I was booking some of my trackdays at Laguna Seca, layed everything out and figured it may be useful for some other forum members. Laguna Seca is unlike the tracks in SoCal that have events all the time. In 4 months there are only like 10 open trackdays so you really have to plan ahead.
http://www.mazdaraceway.com/
Here are the Laguna Seca track days so far as of 2-15-12:
February
Tuesday 21 - Golden Gate Lotus
Friday 24 - Hooked on Driving
March
Monday 12 - Northern California Racing Club
Friday 16 - Audi Car Club
Monday 19 - PDC Racing - invite only
Thursday 29 &
Friday 30 - Trackmasters for auto racing and Z2 Trackdays for motorcycle - combined both days
April
Wednesday 4 - Golden Gate Lotus Club
Thursday 12 - Hooked on Driving
May
Sunday 27 - Bridgeway Motors CFRA
June
Saturday 16 - PCA SVR
Sunday 17 - Trackmasters
Tuesday 26 - Trackmasters
Friday 29 - Speed Ventures
Saturday 30 - Speed Ventures
July
Sunday 1 - Speed Ventures
rest of July is not finalized
July, August, September, October and November are not finalized yet. Recently an even on April 8th was taken off and not replaced, so dates do sometimes change but this is 90%.