Marathons in Naperville, Illinois
2 upcoming races are listed in Naperville, including 1 marathon and 2 half marathons. The next is Endeavor Health Naperville Half Marathon, 10K & 5K on October 18, 2026.
October has the most races. Race pages link the official source where we have one. Confirm dates and prices with the organizer before you register.
2
Races listed
1
Marathons
October
Busiest month
21 May
Last updated
| Date | Race | Distances | From |
|---|---|---|---|
| 18 Oct 2026 18Oct 26 | Endeavor Health Naperville Half Marathon, 10K & 5K | 21.1K · 10K · 5K | $45–$100 |
| 1 Nov 2026 01Nov 26 | Naperville Marathon & Half Marathon | 42.2K · 21.1K | $75–$120 |
Around Naperville
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Common questions
When is the next race in Naperville?
Endeavor Health Naperville Half Marathon, 10K & 5K on October 18, 2026. The table above lists every upcoming race in date order.
Which months are busiest in Naperville?
October (1), November (1), counting every upcoming race listed in Naperville.
Which distances can I run in Naperville?
The listed races include 1 marathon, 2 half marathons, 1 10K and 1 5K. Many events offer more than one distance on the same day.
How do I confirm a race’s details?
Open the race page and check its provenance ledger, which shows where each fact came from. Then confirm the date, price and entry rules with the organizer before you register or book travel.
Spotted something wrong on this page?
Dates and prices move · tell us and we check the organizer’s source