Hi and welcome to The Iris Fund's New York City Marathon page! The Iris Fund is a nonprofit working to improve pregnancy outcomes and prevent loss by supporting innovative research, advocacy, and community connection. We partner with leading scientists and medical institutions to better understand how pregnancy works, advance maternal health, and support families affected by loss. Every mile you run helps fuel this work — driving research forward, supporting families, and creating healthier futures for parents and babies. 💜

2026 TCS New York City Marathon