Upcoming Half Marathon Races Near Denver, CO in September, 2025

Name: Pioneer Prairie Dog Half, 10k & 5k
Start: 2025-09-27
End: 2025-09-27
Location: Westminster

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Labor Day Half Marathon

Parker, CO

Monday, September 1st, 2025

Half

10K

View details for race Labor Day Half Marathon

All-Out Fall Fest

Westminster, CO

Saturday, September 13th, 2025

Half

10K

View details for race All-Out Fall Fest

National Chocolate Day: Run for Chocolates DENV...

Centennial, CO

Saturday, September 13th, 2025

10K

1 Mile

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

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

National Singles Day: Singles & Friends Running...

Centennial, CO

Saturday, September 27th, 2025

10K

1 Mile

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

1 Mile

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

Pioneer Prairie Dog Half, 10k & 5k

Westminster, CO

Saturday, September 27th, 2025

10K

Half

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