ALMS is #1 among pro racing in the US. Grand Am is running itself into the ground, just like the other sanctioning body that the owners run, NASCAR. lol
attendance is down, tv viewership is down, merch sales are down. i love it, only another year or two until nascrap falls off the radar and i can get back to watching real racing on speed channel.
i would say that the SCCA has the most competitive road racing you can find and with so many classes you are sure to find cars that you like to watch throughout the day
