From Highway 1 southbound:
Exit Reservation Road
Turn Left on Reservation Road (go under the freeway) (go about 1/4 mile)
Turn Right to stay on Reservation Road (go another 1/4 mile)
(if you go straight, you'll be on Beach Road)
After you cross the railroad crossing, the next intersection is Reservation Road and Del Monte Blvd.
Go straight through the intersection (crossing Del Monte Blvd).
Jack in the Box will be on your left hand side.
Park in the parking lot adjacent to Jack in the Box.

See you Saturday at 10:00 AM!!

Edited for clarity (I hope it is clearer!)
When you exit Highway 1 you will turn Left on Reservation Road.
You will stay on that road for about 1/4 mile.
Then you will turn Right to stay on Reservation Road.
Stay on that part another 1/4 mile.

I am navigationally challenged! Sorry!