200 Upcoming Races Near Boulder, CO

Diplo's Run Club Denver

Denver, CO

Sunday, July 12th, 2026

Featured

Code:FTR10

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4th of July Donut Hole Mile

Arvada, CO

Saturday, July 4th, 2026

1 Mile

Trail

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Avery Brewing Co. 4K on the 4th

Boulder, CO

Saturday, July 4th, 2026

Fast

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6th Annual July 4th ROCK-IT RUN

Castle Rock, CO

Saturday, July 4th, 2026

Half

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Greeley Freedom 5k Walk & Run

Greeley, CO

Saturday, July 4th, 2026

View details for race Greeley Freedom 5k Walk & Run

FireKracker 5k

Fort Collins, CO

Saturday, July 4th, 2026

1 Mile

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Let Freedom Run 5k - LONGMONT

Longmont, CO

Saturday, July 4th, 2026

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Loveland Liberty 5K

Loveland, CO

Saturday, July 4th, 2026

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HRCA Independence Day 5K

Littleton, CO

Saturday, July 4th, 2026

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Let Freedom Run 5k/10k - Louisville

Louisville, CO

Saturday, July 4th, 2026

10K

View details for race Let Freedom Run 5k/10k - Louisville

BRR All-Comers Summer Track & Field Series #3

Boulder, CO

Thursday, July 9th, 2026

1 Mile

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Heatwave Half Marathon - Denver

Littleton, CO

Saturday, July 11th, 2026

1 Mile

10K

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All-Out Dog Days

Westminster, CO

Saturday, July 11th, 2026

Half

10K

Trail

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DRMABPsi 1–5K Walk, Run & Roll

Denver, CO

Saturday, July 11th, 2026

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Cookie Chase

Denver, CO

Saturday, July 11th, 2026

Fast

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Heatwave Half Marathon - Denver

Denver, CO

Saturday, July 11th, 2026

1 Mile

10K

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RMRR July 2mi & pancake breakfast

Lakewood, CO

Sunday, July 12th, 2026

Fast

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Berthoud Gastro-Dash 10k

Berthoud, CO

Saturday, July 18th, 2026

10K

Fast

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Heritage Eagles 5K

Littleton, CO

Saturday, July 18th, 2026

Fast

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Denver, CO Galloway Training Program

Denver, CO

Saturday, July 18th, 2026

View details for race Denver, CO Galloway Training Program

CU Anschutz Run Club 5K

Aurora, CO

Saturday, July 18th, 2026

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Summer Splash Prairie Dog Half, 10k, & 5k

Castle Rock, CO

Saturday, July 18th, 2026

Half

10K

Trail

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One Is Too Many: Veteran Suicide Awareness 5k a...

Greeley, CO

Sunday, July 19th, 2026

1 Mile

View details for race One Is Too Many: Veteran Suicide Awareness 5k and Kids Run

BRR All-Comers Summer Track & Field Series #4

Boulder, CO

Thursday, July 23rd, 2026

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Flyin' Ryan Memorial 5k

Loveland, CO

Friday, July 24th, 2026

Fast

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The Hero's Journey 5K

Aurora, CO

Saturday, July 25th, 2026

Trail

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Spirit of the West 5K Run/Walk

Golden, CO

Sunday, July 26th, 2026

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RunAbilities FUN Walk/Run/Roll

Parker, CO

Saturday, August 1st, 2026

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Move with MADD Denver 5k and Walk

Denver, CO

Saturday, August 1st, 2026

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12th Annual Run for the Ring

Aurora, CO

Saturday, August 1st, 2026

Trail

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Move with MADD Denver 5K

Denver, CO

Saturday, August 1st, 2026

View details for race Move with MADD Denver 5K

Unicorn 5k (South)

Highlands Ranch, CO

Saturday, August 1st, 2026

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Bound for Boston Marathon & Half Marathon - Denver

Denver, CO

Sunday, August 2nd, 2026

Marathon

Half

Fast

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Eltuck Valley 5K - Lory Summer Trail Series

Fort Collins, CO

Tuesday, August 4th, 2026

Trail

Fast

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Eldorado Run for the Cure

Eldorado Springs, CO

Thursday, August 6th, 2026

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BRR All-Comers Summer Track & Field Series #5

Boulder, CO

Thursday, August 6th, 2026

1 Mile

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Choice City Running Festival

Fort Collins, CO

Friday, August 7th, 2026

1 Mile

Half

10K

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RMRR August 5km and picnic

Centennial, CO

Friday, August 7th, 2026

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Dog Days of Summer

Longmont, CO

Saturday, August 8th, 2026

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Dog Days Of Summer 2026

Longmont, CO

Saturday, August 8th, 2026

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Summer Sizzler- Denver

Thornton, CO

Saturday, August 8th, 2026

1 Mile

10K

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Arapahoe Warrior 5K

Centennial, CO

Saturday, August 8th, 2026

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All-Out Runapalooza

Arvada, CO

Saturday, August 8th, 2026

Half

10K

Trail

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Summer Sizzler- Denver

Denver, CO

Saturday, August 8th, 2026

1 Mile

10K

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Pancake Stampede 5K

Littleton, CO

Sunday, August 9th, 2026

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The Bullfrog Summer Surge

Lakewood, CO

Sunday, August 9th, 2026

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The Berkeley Circuit

Denver, CO

Sunday, August 9th, 2026

1 Mile

Fast

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Into the Hills Eltuck 10k

Bellvue, CO

Tuesday, August 11th, 2026

10K

Trail

Fast

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Miles for Migraine Colorado

Denver, CO

Saturday, August 15th, 2026

View details for race Miles for Migraine Colorado

ThunderRidge Grizzly 2 Mile

Highlands Ranch, CO

Saturday, August 15th, 2026

1 Mile

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