The 14th Annual Cool Mountain Bike Race has been set for March 12th, 2006 near Auburn, CA (actually Cool, CA although it isn't even marked on google maps). The race is a cross country (XC) race through the Sierra Foothills on the Olmstead Loop Trail. The trail is part of the extensive trail system near/in Auburn State Recreational Area.
Although the date is different every year, I've never seen a picture of this race where it wasn't completely frickin' pouring rain. I'll have more information about this race as the date draws near.
UPDATE (03/13/06): Check out the race photos and results.