Upcoming Races Near Windsor, CO

Santa's Dash for Ca$h

Denver, CO

Saturday, December 20th, 2025

Featured

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Ugly Sweater 5K

Denver, CO

Sunday, December 21st, 2025

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Candy Cane Course - Denver

Denver, CO

Saturday, December 27th, 2025

1 Mile

12K

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Candy Cane Course - Denver

Westminster, CO

Saturday, December 27th, 2025

1 Mile

12K

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TEST RACE

Boulder, CO

Wednesday, December 31st, 2025

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Resolution Run - Fort Collins

Fort Collins, CO

Wednesday, December 31st, 2025

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Resolution Run 5K

Fort Collins, CO

Wednesday, December 31st, 2025

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Resolute Runner 5k

Arvada, CO

Thursday, January 1st, 2026

Trail

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Segment Showdown

Fort Collins, CO

Thursday, January 1st, 2026

View details for race Segment Showdown

Hair of the Jog - Shoes & Brews New Year's Run ...

Longmont, CO

Thursday, January 1st, 2026

View details for race Hair of the Jog - Shoes & Brews New Year's Run Club 6k Run and Cheers

RunningU/Horsetooth Half Marathon Training

Fort Collins, CO

Sunday, January 4th, 2026

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All-Out Polar Prowl

Arvada, CO

Saturday, January 10th, 2026

Half

10K

Trail

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Fossil Creek Park T&H 5K

Fort Collins, CO

Sunday, January 11th, 2026

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Arctic Prairie Dog 10k & 5k

Louisville, CO

Sunday, January 18th, 2026

Half

10K

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Colorado Cold Rush

Louisville, CO

Sunday, January 18th, 2026

10K

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Polar Bear Run and Plunge

Fort Collins, CO

Saturday, January 24th, 2026

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Freakin Freezin 5K - Denver

Denver, CO

Sunday, January 25th, 2026

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Westy Winter Waggle 5&10k

Westminster, CO

Saturday, February 7th, 2026

10K

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Sweetheart Classic

Loveland, CO

Saturday, February 14th, 2026

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Heart Throb 5k

Arvada, CO

Saturday, February 14th, 2026

Fast

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Ralston Creek Half Marathon & 5k

Arvada, CO

Sunday, February 15th, 2026

Trail

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Bacon Strip Race

Fort Collins, CO

Sunday, February 22nd, 2026

10 Miles

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All-Out Mardi Crawl

Arvada, CO

Sunday, February 22nd, 2026

Half

10K

Trail

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

Denver, CO

Saturday, February 28th, 2026

10K

Half

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Sharin' O' The Green 5k

Fort Collins, CO

Saturday, March 14th, 2026

Fast

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Erin Go Bragh 7.77k

Westminster, CO

Saturday, March 14th, 2026

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

Severance, CO

Saturday, March 14th, 2026

10K

15K

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Lucky Brew Race 5K, 10K, and 15K

Windsor, CO

Saturday, March 21st, 2026

10K

15K

Trail

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Central Park 5k

Denver, CO

Sunday, March 22nd, 2026

Fast

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Cryogenic Cannibal Chase

Estes Park, CO

Saturday, March 28th, 2026

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Spring Equinox

Wellington, CO

Sunday, March 29th, 2026

Half

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Run the Ranch

Loveland, CO

Friday, April 10th, 2026

10K

Trail

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Donut Dash

Denver, CO

Sunday, April 12th, 2026

Fast

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

Arvada, CO

Sunday, April 12th, 2026

Half

10K

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Healthy Kids Running Series Spring 2026 - Denve...

Denver, CO

Sunday, April 12th, 2026

View details for race Healthy Kids Running Series Spring 2026 - Denver, CO

Prairie Dog Run Series

Louisville, CO

Sunday, April 12th, 2026

Half

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All-Out Beat the Heat

Westminster, CO

Saturday, April 18th, 2026

Half

10K

Trail

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Great Western Trail Race

Severance, CO

Saturday, April 18th, 2026

10K

Half

Trail

Fast

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Horsetooth Half Marathon

Fort Collins, CO

Sunday, April 19th, 2026

Half

Trail

Fast

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Bigfoot Half Marathon

Estes Park, CO

Saturday, April 25th, 2026

Half

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Runs With Scissors Races

Brighton, CO

Saturday, April 25th, 2026

Half

Marathon

Ultra

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Unicorn 5k (Denver-East)

Denver, CO

Sunday, April 26th, 2026

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Friends of the National Center Science Stride 5K

Boulder, CO

Friday, May 1st, 2026

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The Colorado Marathon

Fort Collins, CO

Sunday, May 3rd, 2026

Marathon

Half

10K

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Longmont Half & 5k (LM Half)

Longmont, CO

Sunday, May 3rd, 2026

Half

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Run For The Trees - 2 Mile Fun Run

Loveland, CO

Saturday, May 9th, 2026

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Quad Rock 25 & 50 Mile Trail Races

Bellvue, CO

Saturday, May 9th, 2026

Ultra

Trail

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Colorado Women's Classic - Westminster

Westminster, CO

Sunday, May 10th, 2026

10K

10 Miles

View details for race Colorado Women's Classic - Westminster

Hometown Half Marathon & 5k/10k - Denver

Denver, CO

Sunday, May 10th, 2026

10K

Half

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Dog Jog

Cheyenne, WY

Saturday, May 16th, 2026

View details for race Dog Jog

Explore more in Windsor, 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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