Discover fitness events & pop-ups happening all across St. Louis using this calendar!  This page will be updated regularly with new listings, so check back weekly or get on the email list for a weekly drop.  Hosting an upcoming event?  Add your listing here! 

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Events for December 21, 2025

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Ugly Sweater Run @ 4 Hands at The District

4 Hands at The District 17081 N Outer 40 Rd, Chesterfield

December is stacked, sparkly, and absolutely overflowing with community energy — and we cannot wait to run straight through it with you. ❄️💙 Here’s what the month looks like for the 3Run4 crew: 📅 SUNDAY, DECEMBER 7 — Group Run + Holiday Bazaar Shake out some miles, then sneak in a little post-run holiday shopping....

Free