Upcoming Half Marathon Races Near Fort Collins, CO

Name: All-Out Fa La La
Start: 2026-12-05
End: 2026-12-05
Location: Westminster

All-Out Polar Prowl

Arvada, CO

Saturday, January 10th, 2026

Featured

Half

10K

Trail

View details for race All-Out Polar Prowl

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Arctic Prairie Dog Half, 10k & 5k

Louisville, CO

Sunday, January 18th, 2026

Half

10K

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

All-Out Mardi Crawl

Arvada, CO

Sunday, February 22nd, 2026

Half

10K

Trail

View details for race All-Out Mardi Crawl

Lucky Brew Race 5K, 10K, 15k & Half Marathon

Severance, CO

Saturday, March 14th, 2026

10K

15K

View details for race Lucky Brew Race 5K, 10K, 15k & Half Marathon

Spring Equinox

Wellington, CO

Sunday, March 29th, 2026

Half

View details for race Spring Equinox

Prairie Dog Run Series

Louisville, CO

Sunday, April 12th, 2026

Half

View details for race Prairie Dog Run Series

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

Arvada, CO

Sunday, April 12th, 2026

Half

10K

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

Great Western Trail Race

Severance, CO

Saturday, April 18th, 2026

10K

Half

Trail

Fast

View details for race Great Western Trail Race

All-Out Beat the Heat

Westminster, CO

Saturday, April 18th, 2026

Half

10K

Trail

View details for race All-Out Beat the Heat

Horsetooth Half Marathon - Presented by Fort Co...

Fort Collins, CO

Sunday, April 19th, 2026

Half

Trail

Fast

View details for race Horsetooth Half Marathon - Presented by Fort Collins Connexion

Runs With Scissors Races

Brighton, CO

Saturday, April 25th, 2026

Half

Marathon

Ultra

View details for race Runs With Scissors Races

Bigfoot Half Marathon

Estes Park, CO

Saturday, April 25th, 2026

Half

View details for race Bigfoot Half Marathon

Longmont Half & 5k (LM Half)

Longmont, CO

Sunday, May 3rd, 2026

Half

View details for race Longmont Half & 5k (LM Half)

The Colorado Marathon

Fort Collins, CO

Sunday, May 3rd, 2026

Marathon

Half

10K

View details for race The Colorado Marathon

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

Louisville, CO

Sunday, June 7th, 2026

Half

10K

Trail

View details for race Colorado 13er (Half Marathon/10k/5k)

All-Out Summer Breeze

Arvada, CO

Saturday, June 13th, 2026

Half

10K

Trail

View details for race All-Out Summer Breeze

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

Windsor, CO

Saturday, June 20th, 2026

10K

Half

View details for race Red, White and Brew 5k, 10k, Half Marathon & 12 Hour Last Person Standing

All-Out Dog Days

Westminster, CO

Saturday, July 11th, 2026

Half

10K

Trail

View details for race All-Out Dog Days

All-Out Runapalooza

Arvada, CO

Saturday, August 8th, 2026

Half

10K

Trail

View details for race All-Out Runapalooza

Erie Half & 5k

Erie, CO

Sunday, August 16th, 2026

Half

View details for race Erie Half & 5k

Pioneer Prairie Dog Half, 10k & 5k

Westminster, CO

Sunday, August 23rd, 2026

Half

10K

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

Black Squirrel Half Marathon

Bellvue, CO

Saturday, September 12th, 2026

Half

View details for race Black Squirrel Half Marathon

All-Out Fall Fest

Westminster, CO

Saturday, September 19th, 2026

Half

10K

Trail

View details for race All-Out Fall Fest

Red Feather Trail Jamboree

Red Feather Lakes, CO

Friday, September 25th, 2026

Ultra

Half

Trail

View details for race Red Feather Trail Jamboree

Windsor Marathon, Half Marathon, 10k, 5k & 1 Mi...

Windsor, CO

Sunday, October 4th, 2026

Marathon

Half

10K

Trail

View details for race Windsor Marathon, Half Marathon, 10k, 5k & 1 Mile Run

Westy Half & 5k

Westminster, CO

Sunday, October 11th, 2026

Half

View details for race Westy Half & 5k

TURKEY TREK (13.1, 10k, 5k & 2k)

Arvada, CO

Saturday, November 21st, 2026

Half

10K

Trail

View details for race TURKEY TREK (13.1, 10k, 5k & 2k)

All-Out Fa La La

Westminster, CO

Saturday, December 5th, 2026

Half

10K

Trail

View details for race All-Out Fa La La

Explore more in Fort Collins, CO

Distances:

5K 10K Half Marathon Marathon

Months:

December January February

Tags:

Trail Boston Qualifiers Fast Courses

State:

All Colorado races

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