SCCA Racing Trivia Question

[Group44TR7@aol.com]

       What are the current race tracks that have the longest histories of 
having SCCA (national and/or regional) race events on an annual basis? (I do 
not 
know the answer, that is why I am asking)

       Secondly, I understand there is a recent book released on the 
Riverside racetrack. I am not having much luck searching with google, so I 
assuming 
that I not using the right words in my query.

       Happy holidays to all.

Cary