F3 Naperville 5K Run & Walk
- Date
- September 27, 2026
- Distance
- F3 Naperville 5K Run & Walk · F3 Naperville 5K Kids Race (0.4 mile course for ages 9 and below)
From the Organizer
Welcome to the F3 Naperville Foundation 5K Race & Walk!
Join F3 Naperville on Sunday, September 27th, 2026, for our 8th annual 5K, once again being held on the beautiful trails of St. James Park in Warrenville, IL. This year, our premier fundraising event proudly supports third F initiatives. Run or walk with us on an official USA Track & Field course, knowing that 100% of the proceeds will benefit a non-for-profit charity to be announced later. Whether you're aiming for a personal record or enjoying a leisurely pace, all are welcome to participate in this great event!
Each registration is tax-deductible and if you're feeling generous, there is an opportunity for incremental donations. Additionally, there are sponsorships available for all levels!
The Course
We will once again be running on a beautiful USATF certified 5k course at the beautiful St. James Farm property in Warrenville, IL. The course itself is an undulating crushed limestone path that weaves through the prairie and woods with views of the horse barns towards the beginning and end of the looped course. For more information on the route, please see the link below. All registrations before August 22nd will be guaranteed to receive a limited edition F3 5K t-shirt! (Shirts are sized in Men, Women, and Kid sizes.)
To help make this event even MORE fun and family-friendly, there will be a Kona Ice truck on-site all morning for each child to receive a FREE crushed ice cup! Have your kids run or walk any of the events and then treat them to a special treat to celebrate their accomplishment!
Race Day Parking
Parking is FREE! Located outside the special use Entrance at St. James Farm In Warrenville, IL. Click Here for a map to the parking area. The special event parking is immediately adjacent to the start and finish line of the 5k which is preferable to the main entrance parking lot. Volunteers will be assisting with parking if you have any concerns.
T-shirt and Bib Pickup
You'll be able to pick up your shirts and bibs before the event or the morning of the race. To avoid lines on race day, we recommend picking up your shirt and bibs Saturday, Sept 20th. We will once again set up at the Naperville Running Store (South Location) from 10am-2pm that day.
Bring the whole family out as we will have specific races just for the kids on a smaller kids course. The KIDS RACE will be run AFTER the 5K event has completed. All kids 9 and under are encouraged to get out and run the custom 0.4 mile course.
Thank you for supporting the F3 Naperville & Little Friends! We can't wait for another tremendous event!
About F3 Naperville Foundation
The F3 Naperville Foundation (“F3NF”) is a registered 501(c)3 organization which supports and empowers local Naperville non-profit organizations and causes through funding and manpower to help them fulfill their own missions. Learn more at F3Naperville.com/Foundation
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
71°
Typical Low
49°
Chance of Rain
34%
Based on US Climate Normals data from West Chicago Dupage Ap, 6 mi from the venue.
Host City
About Warrenville, IL
Population
14,232
as of 2023
Elevation
706 ft
Nearest Airport
ORD
Chicago O'Hare International Airport · 18 mi
Time Zone
Central Time
From Endurance Grid
A small town race. Lodging near the start could be limited, so book early.
Race Location
Your Next Start Line
What Are You
Waiting For?
Every finish line starts with a single decision. Claim your spot at F3 Naperville 5K Run & Walk, put it on the calendar, and turn “someday” into a start date.
111
Days to train
- Race
- F3 Naperville 5K Run & Walk
- Date
- September 27, 2026
Coming Up
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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 the most accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
Frequently Asked Questions (FAQs)
- What is the F3 Naperville 5K Run & Walk?
- F3 Naperville 5K Run & Walk is a running race held in Warrenville, Illinois on September 27, 2026. It is one of the many endurance events listed on Endurance Grid, a multi-sport endurance event calendar covering running races, triathlons, HYROX, and more endurance sports across the United States. Find more running races near you or explore our sports guides to learn what race day actually feels like.
- When and where is the F3 Naperville 5K Run & Walk?
- Sunday, September 27, 2026 in Warrenville, Illinois at 2S541 Winfield Rd, Warrenville, IL. Check the event page for exact start times and wave schedules.
- How do I register for the F3 Naperville 5K Run & Walk?
- Registration is handled through the event's registration page. Confirm pricing and distances there, and sign up.
F3 Naperville 5K Run & Walk
Sep 27, 2026