All-Out Kooky-Spooky

Trail

Arvada, Colorado, United States

Nov, 2026 (TBD)

5k, 10k, Half-marathon

Race Information

From the base of Table Mountain and Colorado's spectacular foothills, All-Out Multicourse presents Kooky-Spooky 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!

Destination Run Pick of the Month - Ogden Marathon

Experience the Ogden Marathon, recognized by Runner’s World and Shape.com as one of the most beautiful on Earth—and one of the top for first-time marathon runners, taking place on May 16, 2026.

Use code RUNGUIDES to SAVE $10 on the half or full marathon!

Celebrating 25 years of unforgettable miles, this world-class race offers a breathtaking journey through the stunning Ogden Canyon on a gentle downhill course that's not only incredibly scenic—but also a fast Boston Qualifier. With multiple race distances, unmatched community support, and a thrilling finish on Historic 25th Street, it’s the perfect adventure for runners of every level.

Stick around post-race for the Finish Line Festival, which features live music, food trucks, vendors, character appearances, kids’ activities, and nonstop family fun!

Be part of a milestone year, with extra surprises, swag, and race-day energy to celebrate 25 years strong. Click the button below to get all the details.

Get Event Info

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Race Facts

Race Size: 500 - 1,000

Elevation: Some Hills

Course Type: Trail

Boston Qualifier: No

Kids Run: No

Where to Stay

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