All of the season's events are posted to MotorsportReg.com
Here you can see the complete calendar of events and register for an event.
The registration for each weekend's set of events opens approximately 10 days before the event, and registration closes at 5pm the Thursday before the event.
All Boise Autocross events are online registration only! There is no on-site registration.
(Event schedule is updated at the beginning of each season)