Upcoming Races Near Boulder, CO

Name: NoCo Half Marathon & 10K
Start: 2026-04-25
End: 2026-04-25
Location: Loveland

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

Parker, CO

Saturday, February 14th, 2026

Featured

10K

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

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Sweetheart Classic

Loveland, CO

Saturday, February 14th, 2026

View details for race Sweetheart Classic

Heart Throb 5k

Arvada, CO

Saturday, February 14th, 2026

Fast

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Virginia Canyon is for Lovers

Idaho Springs, CO

Saturday, February 14th, 2026

Trail

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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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Bacon Strip Race

Fort Collins, CO

Sunday, February 22nd, 2026

10 Miles

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Highlands Ranch 5k

Highlands Ranch, CO

Sunday, February 22nd, 2026

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All-Out Mardi Crawl

Arvada, CO

Sunday, February 22nd, 2026

Half

10K

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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

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

Westminster, CO

Saturday, February 28th, 2026

10K

Half

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

RMRR March Trophy Series

Littleton, CO

Sunday, March 1st, 2026

Fast

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Lee Martinez Park T&H 10K

Fort Collins, CO

Sunday, March 1st, 2026

10K

View details for race Lee Martinez Park T&H 10K

4th Anniversary Beer and Donut Hole Miles

Arvada, CO

Saturday, March 7th, 2026

1 Mile

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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

View details for race Erin Go Bragh 7.77k

St. Paddy's Day Run

Berthoud, CO

Saturday, March 14th, 2026

View details for race St. Paddy's Day Run

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

Lucky Leprechaun 5K

Boulder, CO

Sunday, March 15th, 2026

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

Windsor, CO

Saturday, March 21st, 2026

10K

15K

Trail

View details for race Lucky Brew Race 5K, 10K, and 15K

All-Out Spring Fever

Golden, CO

Sunday, March 22nd, 2026

Half

10K

Trail

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Central Park 5k

Denver, CO

Sunday, March 22nd, 2026

Fast

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The City Park Circuit

Denver, CO

Saturday, March 28th, 2026

Fast

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Cryogenic Cannibal Chase

Estes Park, CO

Saturday, March 28th, 2026

View details for race Cryogenic Cannibal Chase

RMRR Spring Marathon Training Series #1

Thornton, CO

Sunday, March 29th, 2026

10 Miles

Ultra

View details for race RMRR Spring Marathon Training Series #1

Spring Equinox

Wellington, CO

Sunday, March 29th, 2026

Half

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Three Creeks Half Marathon

Englewood, CO

Sunday, April 5th, 2026

Half

Trail

Fast

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Hot Laps - Denver

Denver, CO

Thursday, April 9th, 2026

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Run the Ranch

Loveland, CO

Friday, April 10th, 2026

10K

Trail

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CRMAC Uplift Her - 5K Run/Walk

Fort Collins, CO

Saturday, April 11th, 2026

View details for race CRMAC Uplift Her - 5K Run/Walk

Dash for Detection: Oral Cancer Awareness 5K

Denver, CO

Saturday, April 11th, 2026

View details for race Dash for Detection: Oral Cancer Awareness 5K

Rockin on the River 5K

Littleton, CO

Saturday, April 11th, 2026

Trail

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RMRR Spring Marathon Training Series #2

Thornton, CO

Saturday, April 11th, 2026

10 Miles

Ultra

View details for race RMRR Spring Marathon Training Series #2

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

Boulder Track Series Meet 1

Longmont, CO

Sunday, April 12th, 2026

1 Mile

View details for race Boulder Track Series Meet 1

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

Healthy Kids Running Series Spring 2026 - Fort ...

Fort Collins, CO

Sunday, April 12th, 2026

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

Hop Into Spring 5K - Denver

Denver, CO

Sunday, April 12th, 2026

View details for race Hop Into Spring 5K - Denver

Healthy Kids Running Series Spring 2026 - Auror...

Aurora, CO

Sunday, April 12th, 2026

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

Platte River Half-Marathon and Relay

Littleton, CO

Sunday, April 12th, 2026

Half

Trail

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Donut Dash

Denver, CO

Sunday, April 12th, 2026

Fast

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RMRR April Trophy Series

Denver, CO

Sunday, April 12th, 2026

View details for race RMRR April Trophy Series

Prairie Dog Run Series

Louisville, CO

Sunday, April 12th, 2026

Half

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Great Western Trail Race

Severance, CO

Saturday, April 18th, 2026

10K

Half

Trail

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All-Out Beat the Heat

Westminster, CO

Saturday, April 18th, 2026

Half

10K

Trail

View details for race All-Out Beat the Heat

DoNot Stop Half Marathon (5k/10k) - Denver

Littleton, CO

Sunday, April 19th, 2026

10K

1 Mile

View details for race DoNot Stop Half Marathon (5k/10k) - Denver

Horsetooth Half Marathon - Presented by Fort Co...

Fort Collins, CO

Sunday, April 19th, 2026

Half

Fast

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

2026 Fairmount Fit Fest

Golden, CO

Sunday, April 19th, 2026

View details for race 2026 Fairmount Fit Fest

NoCo Half Marathon & 10K

Loveland, CO

Saturday, April 25th, 2026

10K

Half

View details for race NoCo Half Marathon & 10K

Explore more in Boulder, CO

Distances:

5K 10K Half Marathon Marathon

Months:

February March April

Tags:

Trail Boston Qualifiers Fast Courses

State:

All Colorado races

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