This weekend, 50,000 runners will take part in one of the most iconic races in the world — the 2025 TCS New York City Marathon. If you’re lucky enough to have a bib, there are already a few things to remember: charge your Garmin and headphones, remember the clocks change at midnight, and follow the rules.

Some are obvious, some aren’t, and some are plain hilarious, but here are 15 things runners are not allowed to do at the New York City Marathon.

Inspired by this weekend? Check out the best running shoes on the market here, tried and tested by the Tom’s Guide fitness team.

15 things runners are not allowed to do at the TCS New York City Marathon

1. Swap their race number

Let's start with a pretty obvious one — runners are not allowed to transfer their bib to another person, or sell i

See Full Page