RunRace USA › Illinois › Chicago › 18th Annual F^3 Lake Half Marathon & 5k
18th Annual F^3 Lake Half Marathon & 5k
Saturday, January 30, 2027 · Chicago, IL
The race in 60 seconds
It is one of 22 races on the Illinois calendar that January.
What race day usually feels like
Based on the last three years, race week in January typically sees lows near 23°F and highs around 37°F: cold start, dress in layers you can shed. Weather normals computed from Chicago-area conditions for race week, not the nearest big city.
Pacing the Half Marathon
Overall average pace for the Half Marathon, aid and rest stops included. Find your band before the start and let the first miles feel too easy.
| Finish time | Average pace | Feels like |
|---|---|---|
| 1:32 | 7:00 /mi | Front of the field |
| 2:04 | 9:30 /mi | Strong, steady effort |
| 2:37 | 12:00 /mi | Comfortable and conversational |
| 3:16 | 15:00 /mi | Every finish counts |
Common questions
When is 18th Annual F^3 Lake Half Marathon & 5k?
18th Annual F^3 Lake Half Marathon & 5k is scheduled for Saturday, January 30, 2027.
Where is 18th Annual F^3 Lake Half Marathon & 5k held?
18th Annual F^3 Lake Half Marathon & 5k is held in Chicago, Illinois. It is about 36 miles from Aurora.
What distances does 18th Annual F^3 Lake Half Marathon & 5k offer?
The listed distances are Half Marathon, 5K.
How much does 18th Annual F^3 Lake Half Marathon & 5k cost?
Listed event options start from $38. This minimum may be for a kids or shorter event. Check the official race page for your distance's current price and any additional fees.
How do I register for 18th Annual F^3 Lake Half Marathon & 5k?
Registration is handled on the official race page, linked at the top of this listing. Entry can close early if the race sells out.
More races nearby
Within about 60 miles, ordered by approximate straight-line distance between listed locations.
- Dec 31, 2026New Year's Eve 5KChicago, IL · 5K
- Dec 12, 20262026 Jingle Bell Run - Chicago, ILChicago, IL · 5K, 1 Mile
- Nov 22, 2026Run for a Sole 5KChicago, IL · 5K
- Oct 24, 2027Haunted Halloween Half Marathon & 5kmChicago, IL · Half Marathon, 5K
See every race on the Illinois calendar, all Chicago races, Illinois Half Marathons, Illinois 5Ks, or use the Race Finder for maps and filters.
Register for 18th Annual F^3 Lake Half Marathon & 5k →on RunSignUp · listed event options from $38
Listing data refreshed nightly from the registration platform. Photos via Wikimedia Commons (CC BY 2.0, CC BY-SA 2.0). Last template review July 2026. Spot an error? Tell us and we'll fix it fast.