Upcoming 5K Races Near Castle Rock, CO

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The Bullfrog Splashdown

Littleton, CO

Sunday, June 14th, 2026

10K

1 Mile

View details for race The Bullfrog Splashdown

Treat Trot Colorado Springs

Colorado Springs, CO

Sunday, June 14th, 2026

10K

15K

View details for race Treat Trot Colorado Springs

2026 Doggie Dash

Colorado Springs, CO

Saturday, June 20th, 2026

View details for race 2026 Doggie Dash

Muddy Dash | Denver 2026

Dacono, CO

Saturday, June 20th, 2026

View details for race Muddy Dash | Denver 2026

Fatherhood 5k Family Run/Walk

Colorado Springs, CO

Saturday, June 20th, 2026

View details for race Fatherhood 5k Family Run/Walk

Unicorn 5k (North)

Thornton, CO

Saturday, June 20th, 2026

View details for race Unicorn 5k (North)

Parker Parks and Recreation Dash Across the Dam...

Parker, CO

Saturday, June 20th, 2026

View details for race Parker Parks and Recreation Dash Across the Dam Father’s Day 5K

2026 CANCELED-14th Annual Buffs4Life Kyle MacIn...

Boulder, CO

Sunday, June 21st, 2026

View details for race 2026 CANCELED-14th Annual Buffs4Life Kyle MacIntosh Memorial 5K Run/Walk

Sunset Trail Running Festival

Boulder, CO

Sunday, June 21st, 2026

12K

Trail

View details for race Sunset Trail Running Festival

Juneteenth Fun Run 5K

Denver, CO

Sunday, June 21st, 2026

View details for race Juneteenth Fun Run 5K

Father's Day Classic 10k, 5k, & 1 Mile

Arvada, CO

Sunday, June 21st, 2026

10K

1 Mile

View details for race Father's Day Classic 10k, 5k, & 1 Mile

VIRTUAL 14th Annual Buffs4Life Kyle MacIntosh M...

Boulder, CO

Sunday, June 21st, 2026

View details for race VIRTUAL 14th Annual Buffs4Life Kyle MacIntosh Memorial 5K Run/Walk

The Red Schoolhouse Run

Louisville, CO

Tuesday, June 23rd, 2026

View details for race The Red Schoolhouse Run

The Four Legged 5k

Bailey, CO

Friday, June 26th, 2026

View details for race The Four Legged 5k

Denver Pride 5K

Denver, CO

Saturday, June 27th, 2026

View details for race Denver Pride 5K

Fitness Expo On Tap at the Colorado Tap House

Arvada, CO

Saturday, June 27th, 2026

1 Mile

View details for race Fitness Expo On Tap at the Colorado Tap House

Before The Fourth 5k

Littleton, CO

Saturday, June 27th, 2026

View details for race Before The Fourth 5k

6th Annual July 4th ROCK-IT RUN

Castle Rock, CO

Saturday, July 4th, 2026

Half

View details for race 6th Annual July 4th ROCK-IT RUN

Let Freedom Run 5k/10k - Louisville

Louisville, CO

Saturday, July 4th, 2026

10K

View details for race Let Freedom Run 5k/10k - Louisville

HRCA Independence Day 5K

Littleton, CO

Saturday, July 4th, 2026

View details for race HRCA Independence Day 5K

BRR All-Comers Summer Track & Field Series #3

Boulder, CO

Thursday, July 9th, 2026

1 Mile

View details for race BRR All-Comers Summer Track & Field Series #3

DRMABPsi 1–5K Walk, Run & Roll

Denver, CO

Saturday, July 11th, 2026

View details for race DRMABPsi 1–5K Walk, Run & Roll

All-Out Dog Days

Westminster, CO

Saturday, July 11th, 2026

Half

10K

Trail

View details for race All-Out Dog Days

Heatwave Half Marathon - Denver

Littleton, CO

Saturday, July 11th, 2026

1 Mile

10K

View details for race Heatwave Half Marathon - Denver

Heatwave Half Marathon - Denver

Denver, CO

Saturday, July 11th, 2026

1 Mile

10K

View details for race Heatwave Half Marathon - Denver

Cookie Chase

Denver, CO

Saturday, July 11th, 2026

Fast

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Heatwave Half Marathon - Colorado Springs

Colorado Springs, CO

Sunday, July 12th, 2026

1 Mile

10K

View details for race Heatwave Half Marathon - Colorado Springs

Diplo's Run Club Denver

Denver, CO

Sunday, July 12th, 2026

Code:FTR10

View details for race Diplo's Run Club Denver

PNAAF 5K Wellness Challenge

Colorado Springs, CO

Thursday, July 16th, 2026

View details for race PNAAF 5K Wellness Challenge

CU Anschutz Run Club 5K

Aurora, CO

Saturday, July 18th, 2026

View details for race CU Anschutz Run Club 5K

Summer Splash Prairie Dog Half, 10k, & 5k

Castle Rock, CO

Saturday, July 18th, 2026

Half

10K

Trail

View details for race Summer Splash Prairie Dog Half, 10k, & 5k

Heritage Eagles 5K

Littleton, CO

Saturday, July 18th, 2026

Fast

View details for race Heritage Eagles 5K

The Hero's Journey 5K

Aurora, CO

Saturday, July 25th, 2026

Trail

View details for race The Hero's Journey 5K

Spirit of the West 5K Run/Walk

Golden, CO

Sunday, July 26th, 2026

View details for race Spirit of the West 5K Run/Walk

STEPS TO EMPOWER

Colorado Springs, CO

Saturday, August 1st, 2026

View details for race STEPS TO EMPOWER

Popsicle 5K/10K/Half - Colorado Springs

Colorado Springs, CO

Saturday, August 1st, 2026

10K

Half

Fast

View details for race Popsicle 5K/10K/Half - Colorado Springs

Move with MADD Denver 5k and Walk

Denver, CO

Saturday, August 1st, 2026

View details for race Move with MADD Denver 5k and Walk

Unicorn 5k (South)

Highlands Ranch, CO

Saturday, August 1st, 2026

View details for race Unicorn 5k (South)

12th Annual Run for the Ring

Aurora, CO

Saturday, August 1st, 2026

View details for race 12th Annual Run for the Ring

RMRR August Trophy Series

Centennial, CO

Friday, August 7th, 2026

View details for race RMRR August Trophy Series

Summer Sizzler- Denver

Thornton, CO

Saturday, August 8th, 2026

1 Mile

10K

View details for race Summer Sizzler- Denver

Summer Sizzler- Denver

Denver, CO

Saturday, August 8th, 2026

1 Mile

10K

View details for race Summer Sizzler- Denver

All-Out Runapalooza

Arvada, CO

Saturday, August 8th, 2026

Half

10K

Trail

View details for race All-Out Runapalooza

Arapahoe Warrior 5K

Centennial, CO

Saturday, August 8th, 2026

View details for race Arapahoe Warrior 5K

Summer Sizzler- Colorado Springs

Colorado Springs, CO

Sunday, August 9th, 2026

1 Mile

10K

View details for race Summer Sizzler- Colorado Springs

The Bullfrog Summer Surge

Lakewood, CO

Sunday, August 9th, 2026

View details for race The Bullfrog Summer Surge

Pancake Stampede 5K

Littleton, CO

Sunday, August 9th, 2026

View details for race Pancake Stampede 5K

The Cheyenne Mountain Run

Colorado Springs, CO

Saturday, August 15th, 2026

10K

Trail

View details for race The Cheyenne Mountain Run

Miles for Migraine Colorado

Denver, CO

Saturday, August 15th, 2026

View details for race Miles for Migraine Colorado

Erie Half & 5k

Erie, CO

Sunday, August 16th, 2026

Half

View details for race Erie Half & 5k

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