Shootout is pretty bad ass, and huge in the right weather. But after the warm-up is over most of the group is gone and the ride is so smooth and easy, some serious high speeds coming back old nogales though.
That said, the acacia rides (both sat. and sun.) in colorado springs are smaller and faster and much more vicious most times of the year.
Nyack is a moderately paced group ride, at least in summer. Sorry, Pcad, but that ride is just not long enough or fast enough, sure has got enough change of pace though.