Although not really a race (or NorCal for that matter), this weekend is the annual Kernville Fat Tire Festival down near Bakersfield, CA:
Kernville is where it's at for our 19th annual Kernville Fat Tire Festival staged over three days, October 22, 23 and 24, 2010. Come join us for one, two or three days of total immersion in biking activities for all riding abilities. Bring your riding club or come to meet other riding enthusiasts, just like you.
The town of Kernville uses the Sequoia National Forest for a playground, come play with us!
Via Kernville Fat Tire Festival website.