They always do this on the 1st day of the year rain, snow or shine. I bet it will be crazy busy this year, since it is supposed to be dry. It's fun to see all the bikes, and heck it ends in pizza. How bad can that be?

They jump in the river here too. My band played a benefit for a guy last year who was doing the polar bear plunge for Special Olympics. I love to swim, but forget that.
