The first official IRONFIST race in Star Citizen is scheduled for Wednesday 2/18/2015, this corresponds to CIG offering the ability to free test fly the entirety of the 300i series for a week starting on Friday 2/13. Qualifiers for the race will be offered on the 16th and 17th.
There are two racing events scheduled, an official S+ tier race as well as an official A tier race.
S+ tier includes the M50, 350r, Mustang Omega and Mustang Gamma.
A tier includes the 300i, 315p, 325a, and Avenger.