The Reno Air Races, also known as the National Championship Air Races, take place each September at the Reno Stead Airport a few miles north of Reno, Nevada, USA. Air racing is billed as 'the world's fastest motor sport' and Reno is one of the few remaining venues. Begun in 1964, the Reno Air Races feature multi-lap, multi-aircraft races between extremely high performance aircraft on closed ovoid courses which range between about 3 miles (Biplanes and Formula One) and about 8 miles (Jet, Unlimited) in length per lap.

Aircraft in the Unlimited class, which consists almost entirely of both modified and stock World War II fighters, routinely reach speeds in excess of 400 miles per hour. In 2003, Skip Holm piloted Terry Bland's modified P-51D Mustang, Dago Red, and reached an all-time speed record of 507.105 mph in a six-lap race around the eight-and-a-half mile course. The recently added Sport Class racers, mostly homebuilt aircraft,

are already reaching speeds in excess of 350 mph. In 2009, Curt Brown set a record of 538 mph on his L-29 jet Viper.

http://en.wikipedia.org/wiki/Reno_Air_Races