I did run it once, my qualifying time then was sub 2:50, truly a runners heaven. The festivities that surround Boston were really spectacular, I was fortunate, a buddy of mine lived in Altaborough(spelling) on the outskirts of Boston so I had time to drive the course and see the hills at the 22 mile marker. The marathons that I've run, none are as loud as going through Wellesley college(Boston) the running lane was maybe 6 feet wide and the girls screaming and cheering was deafening. If you have the opportunity to run Boston you will not be disappointed.