157 Upcoming 5K Races Near Boulder, CO

Diplo's Run Club Denver

Denver, CO

Sunday, July 12th, 2026

Featured

Code:FTR10

View details for race Diplo's Run Club Denver

Heatwave Half Marathon - Denver

Denver, CO

Saturday, July 11th, 2026

1 Mile

10K

View details for race Heatwave Half Marathon - Denver

DRMABPsi 1–5K Walk, Run & Roll

Denver, CO

Saturday, July 11th, 2026

View details for race DRMABPsi 1–5K Walk, Run & Roll

All-Out Dog Days

Westminster, CO

Saturday, July 11th, 2026

Half

10K

Trail

View details for race All-Out Dog Days

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Heatwave Half Marathon - Denver

Littleton, CO

Saturday, July 11th, 2026

1 Mile

10K

View details for race Heatwave Half Marathon - Denver

Cookie Chase

Denver, CO

Saturday, July 11th, 2026

Fast

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Heritage Eagles 5K

Littleton, CO

Saturday, July 18th, 2026

Fast

View details for race Heritage Eagles 5K

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

Castle Rock, CO

Saturday, July 18th, 2026

Half

10K

Trail

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

CU Anschutz Run Club 5K

Aurora, CO

Saturday, July 18th, 2026

View details for race CU Anschutz Run Club 5K

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

Floyd Hill Dash

Idaho Springs, CO

Sunday, July 19th, 2026

View details for race Floyd Hill Dash

Flyin' Ryan Memorial 5k

Loveland, CO

Friday, July 24th, 2026

Fast

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Golddigger 5K

Idaho Springs, CO

Saturday, July 25th, 2026

View details for race Golddigger 5K

The Hero's Journey 5K

Aurora, CO

Saturday, July 25th, 2026

Trail

View details for race The Hero's Journey 5K

Spirit of the West 5K Run/Walk

Golden, CO

Sunday, July 26th, 2026

View details for race Spirit of the West 5K Run/Walk

Peak to Peak All Comers Meet

Nederland, CO

Friday, July 31st, 2026

Fast

View details for race Peak to Peak All Comers Meet

Move with MADD Denver 5K

Denver, CO

Saturday, August 1st, 2026

View details for race Move with MADD Denver 5K

12th Annual Run for the Ring

Aurora, CO

Saturday, August 1st, 2026

Trail

View details for race 12th Annual Run for the Ring

Unicorn 5k (South)

Highlands Ranch, CO

Saturday, August 1st, 2026

View details for race Unicorn 5k (South)

Move with MADD Denver 5k and Walk

Denver, CO

Saturday, August 1st, 2026

View details for race Move with MADD Denver 5k and Walk

Eltuck Valley 5K - Lory Summer Trail Series

Fort Collins, CO

Tuesday, August 4th, 2026

Trail

Fast

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RMRR August 5km and picnic

Centennial, CO

Friday, August 7th, 2026

View details for race RMRR August 5km and picnic

Choice City Running Festival

Fort Collins, CO

Friday, August 7th, 2026

1 Mile

Half

10K

View details for race Choice City Running Festival

Arapahoe Warrior 5K

Centennial, CO

Saturday, August 8th, 2026

View details for race Arapahoe Warrior 5K

All-Out Runapalooza

Arvada, CO

Saturday, August 8th, 2026

Half

10K

Trail

View details for race All-Out Runapalooza

Summer Sizzler- Denver

Denver, CO

Saturday, August 8th, 2026

1 Mile

10K

View details for race Summer Sizzler- Denver

Summer Sizzler- Denver

Thornton, CO

Saturday, August 8th, 2026

1 Mile

10K

View details for race Summer Sizzler- Denver

Pancake Stampede 5K

Littleton, CO

Sunday, August 9th, 2026

View details for race Pancake Stampede 5K

The Bullfrog Summer Surge

Lakewood, CO

Sunday, August 9th, 2026

View details for race The Bullfrog Summer Surge

Frontier Academy Community 5K

Greeley, CO

Saturday, August 15th, 2026

View details for race Frontier Academy Community 5K

Miles for Migraine - Colorado 2026

Denver, CO

Saturday, August 15th, 2026

View details for race Miles for Migraine - Colorado 2026

Sunrise Stampede

Longmont, CO

Saturday, August 15th, 2026

1 Mile

View details for race Sunrise Stampede

Miles for Migraine Colorado

Denver, CO

Saturday, August 15th, 2026

View details for race Miles for Migraine Colorado

Cancer League of Colorado Race 4 Research

Denver, CO

Sunday, August 16th, 2026

View details for race Cancer League of Colorado Race 4 Research

Erie Half & 5k

Erie, CO

Sunday, August 16th, 2026

Half

View details for race Erie Half & 5k

Into the Hills Eltuck 5k

Bellvue, CO

Tuesday, August 18th, 2026

Trail

Fast

View details for race Into the Hills Eltuck 5k

Rocky Mountain Lobo Invitational

Fort Collins, CO

Saturday, August 22nd, 2026

Trail

View details for race Rocky Mountain Lobo Invitational

2026 True Impact Ministries 5K/10K

Centennial, CO

Saturday, August 22nd, 2026

10K

Trail

View details for race 2026 True Impact Ministries 5K/10K

Coyote Chase 5k

Louisville, CO

Saturday, August 22nd, 2026

View details for race Coyote Chase 5k

Ram Run

Denver, CO

Saturday, August 22nd, 2026

1 Mile

View details for race Ram Run

Byers Peak Stampede Half Marathon & 5K Run

Fraser, CO

Saturday, August 22nd, 2026

Half

Trail

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

Rebel Run 5k

Denver, CO

Sunday, August 23rd, 2026

View details for race Rebel Run 5k

Pioneer Prairie Dog Half, 10k & 5k

Westminster, CO

Sunday, August 23rd, 2026

Half

10K

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

RexRun For PAWSitivity 2026 Trail Run/Walk

Aurora, CO

Saturday, August 29th, 2026

1 Mile

Trail

View details for race RexRun For PAWSitivity 2026 Trail Run/Walk

Glow & Roll: Illuminate What's Possible

Littleton, CO

Saturday, August 29th, 2026

1 Mile

View details for race Glow & Roll: Illuminate What's Possible

Run Like the Wind 5k / 2k / Dog Jog

Allenspark, CO

Saturday, August 29th, 2026

View details for race Run Like the Wind 5k / 2k / Dog Jog

Golden Harvest Half Marathon & 5k/10k - Denver

Westminster, CO

Saturday, September 5th, 2026

1 Mile

10K

View details for race Golden Harvest Half Marathon & 5k/10k - Denver

Demon Dash

Arvada, CO

Saturday, September 5th, 2026

View details for race Demon Dash

Golden Harvest Half Marathon & 5k/10k - Denver

Denver, CO

Saturday, September 5th, 2026

1 Mile

10K

View details for race Golden Harvest Half Marathon & 5k/10k - Denver

Recovery Run of the Rockies 5K

Fort Collins, CO

Saturday, September 5th, 2026

View details for race Recovery Run of the Rockies 5K

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