The track was originally 1.9 miles long. In 1986 the track was lengthened to to 2.214 miles by adding an infield section between turn 2 and turn 3. The current turns 3 and 4 are new, and the old turn 3 became turn 5.
In 1996, the track became 2.238 miles long when a new turn ten pit entrance was built. Turn 10 was made into a sharper turn, and turn 11 was moved up, making the front straight slightly longer than before.