D-shaped, two-mile oval
18 degree banking in turns
12 degrees on front straight
5 degrees on back straight
73 feet wide with 10-foot apron in turns
45 feet wide with 12-foot apron on straightaways
Backstretch is 2,242 feet long
Front stretch is 2,229 feet long
Pit lane is 50 feet wide and contains space for 44 individual pit areas
 

When Michigan International Speedway opened in 1968, the 12,000-seat center grandstand stood overlooking the new two-mile oval, a symbol of a new era for the Irish Hills area. With smaller grandstands on each side, the track proudly boasted 25,000 seats.
No one at the time suspected it was the start of something much, much bigger.

Since its opening, the success of the speedway and the growth of motorsports has made Michigan International Speedway the largest sports arena in Michigan. The center grandstand was extended in 1985, in 1989, and again in 1990 to seat over 27,000. In 1999, a 28,000-seat, 10-1/2-story high structure was added to the center grandstand, increasing the number of seats to 55,000-more than four times its original size.

In 1990, the first of two of the seven grandstands in turn one were erected, and in 1992, the first North Concourse grandstands (turn four) were built. By 1997, the eighth North Concourse grandstand was built in turn three.

Over the last decade, Michigan International Speedway has increased its reserved seating capacity by 82,000, and since 1985, the Speedway has increased its seating by nearly five times.

After more than 30 years of improvements and updates, Michigan International Speedway is still considered one of the country's premier racing facilities.