Cupid's Undie Run - Saint Louis

Get ready to strip down for a cause at Cupid's Undie Run - Saint Louis, a thrilling and unique event hitting the streets of St. Louis, MO, on February 7, 2026. This isn't just a 1-mile dash; it's the nation's largest pantless party with a serious mission: to raise funds and awareness for Neurofibromatosis (NF) research through the Children's Tumor Foundation. Starting and finishing at Ballpark Village, 601 Clark Ave, the day kicks off with a lively pre-party, transitions into the memorable mile(ish) run through downtown St. Louis, and culminates in an epic dance party.

The atmosphere at Cupid's Undie Run is electric, a vibrant blend of courage and camaraderie where participants embrace the chilly February air in their most creative underwear and costumes. The course itself is an easy, out-and-back route, designed for fun rather than speed, welcoming "every BODY" to join the celebration of philanthropy. Typical race day conditions in early February see highs around 42F and lows around 24F, with a minimal 8% chance of precipitation, making the festive energy of the crowd and the post-run party all the more inviting.

More than just a run, this event transforms into an unforgettable experience, fostering community spirit while making a significant impact. The St. Louis event has a proud history of raising substantial funds, contributing to the millions collected nationally since Cupid's Undie Run began in 2010. Join thousands of other undie runners for a day of laughter, dancing, and a powerful statement in support of finding a cure for NF.