webdigging ... here's the track's web site: [www.racesonoma.com]

Look over the schedule and decide for yourself. What I see suggests that nothing else has the potential draw of the NASCAR event. Only the Indycar race might rise above the general noise level. In the US auto racing world there's NASCAR and then there's everything else - NASCAR is probably bigger than the others put together.

If Key (I think they were the operator) thinks they can make money on one of the other races, they might try to run a train. Again, given the relative popularity of the series, I doubt the non-NASCAR events will qualify.