What is the length of one lap at the Indianapolis Motor Speedway?

One lap around the Indianapolis Motor Speedway’s famous oval is 2.5 miles.

The oval consists of four turns connected by two long straightaways and two shorter chutes. Its basic layout dates to the speedway’s construction in 1909, when founders designed the circuit as a testing and competition facility for the growing automobile industry in Indiana.

The Indianapolis 500 is named for its total race distance rather than its lap length. Because each lap is 2.5 miles, the traditional race distance of 500 miles equals 200 laps. That arithmetic is one of the defining facts of the event and explains why the race can last several hours despite the compact oval layout.

The speedway is also known as “The Brickyard.” Its original surface was covered with approximately 3.2 million bricks in 1909 after the first paving material proved unsuitable. Most of those bricks were later covered by asphalt, but a narrow strip remains at the start-finish line. The infield road course is different from the oval and has its own length, so “2.5 miles” specifically describes the historic oval used for the Indianapolis 500.