F3 Lake Half Marathon

The F^3 Lake Half Marathon & 5k is Chicago’s original winter half marathon, held annually at Soldier Field along the scenic lakefront. The event features a USATF-certified, mostly flat and fast course with mile markers and three aid stations offering water, energy drinks, gels, and restrooms. Runners start in self-seeded waves to reduce crowding, with pace groups ranging from 1:30 to 3:30 hours.

Participants enjoy the warmth of Soldier Field’s United Club before and after the race, with gear check and a post-race party at Weathermark Tavern. The race offers prize money, finisher hoodies, medals, and is a popular choice for winter training or spring marathon preparation. Visit the organization's website for the most recent information.