Illinois · Half Marathon · 10K · 5K
Naperville Half Marathon
Naperville Half Marathon is a half marathon, 10K and 5K event held in Naperville, Illinois. It was last held on October 18, 2026 and is usually run in October; the next date hasn't been announced yet. About 6,000 runners take part across all distances.
- Usually held
- October
- Location
- Naperville, IL
- Field size
- ~6,000 runners
Race details
- Last held
- October 18, 2026
- Usually held in
- October
- Location
- Naperville, Illinois
- Distances
- Half Marathon, 10K, 5K
- Field size
- About 6,000 runners
- Course
- Rolling hills
- Registration
- runnaperville.com
- Official website
- runnaperville.com
Registration, course & weather
- Registration status
- Registration status as last checked October 7, 2026: open
- Start time
- 7:00 AM CDT
- Course profile
- Loop course; Road surface
- Typical race-day weather
- about 50°F at the start, 90% humidity, 19 mph wind (based on the 2025 race day, measured near the city center rather than the exact start line; Open-Meteo, checked October 2, 2026)
About the Naperville Half Marathon
A high-energy fall half marathon (plus 10K and 5K) winding through Naperville's lively downtown and historic neighborhoods, drawing roughly 6,000 runners. It is one of the suburbs' premier road races.
Rankings and notes
- Rankings and awards
- USATF-certified; consistently ranked among Illinois' best-reviewed half marathons; Boston-qualifier course
- Notes
- Popular suburban half marathon
More half marathons in Illinois
Coming up next, by confirmed date.
-
Springfield Marathon & Harvest Wind Half Marathon & 10KNew Berlin, ILMarathonHalf Marathon10K ~1,403 runners
More races in Naperville
-
Naperville Noon Lions Turkey Trot 5KNaperville, IL5K - Ages 10-145K - Ages 15 and up5K - Ages 9 and under ~8,000 runners
More upcoming races in Illinois
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Guides from the RaceRove blog
- 8 min read How to Choose the Best Half Marathon for a PR, Racecation or 50-State Challenge The best half marathon depends on what you want from it. How to choose a course for a personal record, a race worth travelling for, or an efficient stop on a 50-state challenge.
- 7 min read How to Find a 5K, 10K, Half Marathon or Marathon Near You A practical way to find running races near you: pick a distance, decide how far you'll travel, read the listing properly and confirm the details before you register.
- 9 min read How to Run a Race in All 50 States How to plan a 50-state running challenge: set your own rules, group states into trips, build a calendar around the seasons, budget for it and keep track of every finish.
- Blog All guides Planning advice for finding, choosing and travelling to races.
Naperville Half Marathon: common questions
- When is the Naperville Half Marathon?
- The next date hasn't been announced in the listing yet. The race is usually held in October. Check the organiser's website for the official date.
- Where is the Naperville Half Marathon held?
- In Naperville, Illinois.
- What distances does the Naperville Half Marathon offer?
- Half Marathon, 10K and 5K.
- How many people run the Naperville Half Marathon?
- About 6,000 runners across all of its distances. That figure is an estimate of the field size, not an entry cap.
- How do I register for the Naperville Half Marathon?
- Registration is handled by the organiser at runnaperville.com. Entry fees, caps and deadlines are set there.
- Is registration open for the Naperville Half Marathon?
- Registration status as last checked October 7, 2026: open.
- What time does the Naperville Half Marathon start?
- 7:00 AM CDT.
- What is the course like at the Naperville Half Marathon?
- Loop course; Road surface.
- What is race-day weather usually like at the Naperville Half Marathon?
- about 50°F at the start, 90% humidity, 19 mph wind (based on the 2025 race day, measured near the city center rather than the exact start line; Open-Meteo, checked October 2, 2026).
Plan this race in RaceRove
Save it to your plan, compare it with other races, check typical race-day weather and track your 50-state progress in the interactive app.