Naperville Half Marathon
Naperville Half Marathon offers a fast, spectator-lined course through historic neighborhoods.
Race Date
Oct 18, 2026
Location
Naperville, IL
Quick facts
- Date
- Sunday, October 18, 2026
- Location
- Naperville, Illinois
- Distance
- Half marathon (13.1 mi) + 10K, 5K run
- Course
- Loop Course
- Terrain
- Road
- USATF certified
- Yes
- Finishers on record
- 22,788
Highlights
Good For
Atmosphere
Course
The Experience
The Naperville Half Marathon, 10K, and 5K transform the charming streets of Naperville, Illinois, into a vibrant racecourse each October. Runners can expect a fast, flat route that winds through the city's lively downtown, past historic landmarks, and through picturesque neighborhoods. This USATF-certified course is known for its minimal elevation change, making it a prime candidate for personal bests.
With an average of over 1,000 finishers in recent years, and runners traveling from approximately 19 states, the event has cultivated a loyal following, with about 35% of participants returning annually. The course is lined with enthusiastic spectators, contributing to a high-energy atmosphere on a cool autumn morning. The event, now in its 12th year, offers a well-organized race experience with the added bonus of other distances for friends and family.
Finishers can celebrate their accomplishment in a town known for its community spirit, capping off a rewarding day of running amidst the beauty of Naperville's fall scenery.
Race-provided description
The Naperville Half Marathon, 10K & 5K are spectator-filled, high-energy races on a cool October morning, featuring Naperville’s lively downtown, historic sights and beautiful neighborhoods.
Course Info
USATF CertifiedCourse Type
Loop Course
Terrain
road
Scenery
Urban, Small Town
Surface
Paved
Difficulty
Ultra-Flat
Net Drop/km
0 m (Flat)
Separation
0.0%
Also Offers
USATF Certified Course
IL23003WR · Naperville Women's HM
Relatively flat with minimal net elevation change. Loop course — start and finish are close together.
Quality Score
Runner Favorite8912 years running
~1,271 finishers a year
shrinking
35% returning runners
USATF certified · 2 timing sources
runners from 19 states
winner 1:12:06
typical high 61°F
Race Day Weather
5-year historical avgStart (Low)
44°
Afternoon (High)
61°
Pleasant conditions — light layers at start, comfortable by finish
0.1"
Precipitation
13 mph
Wind
66%
Humidity
Historical Finish Times
How 22,788 finishers actually crossed the line across 12 years.
Most recent
2025
Total finishers
22,788
Median time
2:06:23
Latest turnout
1,089
States
42
Turnout by year
2017–2025
Hover the histogram to inspect specific finish times.
Frequently asked
When is the Naperville Half Marathon?
The Naperville Half Marathon is held on Sunday, October 18, 2026.
Where does the Naperville Half Marathon take place?
It takes place in Naperville, Illinois.
What distances does the Naperville Half Marathon offer?
The half marathon (13.1 miles), plus 10K, 5K run.
Is the Naperville Half Marathon course flat and good for a PR?
The Naperville Half Marathon is a ultra-flat, loop course course. The course is USATF-certified, so finish times can be used for qualifying.
How many people run the Naperville Half Marathon?
HalfRuns has finish records for 22,788 runners who have completed the Naperville Half Marathon.
HalfRuns editorial — independent, no paid placement.
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