Fiesta de Mayo 5k - Battling Cancer Together

Celebrate the Season at the 4th Annual Fiesta de Mayo 5K!
Run for a Cure. Stay for the Fiesta.

Join Battling Together for our 4th Annual Fiesta de Mayo 5K walk/run as we return to beautiful Webster Groves to raise vital funds in the fight against blood cancers. All proceeds benefit Blood Cancer United, in their mission to find a cure for Leukemia, Lymphoma, and all forms of blood cancer. We appreciate you helping us raise vital funds for this important cause.

The Experience Enjoy a scenic, professionally timed course that winds through the stately streets of Webster Groves, followed by the ultimate post-race celebration. Whether you’re cooling down with a refreshing Kona Ice snow cone or celebrating your finish with a signature margarita, we have the perfect reward waiting for you at the finish line!

To our returning runners—thank you for your continued support. To those joining us for the first time—we can’t wait to show you what makes Fiesta de Mayo such a special event.

Get ready for an epic morning! Your registration includes:

• Custom Fiesta de Mayo Tee – A unique, high-quality design perfect for race day and beyond.
• Youth Finisher Medals – Commemorative medals to celebrate the hard work of our runners aged 16 and under.
• Professional Chip Timing – Accurate, real-time results provided by the experts at Big River Race Management.
• Signature Margarita – A refreshing post-race celebration to honor your finish and toast to a world without cancer (ages 21+).
• Kona Ice Snow Cones – The Kona truck will be on-site providing refreshing treats for everyone to enjoy!

🏁 Don’t miss out! Register by April 12 to guarantee your official Fiesta de Mayo race shirt.

*** Blood Cancer United is formerly known as the Leukemia & Lymphoma Society.

Join fellow runners on May 3, 2026 for the Fiesta de Mayo 5k - Battling Cancer Together. It's a fantastic 5K featuring a flat and fast course in Saint Louis.