Coming From San Francisco/Oakland
Take Interstate 580 east through Livermore and over the Altamount pass
Take the Interstate 205 exit after the Altamount pass, stay to the left, this will take you through Tracy
Interstate 205 will empty into Interstate 5 just before the Highway 120 exit towards Manteca
Stay to the left once you are on Interstate 5 and pass the Manteca/120 bypass
Now you should be on Interstate 5 heading north