The Triple Crown is a term sometimes used to describe the three-tiered crown or tiara formerly used by popes. See Papal Tiara

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In sport, a Triple Crown is achieved by winning three specific events, usually in a single season. This includes the following:

• Triple Crown of Aerial Skiing
• Triple Crown of Alpine Skiing
• Triple Crown of Auto Racing - (Formula One World Championship, Indianapolis 500, 24 hours of Le Mans)
• Triple Crown of Cycling
• Triple Crown of Harness Racing for Pacers
• Triple Crown of Harness Racing for Trotters
• Triple Crown in Major League Baseball
• Triple Crown (Rugby Union)
• Triple Crown of Running
• Triple Crown of Snooker
• Triple Crown of Snowboarding
• Triple Crown of Surfing
• Triple Crown of Thoroughbred Racing.
• Triple Crown of Golf - (British Open; US Open; South African Open)

The term has also been applied in the world of entertainment, for winners of a Tony Award, Academy Award and Emmy Award.

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In backpacking, the Triple Crown refers to the three longest north-south hiking trails in the United States: the Appalachian Trail, the Pacific Crest Trail, and the Continental Divide Trail.