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 Little Friends and their crucial mission to provide resources for individuals and families affected by autism, intellectual, and developmental disabilities. Run or walk with us on an official USA Track & Field course, knowing that 100% of the proceeds will benefit Little Friends. 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!
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!
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.
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!
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
Sep 27, 2026
Distance — 5K
Type — Running
09:00
$45.00
Sep 27, 2026
Distance — 0.5 Miles
Type — Running
10:00
$20.00
These values represent the 3-year monthly averages for September in Warrenville.
Learn more about the host city, Warrenville.
Warrenville is a city in DuPage County, Illinois, United States. The population was 15,195 at the 2024 special census. Warrenville is a far west suburb of Chicago on the DuPage River. It is part of the Illinois Technology and Research Corridor, and is just north of I-88.
Read more launchRead what other athletes have to say about their experience at the F3 Naperville 5K Run & Walk for Little Friends.
Be the first to share your experience with the community!
Explore other exciting events happening in this same region.
location_on Carol Stream, Illinois, US
calendar_today Jul 18, 2026
Hand-picked events we think you’ll love.
Aug 09, 2026
The Rotary Club of Naperville-Sunrise will host the 29th Annual Rotary Ride on Sunday, August 9, 2026. This is a ride, …
Read more
Oct 24, 2026
Whether you’re a seasoned runner or just love to walk and take in the scenery, SKECHERS Wicked Wine Run is for you! Eac…
Read more
Sep 19, 2026
More than a race… It’s a celebration of you, your strength, and your sparkle! From coast to coast, tiara to tiara, the …
Read more
Jul 12, 2026
Biking with Beanzie (BWB) is a recreational ride presented by Kiwanis Club of Kishwaukee-DeKalb (IL) and sponsored by n…
Read more