May<br>
The Indianapolis 500-Mile Race, often shortened to Indianapolis 500 or Indy 500, is an American automobile race, held annually over the Memorial Day weekend at the Indianapolis Motor Speedway in Speedway, Indiana. "The Greatest Spectacle in Racing" is one of the oldest and richest motorsport events in existence, having the largest attendance and one of the largest radio and television audiences of any single-day sporting events worldwide. While the official attendance is not disclosed by Speedway management, news media estimate attendance in excess of 270,000. The event lends its name to the "IndyCar" class of formula, or open-wheel, race cars that have competed in it. In May 2006, the race celebrated its 90th running and 61st consecutive year of uninterrupted occurrence.
