My dad and I go to the TT races every year here in Springfield (home of the fastest dirt mile in the world). It's as good as racing gets in my opinion - the track is short and tight enough that the riders literally bang bars the whole way around the track. I think they hit about 80 mph peak.
Now on the mile track where they hit 130+ in the straights is just nuts - those guys have balls the size of basketballs. I also think it's cool that the old guys can still compete - Jay Springsteen is in his late 40's or older and would still make a decent showing as of just a couple of years ago.