More than 22,000 runners will particpate in Monday's race, and all of them were required to pick up their bib numbers at the expo. The race brings an estimated 700,000 people to Greater Boston.
John Hancock Sports and Fitness Expo
More than 22,000 runners will particpate in Monday's race, and all of them were required to pick up their bib numbers at the expo. The race brings an estimated 700,000 people to Greater Boston.
(Boston.com Staff Photo / Gary Dzen)