Indianapolis Motor Speedway race results

Race results from the automobile and motorcycle races contested at the Indianapolis Motor Speedway in Speedway, Indiana. Races have been held on six different track configurations:

Oval (1909–present): 2.500 miles; 4 turns; counter-clockwise.
Automobile Road Course (2000-2007): 2.605 miles; 13 turns; clockwise.
Motorcycle Road Course (2008–2013): 2.621 miles; 16 turns; counter-clockwise.
Automobile Road Course (2009–2013): 2.534 miles; 13 turns; clockwise.
Automobile Road Course (2014–present): 2.439 miles; 14 turns; clockwise.
Motorcycle Road Course (2014–present): 2.591 miles; 16 turns; counter-clockwise.

On four race weekends in 1909 and 1910, a total of 82 automobile races were held, with lengths varying between 5 and 250 miles. Of these, 17 were of distance of 20 miles or more. None of the short races served as a qualifying race, or "heat" race, for the longer events. Each race stood on its own, and awarded its own trophy. All 82 races were sanctioned by the American Automobile Association (AAA). The 1909 races took place on the original crushed stone and tar surface. As the weekend progressed, the track surface began breaking up badly, and the final race of the weekend, scheduled for a 300-mile length, was shortened to 235 miles. The next scheduled weekend of auto races, planned for early October, was canceled so the track could be repaved. The track was paved in brick during the fall of 1909. Over two days in December, several automobile and motorcycle racers conducted speed exhibitions, in extremely cold temperatures. No races had been planned for that event. The next races were run over three holiday weekends in 1910.

The Indianapolis 500, introduced as the International 500-Mile Sweepstakes in 1911, has been held on Memorial Day, or the Memorial Day weekend, every year since (excluding six years during the World Wars). The race has been sanctioned by the American Automobile Association (AAA) from 1911 to 1955, by the United States Automobile Club (USAC) from 1956 to 1997, and by the Indy Racing League (IRL) from 1998 to the present.

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