Upcoming 5K Races In Colorado, US in October, 2025

Flyin' Ryan Memorial 5k

Greeley, CO

Friday, October 3rd, 2025

5K

View details for race Flyin' Ryan Memorial 5k

I Can 5k

Thornton, CO

Saturday, October 4th, 2025

5K

View details for race I Can 5k

Not So Flatt Breast Cancer Awareness Run/Walk

Westminster, CO

Saturday, October 4th, 2025

10K

5K

View details for race Not So Flatt Breast Cancer Awareness Run/Walk

Colorado Springs Marathon, Half, 5K, and Kids K

Colorado Springs, CO

Saturday, October 4th, 2025

Marathon

Half

5K

View details for race Colorado Springs Marathon, Half, 5K, and Kids K

Big Waves Family 5K run/walk Whiteout Presented...

Westminster, CO

Saturday, October 4th, 2025

5K

View details for race Big Waves Family 5K run/walk Whiteout Presented by Brumate

Layafette Music Fest Half-Marathon/10K/5K

Louisville, CO

Sunday, October 5th, 2025

5K

Half

View details for race Layafette Music Fest Half-Marathon/10K/5K

RMRR October Trophy Series

Aurora, CO

Sunday, October 5th, 2025

5K

View details for race RMRR October Trophy Series

Windsor Marathon, Half Marathon, 10k & 5k

Windsor, CO

Sunday, October 5th, 2025

Marathon

Half

10K

View details for race Windsor Marathon, Half Marathon, 10k & 5k

Manitou 5K

Manitou Springs, CO

Saturday, October 11th, 2025

5K

View details for race Manitou 5K

The Long View Marathon

Fort Collins, CO

Saturday, October 11th, 2025

5K

Half

Marathon

View details for race The Long View Marathon

Gummball 5K

Brighton, CO

Saturday, October 11th, 2025

5K

View details for race Gummball 5K

Westy Half & 5k

Westminster, CO

Sunday, October 12th, 2025

5K

Half

View details for race Westy Half & 5k

Joy & Justice 5k

Timnath, CO

Sunday, October 12th, 2025

1 Mile

5K

View details for race Joy & Justice 5k

The bRUNch Run™

Denver, CO

Sunday, October 12th, 2025

10K

5K

15K

View details for race The bRUNch Run™

2025 DU Crimson Classic 5K Run/1.5 Mile Walk

Denver, CO

Tuesday, October 14th, 2025

5K

View details for race 2025 DU Crimson Classic 5K Run/1.5 Mile Walk

The Great Trailhead Foot Race 10 Miler & 5k

Lakewood, CO

Saturday, October 18th, 2025

10 Miles

5K

View details for race The Great Trailhead Foot Race 10 Miler & 5k

Homecoming 5k - Colorado State University

Fort Collins, CO

Saturday, October 18th, 2025

5K

View details for race Homecoming 5k - Colorado State University

Mancos Cowboy Half Marathon, 5K, and Fun Run

Mancos, CO

Saturday, October 18th, 2025

Half

5K

1 Mile

View details for race Mancos Cowboy Half Marathon, 5K, and Fun Run

Foundry Halloween 5k

Steamboat Springs, CO

Saturday, October 25th, 2025

5K

View details for race Foundry Halloween 5k

YMCA of Pueblo Spooky Sprint 5K

Pueblo, CO

Saturday, October 25th, 2025

5K

View details for race YMCA of Pueblo Spooky Sprint 5K

Apex Foundation Trick or Trot 5K & Kids' Hallow...

Arvada, CO

Saturday, October 25th, 2025

1 Mile

5K

View details for race Apex Foundation Trick or Trot 5K & Kids' Halloween Hunt

Race to Cure Sarcoma Denver

Denver, CO

Saturday, October 25th, 2025

5K

View details for race Race to Cure Sarcoma Denver

Ghosts and Goblins 5K/10K

Denver, CO

Sunday, October 26th, 2025

5K

View details for race Ghosts and Goblins 5K/10K

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