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

Sat, Jan 30, 2027, 5:01 AM CST

Location: 1410 Special Olympics Drive, Chicago, IL 60614
Type: Run

Race feel

Embrace Chicago's winter running tradition with a community-focused half marathon or 5k along the lakefront, starting warm at Soldier Field.

Fun
Scenic
Competitive
Festive

Chicago's Original Winter Half Marathon and 5k invites thousands of runners to embrace the season. Gather in the warmth of Soldier Field's United Club before heading out to tackle the lakefront course, known for its 5km splits. This popular event, which has frequently sold out, is ideal for those training for a spring marathon or committed to winter fitness. Enjoy a community atmosphere, a commemorative hoodie, a medal, and free participant photos.

What to expect

From the organizer

The 18th Annual F^3 Lake Half Marathon & 5k is Chicago's Original Winter Half Marathon. Each year, thousands of runners flock to this community-built event, gathering in the warmth of Soldier Field's United Club before tackling wind & weather along a lakefront course that features splits every 5km. A must for anyone preparing for a spring marathon or just resolving to stay fit throughout the new year. F^3 sold out in 2016-2020 and 2023-present.

Every registrant will once again receive one of our great hoodies and a medal! We will return to the warm confines of Soldier Field's United Club! The UC opens at 8 a.m. Gear check is available. The half marathon starts at 10:01 a.m. and consists of self-seeded waves in quick succession. The 5k is scheduled for 10:29 a.m. Courses close at 1:30 p.m.

After the race, head to Weathermark Tavern for the afterparty! 1503 S. Michigan Ave . Free participant photos are always uploaded to flashframe.io