The Hoopa Hillclimb is coming up in July. I went last year as a spectator and had a BLAST! It's a long trek up north to the event, but well worth the drive. If you're an old hand at AX/Track time, come try something new and race up the hill. Register early, the event is quite popular.
Pictures and Info from last years Hoopa Hillclimb
Official Site
Video From 2006