F^3 Events
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Chicago's Original Winter Half Marathon! F^3 is a grassroots organization started by a group of runners who like to run and have fun together.
02/26/2026
They finished the F^3 Chicago Half Marathon together, and now they’re starting their lives together.
ICYMI, we had an engagement at F^3 this year! A BIG congrats to Alexander Ge**er for popping the question and Caterina Mustacchi for saying ‘Yes!’ on the finish line.
Proof that some of the best PRs don’t happen on the course. 💍🏃♂️🏃♀️
Yes, they trained for 4 years to qualify for the Winter Olympics in Italy, but we ran our half marathon in 18° weather.
It’s basically the same, right?
Congrats to Team USA! You worked hard and earned every inch. Thank you for inspiring us!
01/31/2026
The weather came to play this year, and so did we. ❄️💪
Dress smart, stay safe and get ready for a classic winter race.
Remember to tag us in your race day pics and videos!
Freezing temps + strong runners = an unforgettable race day!
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