Retrieved on: 2011-12-27.
- International Ski Federation (FIS). Biography: Franz Klammer. FIS Legends. Retrieved on: 2011-12-27.
- International Ski Federation (FIS). Biography: Lindsey Vonn. FIS Legends. Retrieved on: 2011-12-27.
- The Australian (December 05, 2011). Lindsey Vonn wins 23rd World Cup downhill in Canada. Retrieved on: 2011-12-27.