2025 - Summer Sizzler- Denver
2025 distances
Running
1 Mile
1 Mile registration is untimed and includes a designer shirt and a an awesome finisher medal!
5k DEN
10k DEN
15K DEN
Race-day weather
Conditions on August 16, 2025 — historical Open-Meteo data.
The sun rises at 6:13 AM and sets at 7:54 PM local time (MDT) in Thornton on August 16, 2025 — 13h 41m 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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2025 results — Summer Sizzler- Denver
264 finishers across 3 distances · leading places in the 5k DEN
| Place | Name | Time | Pace |
|---|---|---|---|
| 1 | Xavier Sanchez | 17:35 | 5:40 /mi |
| 2 | Logan Clark | 19:52 | 6:24 /mi |
| 3 | Diego Garcia | 20:20 | 6:33 /mi |
| 4 | Bruce Schroer | 20:57 | 6:45 /mi |
| 5 | Christopher Viurquez -Vera | 22:15 | 7:11 /mi |
Every finisher is on the results page, filterable by distance, gender and age group.
Other races near Thornton
Different organizers, within 40 miles, in the next three months
I Ain't Scared (of 5k)
4A Region 3 XC State Qualifier
WinterFest 5k & Fun Run
Candy Cane Course - Denver
🏃 Plan Your Next Race in Thornton
Find upcoming events by distance:
- Thornton 5K Races 7 races
- Thornton Running Calendar 2026 13 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, 13 Thornton events
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