Berkeley Marina: From Sacramento area:
Take 1-80 to San Francisco .
When you reach Berkeley, Turn off on University Ave (west)
Right on Marina Blvd.
Turn left at Spinnaker Way.  
 

Martinez Marina: From Sacramento area:
Take 1-80 to San Francisco.
Take the I-680 ramp to Benicia/San Jose, merge into I-680 S.
Take the exit to Marina Vista/Martinez.
Turn left at Marina Vista Ave.
Turn right at Ferry ST.
Bear right at Joe Di Maggio Dr, Bear left at N Court ST.