18TH Annual
18th Annual F^3 Lake Half Marathon & 5k
18th Annual F^3 Lake Half Marathon & 5k is a running race on January 30, 2027 in Chicago, IL, with entry fees from $44 to $65.
- Date
- January 30, 2027 (191 days to go)
- Price
- $44–$65
- Sport
- Running
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
Events
Weather
Typical Conditions
It's too far out for a forecast, so here's what weather on this date is normally like in the area. A race day forecast will replace this as race week approaches.
Typical High
32°
Typical Low
20°
Based on US Climate Normals data from Chicago Northerly Is, 5 mi from the venue.
Host City
About Chicago, IL
Population
2,707,648
as of 2023
City Elevation
594 ft
Nearest Airport
MDW
Chicago Midway International Airport · 6 mi
Time Zone
Central Time
From Endurance Grid
A big city race. Expect multiple lodging options and plenty to do the day before.
Race Location
Your Next Start Line
What Are You
Waiting For?
Every finish line starts with a single decision. Claim your spot at 18th Annual F^3 Lake Half Marathon & 5k, put it on the calendar, and turn “someday” into a start date.
191
Days to train
- Race
- 18th Annual F^3 Lake Half Marathon & 5k
- Date
- January 30, 2027
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From Endurance Grid
About This Sport
Endurance Grid is here to help you understand the sport, decide if it’s the right fit, and learn how to prepare. For course distances, logistics, and race-day specifics, always defer to the race organizer’s event page.
With running, there's a distance for every fitness level, a community at every start line, and nothing beats the feeling of crossing a finish line you trained for.
Running is an endurance sport that rewards consistency, and showing up every week compounds in ways that will surprise you.
Running
From 5K to marathon, running races are an accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
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Plan your trip
Make it a Racecation
Coming from out of town? There's more to Chicago than race day. We'll help you line up nearby lodging, flights, a rental car, and things to do so you can make the most of your racecation.
Plan your trip to ChicagoFrequently Asked Questions (FAQs)
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18th Annual F^3 Lake Half Marathon & 5k
Jan 30, 2027