2023 - Summer Sizzler- Denver
2023 distances
Running
1 Mile
5k Denver
10k Denver
15K Denver
Race-day weather
Conditions on July 16, 2023 — historical Open-Meteo data.
The sun rises at 5:44 AM and sets at 8:27 PM local time (MDT) in Thornton on July 16, 2023 — 14h 42m 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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2023 results — Summer Sizzler- Denver
193 finishers across 3 distances · leading places in the 5k Denver
| Place | Name | Time | Pace |
|---|---|---|---|
| 1 | Ethan Bartholomew | 20:03 | 6:28 /mi |
| 2 | Corwin Meichtry | 20:34 | 6:38 /mi |
| 3 | Ryan Swindle | 21:21 | 6:53 /mi |
| 4 | Dustin Case | 21:32 | 6:57 /mi |
| 5 | Jane Springston | 22:36 | 7:17 /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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