Saturday, January 31st, 2026
1410 Special Olympics Drive, Chicago IL
Half · 5K
About this race
🏃♂️ Event Overview
The 17th 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.
🎽 Registration Details
- Swag: Every registrant will once again receive one of our great hoodies and a medal!
- Warmth: We will return to the warm confines of Soldier Field's United Club!
- Gear Check: Available for all participants.
- Start Times: Half marathon starts at 10 a.m. and the 5k is scheduled for 10:30 a.m.
🕒 Course Information
The half marathon consists of self-seeded waves in quick succession. Courses close at 1:30 p.m.
🎉 Afterparty Details
After the race, head to Weathermark Tavern for the afterparty! 1503 S. Michigan Ave. Free participant photos are always uploaded to flashframe.io.
📍 Event Location
1410 Special Olympics Drive, Chicago, IL
🔗 Race URL
For more details, visit the official race page.
Course map
Train with a club
Run clubs near Chicago to train with before race day.
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