18th Annual F^3 Lake Half Marathon & 5k
Saturday, January 30, 2027
Chicago, Illinois
The Experience
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
Race Details
Race Day
Saturday, January 30, 2027 · 1/30/2027 10:01
Start Location
1410 Special Olympics Drive, Chicago, IL 60614
Course
Loop
Also Offers
Giveaway
Where will you pick up your packet?
Registration
Register online — $57
Race Website
Official race information
Past Results
View previous race results
Historical Weather
☀
Avg High
34°F
☽
Avg Low
20°F
☂
Precip
0.13 in
🍃
Wind
16 mph
More races in Illinois
The Experience
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
Race Details
Race Day
Saturday, January 30, 2027 · 1/30/2027 10:01
Start Location
1410 Special Olympics Drive, Chicago, IL 60614
Course
Loop
Also Offers
Giveaway
Where will you pick up your packet?
Registration
Register online — $57
Race Website
Official race information
Past Results
View previous race results