Except for the NW Region, there are contests listed for all the IMAC regions on the IMAC website. In the menu bar at the top, mouse over Regions, then the specific region you are looking for, then select the Contest Schedule link for that region.
http://www.mini-iac.com
You may want to check out the NW Region home page on the IMAC website and use the e-mail link there on the right to e-mail Kevin Miller. He is the NW Regional Director for IMAC, he should be able to help you with finding out what the schedule is for the NW Region.
Regards,
Anna Wood
IMAC SW Region