A few days ago you received an email with your bib number and your starting box, but if you don't have it and you don't see it in 'spam', you can look for your bib number before going to pick it up at the Race Fair. If you don't find it, don't worry, at the Race Fair (at the 'Solutions' booth), they will help you.
Remember that you can also authorize someone to pick up your bib for you. Here, you have the information about location, schedules, authorizations and parking.