The 2007 IRL IndyCar Series began with a night race on Saturday March 24 at Homestead-Miami Speedway. The season's premiere event, the 91st Indianapolis 500 was held on May 27. The season finale was held at Chicagoland Speedway on September 9. Dario Franchitti won four races during the season, including the Indy 500, clinched the 2007 IndyCar Series championship after he won the final race of the season at Chicagoland Speedway, after points leader Scott Dixon ran out of fuel in turn 3 of the final lap.

The 91st Indianapolis 500 was held at the Indianapolis Motor Speedway in Speedway, Indiana on Sunday May 27, 2007. It was the twelfth Indianapolis 500 sanctioned by the Indy Racing League and the fifth race of the 2007 IndyCar Series season. Hélio Castroneves started the race on the pole position.