The Firestone Twin 275s were the sixth and seventh races of the 2011 IZOD IndyCar Series season.
The second race grid positions were determined by a random draw.
Hamilton would be entered into the 2011 IZOD IndyCar World Championship at Las Vegas, however the race would be red flagged due to a huge crash that claimed the life of two time champion Dan Wheldon.
As of the 2022 IndyCar Series, this was the last time that two races took place on the same day, as none have happened since.
The next time this would happen would be the 2015 Toyota Grand Prix of Long Beach.