Upcoming Races Near Boulder, CO

Name: All-Out Spring Fever
Start: 2026-03-22
End: 2026-03-22
Location: Golden

Fleet Feet Denver Long Runs & Lattes

Littleton, CO

Sunday, December 7th, 2025

Featured

View details for race Fleet Feet Denver Long Runs & Lattes

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Boulder Long runs and Lattes

Boulder, CO

Sunday, December 7th, 2025

10K

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RMRR December Trophy Series

Denver, CO

Sunday, December 7th, 2025

Fast

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Spring Park T&H 6K

Fort Collins, CO

Sunday, December 7th, 2025

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Chase the Glow

Estes Park, CO

Friday, December 12th, 2025

1 Mile

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Santa Shuffle 2025

Littleton, CO

Saturday, December 13th, 2025

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Santa Shuffle 2024

Littleton, CO

Saturday, December 13th, 2025

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Superior Stocking Run

Superior, CO

Saturday, December 13th, 2025

Fast

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WinterFest 5k & Fun Run

Thornton, CO

Saturday, December 13th, 2025

View details for race WinterFest 5k & Fun Run

Santa Catch 5k & 10k

Windsor, CO

Saturday, December 13th, 2025

10K

1 Mile

Trail

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Main Street Kids Run / Walk

Longmont, CO

Saturday, December 13th, 2025

1 Mile

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2025 Jingle Bell Run - Colorado

Denver, CO

Sunday, December 14th, 2025

1 Mile

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Run the Ranch Training Runs

Loveland, CO

Sunday, December 14th, 2025

View details for race Run the Ranch Training Runs

Santa's Dash for Ca$h

Denver, CO

Saturday, December 20th, 2025

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Run Like a Reindeer 5K

Winter Park, CO

Saturday, December 20th, 2025

Trail

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Ugly Sweater 5K

Denver, CO

Sunday, December 21st, 2025

Trail

Fast

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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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Resolution Run - Fort Collins

Fort Collins, CO

Wednesday, December 31st, 2025

View details for race Resolution Run - Fort Collins

Steve's Event Page

Morrison, CO

Wednesday, December 31st, 2025

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TEST RACE

Boulder, CO

Wednesday, December 31st, 2025

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Resolution Run 5K

Fort Collins, CO

Wednesday, December 31st, 2025

View details for race Resolution Run 5K

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

Resolute Runner 5k

Arvada, CO

Thursday, January 1st, 2026

Trail

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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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Sentinel Flurry

Golden, CO

Saturday, January 10th, 2026

1 Mile

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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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Yeti Chase 5k/10k

Morrison, CO

Sunday, January 25th, 2026

10K

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Freakin Freezin 5K - Denver

Denver, CO

Sunday, January 25th, 2026

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Running Up for Air - Staunton Rocks

Pine, CO

Friday, February 6th, 2026

Trail

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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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Parker Parks and Recreation Love 'em or Leave '...

Parker, CO

Saturday, February 14th, 2026

10K

View details for race Parker Parks and Recreation Love 'em or Leave 'em Valentine's Day 5K/10K

Ralston Creek Half Marathon & 5k

Arvada, CO

Sunday, February 15th, 2026

Trail

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Chilly Cheeks Duathlon

Englewood, CO

Saturday, February 21st, 2026

Fast

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Highlands Ranch 5k

Highlands Ranch, CO

Sunday, February 22nd, 2026

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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

View details for race Time to Paddy 5k/10k & Lucky 13.1 - Denver

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

HRCA St. Patrick's Day 5K

Highlands Ranch, CO

Saturday, March 14th, 2026

View details for race HRCA St. Patrick's Day 5K

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

View details for race Erin Go Bragh 7.77k

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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All-Out Spring Fever

Golden, CO

Sunday, March 22nd, 2026

Half

10K

Trail

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Explore more in Boulder, 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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