Depends on the event you want to attend. You pay the event organizers and in turn they pay the track for the exclusive rental for the event. You can always rent out the track and do what you want but that is by no means cheap, easily upwards of a $1000 a day. Just go to their calendar and look for drift events and get in contact with the group running said event and pay their entry fee.
Or you can go here and look for an event as a lot of them get posted in this section.
http://zilvia.net/f/south-western-states/