All-Out Dog Days
Sat, Jul 11, 2026, 3:00 AM MDT
- Type
- Run
Sign up and verify details on the organizer's official page.
Race feel
A scenic, dog-friendly run with a costume contest, supporting Do Over Dogs. Perfect for a summer challenge with your pup.
- Fun
- Scenic
- Quirky
- Festive
- For a Cause
Fun
Scenic
Quirky
Festive
For a CauseEmbrace a sun-soaked mid-season challenge at the 13th Annual All-Out Dog Days in Westminster, CO. This event offers 5K, 10K, and half marathon distances along the scenic Big Dry Creek Trail, providing breathtaking views of the Flatirons. Runners and their canine companions can enjoy a generous amount of soft surface on the longer routes. Celebrate your furry friends with a special dog division for the fastest pups and a delightful dog-themed costume contest. Participation also supports Do Over Dogs, adding a meaningful purpose to your run.
From the organizer
Get ready for a sun-soaked adventure and a fantastic mid-season challenge with our 13th Annual Dog Days 5K, 10K & Half Marathon, benefiting Do Over Dogs! Held in a central location between Denver and Boulder, our courses wind northeast along the scenic Big Dry Creek Trail. As you run, you’ll enjoy breathtaking views of the Flatirons on the horizon. Our trail is perfect for dogs, featuring a generous amount of soft surface along the 10K and half marathon routes. Plus, we have a special dog division to award the fastest pups at each distance and a dog-themed costume contest for extra fun! And continue the challenge by participating in the endless series counterpart, Fa La La, in December.
