2027 Cupid's Undie Run | San Francisco

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This February, be a part of something great. There are few things in this world that feel better than getting half-naked for charity. Cupid's Undie Run lets you live that dream in the winter, in San Francisco.

The run itself happens around Valentine's weekend each year and is a “brief” fun run that takes place in the middle of a BIG party. That’s right: party, run (a mile-ish, at your own pace), party – all to find a cure for neurofibromatosis (NF), a genetic disorder that causes tumors to grow on nerves throughout the body and affects 1 in every 3,000 births.

Be a part of something great. Last year, Cupid’s raised over $3.5 million to #EndNF, and they’re relying on YOU to join and make this year’s fundraising the biggest and best yet. Start a team, join a team, or just run solo and make some new friends!

Run Pick of the Month - Napa to Sonoma Wine Country Half Marathon & Rosé 5K

Your ultimate Wine Country runcation awaits in July 2026!

Use code N2SRG26 to get $10 off on your entry!

Trade the concrete jungle for rolling vineyards and uncork a new running personal best at the Napa to Sonoma Half Marathon & Rosé 5K. This is more than a race, it's your perfect run-cation escape.

Choose your vintage: Take on the picturesque Rosé 5K around historic Sonoma Plaza, or conquer the world-class Half Marathon that winds point-to-point from Napa, past 30+ iconic wineries and beautiful ranches.

Experience an unforgettable, wine-centric finish in Sonoma Plaza, complete with a celebratory post-race festival featuring tastings from local wineries!.

Sign up now and experience the run-cation that runners repeatedly cite as a favorite!

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