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

Name: 14er Fest 14K & 5K
Start: 2025-09-28
End: 2025-09-28
Location: Buena Vista

Labor Day Half Marathon

Parker, CO

Monday, September 1st, 2025

Half

10K

Fast

View details for race Labor Day Half Marathon

Oak Creek No Fun Run

Oak Creek, CO

Monday, September 1st, 2025

View details for race Oak Creek No Fun Run

3rd Annual Roost Rebellion Relays

Denver, CO

Wednesday, September 3rd, 2025

View details for race 3rd Annual Roost Rebellion Relays

RexRun For PAWSitivity 2025 5K Trail Run/Walk

Aurora, CO

Saturday, September 6th, 2025

1 Mile

Trail

View details for race RexRun For PAWSitivity 2025 5K Trail Run/Walk

Rebel Run 5k

Denver, CO

Sunday, September 7th, 2025

View details for race Rebel Run 5k

Flyin' Lion 5K

Littleton, CO

Sunday, September 7th, 2025

View details for race Flyin' Lion 5K

Denver Rocks Run 5K/10K

Denver, CO

Sunday, September 7th, 2025

View details for race Denver Rocks Run 5K/10K

Conservation Colorado 5k

Denver, CO

Sunday, September 7th, 2025

View details for race Conservation Colorado 5k

RMRR September Trophy Series

Thornton, CO

Sunday, September 7th, 2025

10K

Fast

View details for race RMRR September Trophy Series

National Chocolate Day: Run for Chocolates DENV...

Centennial, CO

Saturday, September 13th, 2025

10K

Half

View details for race National Chocolate Day: Run for Chocolates DENVER/AURORA

Muddy Dash | Denver

Erie, CO

Saturday, September 13th, 2025

View details for race Muddy Dash | Denver

Spirit of the Valley 5k

Grand Junction, CO

Saturday, September 13th, 2025

View details for race Spirit of the Valley 5k

Spooky Sprint - Colorado Springs

Colorado Springs, CO

Saturday, September 13th, 2025

10K

View details for race Spooky Sprint - Colorado Springs

Historic Elizabeth Main Street 5K & Family Colo...

Elizabeth, CO

Saturday, September 13th, 2025

1 Mile

View details for race Historic Elizabeth Main Street 5K & Family Color Run

Break Your Neck: Walk, Run, or Roll

Pueblo, CO

Saturday, September 13th, 2025

View details for race Break Your Neck: Walk, Run, or Roll

Parker Parks and Recreation So Long to Summer 5...

Parker, CO

Saturday, September 13th, 2025

10K

View details for race Parker Parks and Recreation So Long to Summer 5K/10K

The Denver 5k

Denver, CO

Saturday, September 13th, 2025

View details for race The Denver 5k

All-Out Fall Fest

Westminster, CO

Saturday, September 13th, 2025

Half

10K

Trail

View details for race All-Out Fall Fest

9/11 Heroes Run - Denver, Colorado

Denver, CO

Sunday, September 14th, 2025

1 Mile

View details for race 9/11 Heroes Run - Denver, Colorado

Spooky Sprint - Denver

Littleton, CO

Sunday, September 14th, 2025

1 Mile

10K

View details for race Spooky Sprint - Denver

Spooky Sprint - Denver

Denver, CO

Sunday, September 14th, 2025

10K

1 Mile

View details for race Spooky Sprint - Denver

13th Annual Superhero Event

Greeley, CO

Saturday, September 20th, 2025

10K

1 Mile

View details for race 13th Annual Superhero Event

Autumn Run

Buena Vista, CO

Saturday, September 20th, 2025

Half

10K

View details for race Autumn Run

Rim to Rim Royal Gorge Races: 5K Road Run, Trai...

Canon City, CO

Saturday, September 20th, 2025

Half

10K

Trail

View details for race Rim to Rim Royal Gorge Races: 5K Road Run, Trail 8 Mile, Trail Half Marathon

2025 Montbello Alive! 5K

Denver, CO

Saturday, September 20th, 2025

View details for race 2025 Montbello Alive! 5K

Move Forward 5K & 10K

Denver, CO

Saturday, September 20th, 2025

10K

View details for race Move Forward 5K & 10K

Miles 4 Madison 5K & 1K

Littleton, CO

Saturday, September 20th, 2025

View details for race Miles 4 Madison 5K & 1K

2025 ColorFest Color Run/Walk 5K

Pagosa Springs, CO

Saturday, September 20th, 2025

View details for race 2025 ColorFest Color Run/Walk 5K

Tiger Prowl 5K

Denver, CO

Sunday, September 21st, 2025

View details for race Tiger Prowl 5K

All Hands on Deck The Pirates 5K

Colorado Springs, CO

Sunday, September 21st, 2025

View details for race All Hands on Deck The Pirates 5K

19th Annual Golden Gallop

Golden, CO

Sunday, September 21st, 2025

10K

View details for race 19th Annual Golden Gallop

Farmers 5000

Wheat Ridge, CO

Sunday, September 21st, 2025

View details for race Farmers 5000

Race in the Clouds - Festival 5K

Alma, CO

Saturday, September 27th, 2025

Trail

View details for race Race in the Clouds - Festival 5K

National Singles Day: Singles & Friends Running...

Centennial, CO

Saturday, September 27th, 2025

10K

Half

View details for race National Singles Day: Singles & Friends Running DENVER/AURORA

National Coffee Day: Run for Coffee DENVER/AURORA

Centennial, CO

Saturday, September 27th, 2025

10K

Half

View details for race National Coffee Day: Run for Coffee DENVER/AURORA

McGinn Memorial Cross Country Challenge

Pagosa Springs, CO

Saturday, September 27th, 2025

View details for race McGinn Memorial Cross Country Challenge

Runway 5K - Run for the Angels

Broomfield, CO

Saturday, September 27th, 2025

View details for race Runway 5K - Run for the Angels

Bayfield Heritage Days 5k

Bayfield, CO

Saturday, September 27th, 2025

View details for race Bayfield Heritage Days 5k

Rising Phoenix Festival & 5K

Loveland, CO

Saturday, September 27th, 2025

View details for race Rising Phoenix Festival & 5K

Pioneer Prairie Dog Half, 10k & 5k

Westminster, CO

Saturday, September 27th, 2025

10K

Half

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

14er Fest 14K & 5K

Buena Vista, CO

Sunday, September 28th, 2025

Trail

View details for race 14er Fest 14K & 5K

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