Indianapolis 500 Fast Facts

Fans watch as cars go through Turn 1 during the Indianapolis 500 auto race at Indianapolis Motor Speedway, May 30, 2021, in Indianapolis.

(CNN)Here's a look at the Indianapolis 500, known as "The Greatest Spectacle in Racing."

May 30, 2021 - Helio Castroneves wins the 105th running of the Indianapolis 500 in front of approximately 135,000 fans, about 40% of the Indianapolis Motor Speedway's capacity. It is Castroneves' record-tying fourth career win at the track.
August 23, 2020 - Takuma Sato wins the 104th Indianapolis 500. The race takes place with no fans in the stands due to the coronavirus pandemic. Sato also won in 2017.

Other Facts

During the race, the cars attempt to complete 200 laps around the 2.5-mile track, equaling 500 miles.
The track's current dimensions are much the same as when it was constructed in 1909.
The race is among the world's best-attended single-day sporting events. It drew crowds of over 400,000 during the 1990s.
Currently 33 cars start the race in rows of three. In the past there have been as few as 21 (1916) and as many as 42 (1933).
Four drivers have won the race four times: Foyt Jr. in 1961, 1964, 1967 and 1977; Al Unser Sr. in 1970, 1971, 1978 and 1987; Rick Mears in 1979, 1984, 1988 and 1991; Helio Castroneves in 2001, 2002, 2009 and 2021.
The youngest winner is Troy Ruttman. He was 22 years and 80 days old when he won in 1952.
The oldest winner is Unser Sr. He was 47 years and 360 days old when he won in 1987.
Race record time (200 laps/500 miles) - Tony Kanaan, May 26, 2013; 2 hours, 40 minutes and 3.4181 seconds; average speed was 187.433 mph.

Timeline

1906 - The Indianapolis Motor Speedway is founded by Carl Fisher.
February 9, 1909 - The Indianapolis Motor Speedway track is built when 328 acres of farmland northwest of downtown Indianapolis are purchased by Fisher and his partners Jim Allison, Frank Wheeler and Arthur Newby.
August 19, 1909 - The first automobile race takes place at the Indianapolis Motor Speedway. Twelve thousand people are in attendance.
1911 - The first Indianapolis 500 takes place, with Ray Harroun winning in 6 hours, 42 minutes and 8 seconds. The race has been held annually since 1911, except for the war years 1917-18 and 1942-45.