As we mark the anniversary of the events at last year's Boston Marathon, it's even more important to cheer on friends, family members, and even strangers if you're attending the race on Monday. So get those markers and poster boards ready! Here are some ideas for inspirational, clever, and hilarious posters you can make for Monday's race (or any race!) — think of how psyched runners will be when they see this around mile 20.
Source: Instagram user vickie37