You may want to think about using the MTA bus service. It picks up in several places around Salinas, Monterey and Carmel and takes you right into the track free of charge. Check their website for the schedule. Our group enjoys a few beers at the races so the busses are great for getting us back to our hotel safe. We have been going since the 60's and always just purchase General Admission and walk to several different viewing spots around the track.
Everyone have a good time!