18th Annual F^3 Lake Half Marathon & 5k

Get ready to brave the chill and join the exhilarating energy of Chicago's Original Winter Half Marathon & 5K! Experience the camaraderie and thrill of the 15th Annual F^3 Lake Half Marathon & 5K as thousands of runners conquer the winter elements along the scenic lakefront course, cheered on by our vibrant running community. Imagine starting the race in the cozy embrace of the United Club at Soldier Field, receiving an exclusive hoodie and medal to commemorate your journey, and then hitting the pavement with personalized pacing thanks to the pros from Fleet Feet & Chicago Endurance Sports.

With self-seeded waves to match your pace and indoor parking available, we've got you covered for a seamless race day. Whether you're gearing up for a spring marathon or just keeping up with your fitness resolutions, this sell-out event promises an unforgettable challenge with the chance at some serious prize money! Keep the date locked in – it's time to lace up and show winter who's boss!