Cupid's Undie Run - Denver

Get ready to strip down for a cause at Cupid's Undie Run - Denver, hitting the streets of Denver, CO, on February 28, 2026. This unique "mile-ish" run invites participants to brave the winter chill in their skivvies or fun costumes, all to raise vital funds and awareness for neurofibromatosis (NF) research. Far from a typical race, Cupid's Undie Run is renowned as "the largest pantless party and mile(ish) run in the nation," offering a playful spirit with a serious mission to support the Children's Tumor Foundation.

The event kicks off with a vibrant pre-party at Stoney's Bar and Grill (1111 Lincoln Street), setting an electric atmosphere filled with music and dancing before the brief downtown dash. Runners will traverse a course that has historically wound around iconic landmarks like the Denver Art Museum and Civic Center Park, offering an urban scenic backdrop for this unforgettable experience. While aid stations are not the focus of this short fun run, the energy of the crowd and the cause itself provide ample motivation. Typical race day conditions in late February often see highs around 49F and lows around 21F, with a minimal 2% chance of precipitation, though past events have sometimes been met with near-freezing temperatures, adding to the camaraderie and "chilly cheeks" factor.

Since its inception in 2010, Cupid's Undie Run has grown into a national movement, raising millions for NF research, a genetic disorder causing tumors to grow on nerves throughout the body. Participants consistently praise the event for its blend of fun, community spirit, and purposeful philanthropy, making it less about speed and more about making a tangible difference. It's an opportunity to join thousands nationwide in a bold statement, proving that nothing will stop the pursuit of a cure.