http://thekneeslider.com/archives/2010/05/18/catalina-island-grand-prix-returns-in-2010/ looks like fun!
Is it road racing, enduro, sumo or what? The videos in that link were cool, but it looked like it was more of an off road enduro race.
Not a whole lot of details, but here's the group running the show: http://www.district37ama.org/forums/forumdisplay.php?f=4 Sounds like rules and track announcements should be June sometime.