which one is the closest to los angeles?? and how much to race there? any special equipment that is required?? or anything that I should have?

and there is a track even coming up really soon. check it out.

are also pretty close.

check out SpeedTrialUSA and Tracquest. They both put on events at local tracks.

i've been to 3 Speedtrial events and they're a lot of fun. A little less structured than Audi Club events.

usually all you need is a helmet (SA 95 or better) and to pass a tech inspection (which with a relatively new car is a breeze)