Summer Sizzler- Denver 2026 — Thornton, CO

Date
August 8, 2026
Location
Thornton, CO
Venue
Carpenter Park/Thornton Recreation Center Park
Start Time
7:00 AM
Entry Fee
$17.00 – $48.00
Events
Kids Dash, 1 Mile, 5k, 10k, 15K, Volunteer and Run
Includes
T-Shirt
Register NowRegistration Open

The Summer Sizzler in Thornton costs between $17 and $48 to enter, with races starting at 7:00 a.m. The event takes place at Carpenter Park and Thornton Recreation Center Park in August and offers three distance options: a 1-mile run, a 6.2-mile race, and a 50-miler for ultramarathon competitors. If you can't travel to Colorado in person, a virtual participation option lets you complete your chosen distance elsewhere and submit your results. This setup works well for runners training through summer heat or those needing flexibility around their race schedule.

From the Race Organizer
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 swag! *Youth-based pricing for the 5k/10k, 12 & Under are only $17! 5k/10k/15K registration includes a custom bib, designer shirt, and a custom finisher medal! 1 Mile registration is untimed and includes a custom bib, designer shirt, and a custom finisher medal! The kid's dash is a fun, untimed dash for our kiddos ages 10 and under. Registration includes a mini bib, youth-sized shirt, and a specifically crafted medal for our kids' dash event! (If your child wants to run the kid's dash, and doesn't want the SWAG, they are welcome to run with us on race day for free!) *Register by midnight on Thursday, two Thursdays before race day, to guarantee your shirt! 🏁🏅Create a team, or join an existing team during registration. Once 4 people have registered on that team, all team members will be refunded $5, once ten people register another $5 will be refunded for a total of $10!

Hotels Near This Race

Find accommodation close to the start line in Thornton, CO. Sorted by distance from the race venue. Book early — race weekend hotels fill fast.

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Summer Sizzler- Denver 2026 — Thornton, CO

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Race Travel Insurance

Don't forget travel insurance for August 8.

You've trained for months and booked a trip to Thornton, CO. A pre-race injury, a delayed flight, or a family emergency can derail the whole thing. Travel insurance can help cover your race entry fee, hotel, and flights if you can't make it, and may cover medical costs if something goes wrong on the course. Plans typically only run 5-7% of your total trip cost — and running events are covered under standard plans with no additional coverage needed.

  • Trip cancellation up to 100% of prepaid costs
  • Running events covered under standard plans — no add-ons needed
  • Trip interruption up to 150% of non-refundable costs
  • Emergency medical up to $250,000
  • Cancel For Any Reason add-on available
  • 24/7 real-time support
Get a Quote — Faye Travel Insurance

Affiliate links — we may earn a commission at no cost to you. Coverage terms vary by state and plan. Review policy details before purchase.

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Frequently Asked Questions

When is Summer Sizzler- Denver 2026 — Thornton, CO?

Summer Sizzler- Denver 2026 — Thornton, CO takes place on August 8, 2026. The race is held in Thornton, Colorado.

Where is Summer Sizzler- Denver 2026 — Thornton, CO held?

Summer Sizzler- Denver 2026 — Thornton, CO is held at Carpenter Park/Thornton Recreation Center Park in Thornton, Colorado.

Where can I find hotels near Summer Sizzler- Denver 2026 — Thornton, CO?

RaceHotelFinder shows hotels sorted by distance from the race venue in Thornton. Use the map or list view on this page to compare options and book race weekend accommodation.