Fortunately (or was it?) I was going south when they were going north and I headed back north when they were going south.
I'm going to go out on a limb and say I don't care for organized events using the river trail. There are little kids roller-blading, dogs, walkers, joggers and no shortage of recreational cyclists, and then you get the morons on TT bikes blasting through with as little concern for the rest of us as possible. I will say that only seemed to be a problem for the blokes at the front, most of them were pretty reasonable; it was just crowded.
Another river trail peeve - why do dog owners have to clean up after themselves but horse owners leave their immense piles of horse poop in the middle of the trail?
And last: PSA: the underpasses were a little treacherous with loose sand right where it was hard to see and right where you need to turn to stay in your lane. (Obviously this was more of a problem with today's crowds). Ride safely!