Not So Flatt Breast Cancer Awareness Run/Walk – 5K & 10K in Denver, CO
About this race
Join us in honoring survivors and supporting the fight against breast cancer.
The 5th Annual Not So Flatt Breast Cancer Awareness Run/Walk on October 4, 2025, will be in Westminster, CO. Participate in our 5K or 10K event supporting breast cancer research.
Honor, remember, and support the fight against breast cancer at our annual breast cancer awareness run. In 2021, my father lost his battle with breast cancer, and we started this event to bring the community together, celebrate survivors, and support those still fighting. His last name was Flatt—but his fight wasn’t flat, and neither is the strength of our community.
Event Highlights:
Race Options: 5K walk/run and 10K run—perfect for all ages and fitness levels.
T-Shirts & Medals: All participants receive a race T-shirt; top finishers earn medals.
Special Registration Offers:
5K: $30 until September 12th, then $35. Donate $35 while registering and get $30 off!
10K: $40 until September 12th, then $45. Donate $45 while registering and get $40 off!
Race Day Goodies: Bib pickup includes your race day schedule, shirt, and surprise goodies. Sign up after September 15th and your shirt size may not be guaranteed.
Virtual Run: If you’re unable to attend in person, you can register for our virtual run! The signup cost goes straight to donations for Breast Cancer Research. Submit your photo, and we’ll feature it on our website and social media to celebrate your participation.
Why Participate:
Support groundbreaking breast cancer research through the Breast Cancer Research Foundation.
Join a compassionate and inspiring community affected by breast cancer.
Honor loved ones and survivors while enjoying a fun, family-friendly event.
Don’t miss out on this meaningful 5K race for charity and 10K run for a cause! Register today, share with friends, and help us make a difference. For questions or suggestions, fill out our contact form. Race day schedules will be emailed the week before the event.
Pick your distance
Running
Not So Flatt Breast Cancer Awareness 5K October 2nd, 2027
Breast Cancer Awareness Race
Not So Flatt Breast Cancer Awareness 5k Virtual Run October 2nd, 2027
Not So Flatt Breast Cancer Awareness 10K October 2nd, 2027
Breast Cancer Awareness Race
Not So Flatt Breast Cancer Awareness 10k Virtual Run October 2nd, 2027
Typical race-day weather
Based on 12 years of Open-Meteo archive data for this event's race dates in Westminster, plus the 3 days either side.
The sun rises at 6:57 AM and sets at 6:41 PM local time (MDT) in Westminster on October 2, 2027 — 11h 44m of daylight.
Course
No course map published yet.
The organizer hasn't released a route for this event, and we don't publish guesses. If you're the organizer, send us a GPX file and we'll draw the profile.
Reviews
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Results — Not So Flatt Breast Cancer Awareness Run/Walk – 5K & 10K in Denver, CO
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🏃 Plan Your Next Race in Westminster
Find upcoming events by distance:
- Westminster 5K Races 13 races
- 10K Run Events in Westminster 9 races
- Westminster Half Marathons 6 races
- Westminster Running Calendar 2026 15 races
Where this page comes from. Race details were last updated on . We re-check listings regularly and again in the week before race day.
- Entries, prices, waves and inclusions — the event's official registration page
- Temperature and humidity — Copernicus ERA5 reanalysis via Open-Meteo (CC BY 4.0)
- Elevation and terrain relief — Copernicus DEM GLO-90, ESA (CC BY 4.0)
- Comparisons and counts — Race Discovery calendar, 15 Westminster events
Spotted something wrong? Tell us and we'll fix it.