This just made it up on the calendar yesterday, but the UC Berkeley MTB racing team is holding a multi-day / multi-site / multi-race event this weekend:
- XC and Super D at Lake Sonoma on Saturday, 10/2/10
- Dual Slalom and Short Track XC at Bailey Bike Park (Pittsburg, CA) on Sunday, 10/3/10
I believe that both events are open to both collegiate and USA Cycling racers. The full details are available on this flyer [PDF].
They've also created a short promo video: