All-Out Kooky-Spooky

Arvada, Colorado, United States

Nov 1, 2026 - Sunday

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!

Related Events

All-Out Fallfest

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Size: 100 - 500 participants

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Half-marathon

All-Out Kooky-Spooky

Date: Nov 1, 2026 - Sunday

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Date: Dec 5, 2026 - Saturday

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All-Out Polar Prowl

Date: Jan 9, 2027 - Saturday

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All-Out Mardi Crawl

Date: Feb 6, 2027 - Saturday

Size: 100 - 500 participants

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Half-marathon

All-Out Spring Fever

Date: Mar, 2027 (TBD)

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Half-marathon

All-Out Summer Breeze

Date: Jun, 2027 (TBD)

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Half-marathon

All-Out Beat the Heat

Date: Jul, 2027 (TBD)

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Half-marathon

All-Out Dog Days

Date: Jul, 2027 (TBD)

Size: 100 - 500 participants

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Half-marathon

All-Out Runapalooza

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👍 Run Pick of the Month: SKECHERS Hot Chocolate Run Denver

📍Denver - Sunday October 4, 2026

💸 Get a free tumbler. Use Code RGDENCC

😄 Why We Like This Run
✅ Exclusive SKECHERS Hot Chocolate Run Fleece
✅ Chocolate Fondue Finisher’s Mug
✅ Free Race Photos

Get ready to indulge your cravings and crush your goals at the SKECHERS Hot Chocolate Run in Denver! Whether you’re tackling the 5K, 10K, or the signature 15K, every mile is fueled by fun and every finish line is paved with chocolate.

Bring your friends, bring your family, and get ready to earn that cocoa - because there’s truly no finish line sweeter than this one. Sign up now and prepare to indulge!

Register Now

Recruiting Women Cyclists and Runners! 🏃🏼‍♀️🚴🏽‍♀️

UCCS researchers recruiting women runners and cyclists for a study evaluating how fasted exercise influences menstrual cycle health.

What You Get:
💵 Up to $225 in compensation
📊 Free Fitness Testing: VO2 Max, DEXA Body Composition & Bone Density Scan
🍏 Consultation with a Registered Sports Dietitian

What Is Required:

Monitor your urine hormones, diet, and physical activity for 3 months at-home.
Complete an initial lab visit + 3 x 90 min exercise sessions in-person.

Check Study Eligibility

Who Qualifies? Females age 18–40 who run or cycle 3+ times a week and have regular cycles.

Join Study Here

🏃 Looking For More Runs Near Denver?

Find another distance:

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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