[2] The event marked the 29th annual edition of the Toronto Indy, and the tenth round of the 2015 IndyCar Series season.

Josef Newgarden led home teammate Luca Filippi for a CFH Racing 1–2 finish, with the podium completed by Team Penske driver Hélio Castroneves.

Exhibition Place was unavailable in July and August as it will be converted into Pan Am Park, in order to host various games events including beach volleyball, gymnastics and cycling.

[9] An agreement was eventually made to host the race in June following the cancellation of the Grand Prix of Houston, with the Toronto Indy set to return to July for 2016.

Pole driver Will Power held the lead for the first 30 laps, with Simon Pagenaud trying to overtake him several times, until he pitted under the first of the race's two full course cautions, which came out due to James Jakes having minor contact and stalling at Turn 5.

Castroneves held the lead until the second full course caution, when debris from Stefano Coletti's car was left on circuit at Turn 8.