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Upcoming Half Marathon Races Near Windsor, CO

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13th Annual Superhero Event logo

13th Annual Superhero Event

Greeley, CO

Saturday, September 20th, 2025

10K
5K
1 Mile
View details for race 13th Annual Superhero Event
Red Feather Trail Jamboree logo

Red Feather Trail Jamboree

Red Feather Lakes, CO

Friday, September 26th, 2025

Half
Ultra
Trail
View details for race Red Feather Trail Jamboree
Pioneer Prairie Dog Half, 10k & 5k logo

Pioneer Prairie Dog Half, 10k & 5k

Westminster, CO

Saturday, September 27th, 2025

Half
10K
5K
View details for race Pioneer Prairie Dog Half, 10k & 5k
Windsor Marathon, Half Marathon, 10k & 5k logo

Windsor Marathon, Half Marathon, 10k & 5k

Windsor, CO

Sunday, October 5th, 2025

Marathon
Half
10K
Trail
View details for race Windsor Marathon, Half Marathon, 10k & 5k
Layafette Music Fest Half-Marathon/10K/5K logo

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
The Long View Marathon logo

The Long View Marathon

Fort Collins, CO

Saturday, October 11th, 2025

Marathon
Half
5K
View details for race The Long View Marathon
Westy Half & 5k logo

Westy Half & 5k

Westminster, CO

Sunday, October 12th, 2025

Half
5K
View details for race Westy Half & 5k
Blue Sky Marathon & Half logo

Blue Sky Marathon & Half

Fort Collins, CO

Saturday, October 18th, 2025

Half
Marathon
View details for race Blue Sky Marathon & Half
10k Turkey Trek & 5k Turkey Trot - Now With HALF MARATHON DISTANCE! logo

10k Turkey Trek & 5k Turkey Trot - Now With HAL...

Arvada, CO

Saturday, November 22nd, 2025

Half
10K
5K
Trail
View details for race 10k Turkey Trek & 5k Turkey Trot - Now With HALF MARATHON DISTANCE!
All-Out Fa La La logo

All-Out Fa La La

Westminster, CO

Saturday, December 6th, 2025

Half
10K
5K
View details for race All-Out Fa La La
All-Out Polar Prowl logo

All-Out Polar Prowl

Arvada, CO

Saturday, January 10th, 2026

Half
10K
5K
View details for race All-Out Polar Prowl
Arctic Prairie Dog Half, 10k & 5k logo

Arctic Prairie Dog Half, 10k & 5k

Louisville, CO

Sunday, January 18th, 2026

Half
10K
5K
View details for race Arctic Prairie Dog Half, 10k & 5k
All-Out Mardi Crawl logo

All-Out Mardi Crawl

Arvada, CO

Sunday, February 22nd, 2026

Half
10K
5K
View details for race All-Out Mardi Crawl
Time to Paddy 5k/10k & Lucky 13.1 - Denver logo

Time to Paddy 5k/10k & Lucky 13.1 - Denver

Denver, CO

Saturday, February 28th, 2026

5K
10K
Half
View details for race Time to Paddy 5k/10k & Lucky 13.1 - Denver
Spring Fling Prairie Dog Half, 10k, & 5k logo

Spring Fling Prairie Dog Half, 10k, & 5k

Arvada, CO

Sunday, April 12th, 2026

Half
5K
10K
View details for race Spring Fling Prairie Dog Half, 10k, & 5k
Great Western Trail Race logo

Great Western Trail Race

Severance, CO

Saturday, April 18th, 2026

5K
10K
Half
Trail
Fast
View details for race Great Western Trail Race
All-Out Beat the Heat logo

All-Out Beat the Heat

Westminster, CO

Saturday, April 18th, 2026

Half
10K
5K
View details for race All-Out Beat the Heat
Horsetooth Half Marathon logo

Horsetooth Half Marathon

Fort Collins, CO

Sunday, April 19th, 2026

Half
Trail
Fast
View details for race Horsetooth Half Marathon
Runs With Scissors Races logo

Runs With Scissors Races

Brighton, CO

Saturday, April 25th, 2026

Half
Marathon
Ultra
View details for race Runs With Scissors Races
The Colorado Marathon logo

The Colorado Marathon

Fort Collins, CO

Sunday, May 3rd, 2026

Marathon
Half
10K
BQ
View details for race The Colorado Marathon
Longmont Half & 5k (LM Half) logo

Longmont Half & 5k (LM Half)

Longmont, CO

Sunday, May 3rd, 2026

Half
5K
View details for race Longmont Half & 5k (LM Half)
Hometown Half Marathon & 5k/10k - Denver logo

Hometown Half Marathon & 5k/10k - Denver

Denver, CO

Sunday, May 10th, 2026

5K
10K
Half
View details for race Hometown Half Marathon & 5k/10k - Denver
Colorado 13er (Half Marathon/10k/5k) logo

Colorado 13er (Half Marathon/10k/5k)

Louisville, CO

Sunday, June 7th, 2026

Half
10K
5K
Trail
View details for race Colorado 13er (Half Marathon/10k/5k)
All-Out Summer Breeze logo

All-Out Summer Breeze

Arvada, CO

Saturday, June 13th, 2026

Half
10K
5K
View details for race All-Out Summer Breeze
Red, White and Brew 5k, 10k, Half Marathon & 12 Hour Last Person Standing logo

Red, White and Brew 5k, 10k, Half Marathon & 12...

Windsor, CO

Saturday, June 20th, 2026

5K
10K
Half
View details for race Red, White and Brew 5k, 10k, Half Marathon & 12 Hour Last Person Standing
All-Out Dog Days logo

All-Out Dog Days

Westminster, CO

Saturday, July 11th, 2026

Half
10K
5K
View details for race All-Out Dog Days
Erie Half & 5k logo

Erie Half & 5k

Erie, CO

Sunday, August 16th, 2026

Half
5K
View details for race Erie Half & 5k

Explore more in Windsor, CO

Distances:

5K10KHalf MarathonMarathon

Months:

SeptemberOctoberNovember

Tags:

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State:

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