The Go! St. Louis Marathon Weekend includes a Health and Fitness Expo, a 5K Run/walk, children's fun runs, and a "mature mile" on Saturday and then the half-marathon, marathon, and marathon relay on Sunday. There are over 23,000 participants. Expo: I received my bib number by email a few days before the Expo along with a "virtual goody bag" which essentially was just a website listing the sponsors. The Expo itself was on Friday evening and Saturday during the day. We went on Friday about an . . .