All-Out Dog Days
About this race
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.
Pick your distance
Running
Half Marathon
Half marathon athletes will join up with Big Dry Creek Trail and go along the gentle downhill course to the turnaround at mile 6.55, then return, enjoying views of the Front Range on this out-and-back course. There are 10 aid station stops for refueling along the route, along with 4 restroom stops.
10K
10K athletes will join up with Big Dry Creek Trail and go along the gentle downhill course to the turnaround at mile 3.1, then return, enjoying views of the Front Range on this out-and-back course. There are 4 aid station stops for refueling along the route, along with 2 restroom stops.
5K
5K athletes will join up with Big Dry Creek Trail and go along the gentle downhill course to the turnaround at mile 1.55, then return, enjoying views of the Front Range on this out-and-back course. There is 1 aid station/toilet stop near the turnaround.
VIRTUAL Half Marathon
Participate virtually! Get all of the SWAG, including a distance medal, shipped to you the week after the event, maintain eligibility for series finisher award and alumni brag tags, and get distance credit towards the Run Amok Championship!
VIRTUAL 10K
Participate virtually! Get all of the SWAG, including a distance medal, shipped to you the week after the event, maintain eligibility for series finisher award and alumni brag tags, and get distance credit towards the Run Amok Championship!
VIRTUAL 5K
Participate virtually! Get all of the SWAG, including a distance medal, shipped to you the week after the event, maintain eligibility for series finisher award and alumni brag tags, and get distance credit towards the Run Amok Championship!
Typical race-day weather
Based on 14 years of Open-Meteo archive data for this event's race dates in Westminster, plus the 3 days either side.
The sun rises at 5:40 AM and sets at 8:30 PM local time (MDT) in Westminster on July 10, 2027 — 14h 49m 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.
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Results — All-Out Dog Days
Other races near Westminster
Different organizers, within 40 miles, in the next three months
All-Out Fa La La
Westy Half & 5k
Excel Eagle Trot 5K/1K Family Fun Run
Candy Cane Course - Denver
🏃 Plan Your Next Race in Westminster
Find upcoming events by distance:
- Westminster 5K Races 12 races
- 10K Run Events in Westminster 8 races
- Westminster Half Marathons 6 races
- Westminster Running Calendar 2026 14 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, 14 Westminster events
Spotted something wrong? Tell us and we'll fix it.