A kooky Halloween event for all ages and abilities!
All-Out Kooky-Spooky
Sunday, November 2, 2025 9a
JeffCo NAAC, Golden, CO
Half Marathon
From the base of Table Mountain and Colorado's spectacular foothills, All-Out Multicourse presents our 14th annual Kooky-Spooky, benefiting the Colorado National Kidney Foundation office, from Jefferson County's NAAC Stadium… easily accessible from several nearby highways. Along with its Endless Series sidekick in March, Spring Fever, these 5K, 10K & Half Marathon courses will hug the shores of Arvada's Blunn Reservoir via the Ralston Creek Trail and will challenge the beginner and veteran athlete alike! Of course, we'll still be celebrating the Halloween spirit so re-use your Halloween costume (or take advantage of those post-Halloween sales) for our official costume contest. And especially revel in the extra hour of sleep you get as Nov. 2 is the end of daylight savings time!
Reasons Why You Should Join Us
- The only Halloween half marathon in the Denver area!
- Groups can run different distances from 5K to half marathon
- A wonderfully challenging course with terrific views of the Front Range that's accessible for all abilities
- Lots of on-course support for every distance, including dogs!
- Tons of free parking and convenient location
- Virtual option if the weather race day doesn't match your training goals
- Enjoy a loop course for the 10K, All-Out's only loop!
- A great costume contest with multiple categories
- Medals for all, including 5K, and free medal engraving to customize your keepsake!
- Full-color keepsake bibs, personalized if you register by two weeks before the event
Location
An official BOLDERBoulder qualifying event!
We are thrilled to announce that Kooky-Spooky has been designated as an official BOLDERBoulder Qualifier event! You can use your finishing time from any distance of this race to qualify for one of the 2026 BOLDERBoulder's qualified waves. For more details on the BB10K qualifying waves, please visit this link.
Partners
