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Dog-gone fun for humans and dogs!
All-Out Dog Days

Saturday, July 12, 2025 7:00a

Big Dry Creek Trail, Westminster, CO

Event Tiles

Half Marathon

$64.60 incl. $4.60 Fee 7:00AM MDT - 11:00AM MDT
246 spots left. Price increases after January 12, 2025 at 11:59pm MST

10K

$43.40 incl. $3.40 Fee 7:30AM MDT - 11:00AM MDT
246 spots left. Price increases after January 12, 2025 at 11:59pm MST

5K

$32.80 incl. $2.80 Fee 7:40AM MDT - 11:00AM MDT
439 spots left. Price increases after January 12, 2025 at 11:59pm MST
Run anywhere, anytime!

VIRTUAL Half Marathon

$43.40 incl. $3.40 Fee Get your alumni credit & the event SWAG
Run anywhere, anytime!

VIRTUAL 10K

$32.80 incl. $2.80 Fee Get your alumni credit & the event SWAG
Run anywhere, anytime!

VIRTUAL 5K

$27.50 incl. $2.50 Fee Get your alumni credit & the event SWAG
Register for all 3 and save!

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

 
 
 
 
 

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