Colorado · 50m · 1 Mile · 5K
Summer Sizzler- Denver
Summer Sizzler- Denver is a 50m, 1 Mile, 5K and 10K event held in Thornton, Colorado. Its next confirmed date is Saturday, August 7, 2027.
- Race day
- August 7, 2027
- Location
- Thornton, CO
Race details
- Date
- Saturday, August 7, 2027
- Location
- Thornton, Colorado
- Distances
- 50m, 1 Mile, 5K, 10K
- Registration
- runsignup.com
Registration, course & weather
- Registration status
- Open
- Start time
- 7:00 AM MDT
About the Summer Sizzler- Denver
Join us for the annual Summer Sizzler 5k/10k/15k! A fun summer event that is perfect for the whole family. The fun includes - Great Swag - designer shirt & custom medal Chip-timing with live results and awards Free photos Delicious Treats waiting at the finish line FREE Shaved Ice! Plenty of fun! Grab your friends and family, you are not going to want to miss this one! Can't make the race? No problem! We offer a virtual race option where you can run anywhere, at any time, and still earn the fun…
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Summer Sizzler- Denver: common questions
- When is the Summer Sizzler- Denver?
- The next confirmed date is Saturday, August 7, 2027.
- Where is the Summer Sizzler- Denver held?
- In Thornton, Colorado.
- What distances does the Summer Sizzler- Denver offer?
- 50m, 1 Mile, 5K and 10K.
- How do I register for the Summer Sizzler- Denver?
- Registration is handled by the organiser at runsignup.com. Entry fees, caps and deadlines are set there.
- Is registration open for the Summer Sizzler- Denver?
- Yes — registration is open. Listed fee for the longest distance, $17 (from runsignup.com, checked October 30, 2026).
- What time does the Summer Sizzler- Denver start?
- 7:00 AM MDT.
Plan this race in RaceRove
Save it to your plan, compare it with other races, check typical race-day weather and track your 50-state progress in the interactive app.