November thru March is $2 per car. April thru October is $2 per car on weekdays and $3 per person on weekends and holidays.
For us who are chronologically enhanced (i.e., olde phartes), you can purchase a Golden Age Pass which will give you free entrance to the park for the rest of your (un-)natural life. I believe I had to pay a $10 fee a couple of years ago to get mine.
Thanks! Your answer is awaiting moderation.