Wow, why would SIR close, this is when everyone hits the track in AZ
Here is the link to Firebirds and Speedworlds Sites.....look at there schedules there both open during the winter, but Firebird closes for a month or so.
http://www.firebirdraceway.com/03pag...treetdrags.htm
http://www.speedworldmotorplex.com/schedule.htm
HTH
Jamie