I was wondering if there are any closed circuit race tracks in California where you can pay a entrance fee and you and a couple of friends can get all your cars over there and race together.

You know just getting a couple of friends together, going to a public race track and racing.

I have looked all over Google and have found nothing. Please help.

There are several in Northern CA that I know about. Don't know about Southern CA. Drag or road course?
If you have a car club and some money you can rent out most tracks for a day.

The Infineon Raceway (formally Sears Point Int'l Raceway) offers track rental.
On some Wednesday, there are police officers racing with their patrol cars against high school students.