Course
Run along the Big Dry Creek Trail in Westminster as it winds northeast, on concrete paving with a generous amount of soft surface alongside — especially on the 10K and half marathon routes, which makes it dog-friendly. Views of the Flatirons on the horizon. Half marathon, 10K and 5K are offered, each with a virtual option.
Key dates
- !RegistrationOpen now
- ★Race daySat 10 Jul 2027
About
Get ready for a fantastic mid-season challenge and a sun-soaked adventure at our 14th Annual Dog Days 5K, 10K, and half marathon, proudly benefiting Lifeline Puppy Rescue! Held in a central location convenient to both Denver and Boulder, our courses go along the scenic Big Dry Creek Trail as it winds northeast. You'll enjoy breathtaking views of the Flatirons on the horizon while you run.
Save All-Out Dog Days to your season and RunCalendar reminds you the morning entries open and before they close. Free on iPhone, no account needed.
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Silver Rush 50 Run
Leadville's high-altitude 50-miler through old mining country
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Grin & Bear It
Crested Butte's oldest trail race, to Green Lake
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High Lonesome 100
Crosses 12,000ft passes in the Collegiate Peaks
A confirmed date shows its day; a provisional one shows only its month, because we won't claim a day we don't have. This page is rebuilt every night from the RunCalendar catalogue.