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Upcoming Half Marathon Races Near Granby, CO

All-Out Fa La La

Westminster, CO

Saturday, December 6th, 2025

Featured

Half

10K

5K

Trail

View details for race All-Out Fa La La

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All-Out Polar Prowl

Arvada, CO

Saturday, January 10th, 2026

Half

10K

5K

Trail

View details for race All-Out Polar Prowl

Arctic Prairie Dog 10k & 5k

Louisville, CO

Sunday, January 18th, 2026

Half

10K

5K

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

All-Out Mardi Crawl

Arvada, CO

Sunday, February 22nd, 2026

Half

10K

5K

Trail

View details for race All-Out Mardi Crawl

All-Out Spring Fever

Golden, CO

Sunday, March 22nd, 2026

Half

10K

5K

Trail

View details for race All-Out Spring Fever

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

Arvada, CO

Sunday, April 12th, 2026

Half

10K

5K

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

Prairie Dog Run Series

Louisville, CO

Sunday, April 12th, 2026

Half

View details for race Prairie Dog Run Series

All-Out Beat the Heat

Westminster, CO

Saturday, April 18th, 2026

Half

10K

5K

Trail

View details for race All-Out Beat the Heat

Bigfoot Half Marathon

Estes Park, CO

Saturday, April 25th, 2026

Half

5K

View details for race Bigfoot Half Marathon

Longmont Half & 5k (LM Half)

Longmont, CO

Sunday, May 3rd, 2026

Half

5K

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

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

Arvada, CO

Saturday, June 13th, 2026

Half

10K

5K

Trail

View details for race All-Out Summer Breeze

All-Out Dog Days

Westminster, CO

Saturday, July 11th, 2026

Half

10K

5K

Trail

View details for race All-Out Dog Days

All-Out Runapalooza

Arvada, CO

Saturday, August 8th, 2026

Half

10K

5K

Trail

View details for race All-Out Runapalooza

Erie Half & 5k

Erie, CO

Sunday, August 16th, 2026

Half

5K

View details for race Erie Half & 5k

Byers Peak Stampede Half Marathon & 5K Run

Fraser, CO

Saturday, August 22nd, 2026

Half

5K

Trail

View details for race Byers Peak Stampede Half Marathon & 5K Run

Pioneer Prairie Dog Half, 10k & 5k

Westminster, CO

Sunday, August 23rd, 2026

Half

10K

5K

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

All-Out Fall Fest

Westminster, CO

Saturday, September 19th, 2026

Half

10K

5K

Trail

View details for race All-Out Fall Fest

Westy Half & 5k

Westminster, CO

Sunday, October 11th, 2026

Half

5K

View details for race Westy Half & 5k

All-Out Kooky-Spooky

Golden, CO

Sunday, November 1st, 2026

Half

10K

5K

Trail

View details for race All-Out Kooky-Spooky

Turkey Trails- Denver

Lakewood, CO

Saturday, November 7th, 2026

1 Mile

5K

10K

View details for race Turkey Trails- Denver

Explore more in Granby, CO

Distances:

5K 10K Half Marathon Marathon

Months:

November December January

Tags:

Trail Boston Qualifiers Fast Courses

State:

All Colorado races

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