5K Races in Colorado — 2026

There are 154 5K races in Colorado scheduled for 2026. The next is the Unicorn 5k (North) in Thornton on June 20. Colorado 5K races run primarily June through May.

HRCA Happy Hour Half K

Fri, Jun 19 · Littleton, CO Littleton

Half K

From $35 Open Closing Soon

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Unicorn 5k (North)

Sat, Jun 20 · Thornton, CO Thornton

1/2 (ish) Mile Saunter - untimed5k Run/Walk

From $16 Open Closing Soon

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Havoc at HartFit OCR 3k

Sat, Jun 20 · Peyton, CO Peyton

KIDS HartFit HAVOC 1 MileHavoc at HartFit OCR 3k

From $29.99 Open 10 spots left

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2026 Doggie Dash

Sat, Jun 20 · Colorado Springs, CO Colorado Springs

2026 Doggie Dash 5K

From $35 Open

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Sierra's 5K Run/Walk Race Against Meningitis

Sat, Jun 20 · Loveland, CO Loveland

5K RunKids Fun Run (10 & Under)

From $10 Open Closing Soon

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Mustang Mile 2026

Sat, Jun 20 · Kremmling, CO Kremmling

FamilyRegular Joe- For the "off the couch" crewSpeedy Joe- For the most fierce competitors +2

From $10 Open Closing Soon

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Run for the River 5k Boulder

Sat, Jun 20 · Boulder, CO Boulder

Run for the River 5k Boulder

From $25 Open Closing Soon

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Fatherhood 5k Family Run/Walk

Sat, Jun 20 · Colorado Springs, CO Colorado Springs

Family Pricing (Immediate Family)Adult 5kYouth 8-18 yrs +1

From $15 Open Closing Soon

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Parker Parks and Recreation Dash Across the Dam Father’s Day 5K

Sat, Jun 20 · Parker, CO Parker

5K

From $40 Open Closing Soon

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Juneteenth 5K

Sun, Jun 21 · Denver, CO Denver

5KKids 5K

From $25 Open Closing Soon

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2026 CANCELED-14th Annual Buffs4Life Kyle MacIntosh Memorial 5K Run/Walk

Sun, Jun 21 · Boulder, CO Boulder

In-Person 5K Run/Walk

From $30 Closed

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VIRTUAL 14th Annual Buffs4Life Kyle MacIntosh Memorial 5K Run/Walk

Sun, Jun 21 · Boulder, CO Boulder

Virtual 5K Run/Walk

From $30 Closed

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The Red Schoolhouse Run

Tue, Jun 23 · Louisville, CO Louisville

The Red Schoolhouse Run

From $30 Open Closing Soon

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The Four Legged 5k

Fri, Jun 26 · Bailey, CO Bailey

Four Legged 5k - Adult (13 & Up)Four Legged 5k - Youth (12 & Under)

From $10 Open Closing Soon

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Before The Fourth 5k

Sat, Jun 27 · Littleton, CO Littleton

Before The Fourth 5k

From $35 Open Closing Soon

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Fitness Expo On Tap at the Colorado Tap House

Sat, Jun 27 · Arvada, CO Arvada

Beer Relay - Team of Two (only One Team Member Needs to Sign Up and Pay)Beer Mile - Individual ParticipantI want the Event Shirt! +1

From $0 Open Closing Soon 20 spots left

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Denver Pride 5K

Sat, Jun 27 · Denver, CO Denver

Denver Pride 5K

From $40 Open Closing Soon

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Greeley Freedom 5k Walk & Run

Sat, Jul 4 · Greeley, CO Greeley

5k Run5k Walk

From $30 Open Closing Soon

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Durango Main Avenue Mile

Sat, Jul 4 · Durango, CO Durango

Main Avenue Mile

From $15.81 Open

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HRCA Independence Day 5K

Sat, Jul 4 · Littleton, CO Littleton

5K Run/Walk

From $40 Open Closing Soon

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Burro Buster 5k

Sat, Jul 4 · Fairplay, CO Fairplay

5k

From $35 Open

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Avery Brewing Co. 4K on the 4th

Sat, Jul 4 · Boulder, CO Boulder

Avery Brewing Co. 4K on the 4th

From $40 Open Closing Soon

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Bayfield Firecracker 5K & 2K fun run/walk

Sat, Jul 4 · Bayfield, CO Bayfield

Firecracker 2kFirecracker 5k

From $20 Open

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Pueblo's Firecracker 5k!

Sat, Jul 4 · Pueblo, CO Pueblo

Pueblo's Firecracker 5k!

From $19 Open

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FireKracker 5k

Sat, Jul 4 · Fort Collins, CO Fort Collins

Kids 1-MileFireKracker 5kElite 5k

From $5 Open Closing Soon

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Let Freedom Run 5k - LONGMONT

Sat, Jul 4 · Longmont, CO Longmont

5k Run/Walk

From $30 Open

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Rendezvous Run for Independence

Sat, Jul 4 · Winter Park, CO Winter Park

Rendezvous Run for Independence 5K Run/Walk

From $40 Open

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Palmer Lake July 4th Fun Run

Sat, Jul 4 · Palmer Lake, CO Palmer Lake

July 4 Fun Run - VIRTUAL RACE Elementary Student and YoungerJuly 4 Fun Run - Elementary Student and YoungerJuly 4 Fun Run - Middle School and High School Student +3

From $20 Open Closing Soon

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Loveland Liberty 5K

Sat, Jul 4 · Loveland, CO Loveland

5KVirtual 5K

From $35 Open Closing Soon 1 spots left

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16th Annual Telluride Foundation Rundola: Run for Good

Sat, Jul 4 · Telluride, CO Telluride

2026 Rundola: Run for Good

From $45 Open Closing Soon

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Sheep Creek Triathlon

Sat, Jul 4 · Antonito, CO Antonito

TriathlonShirt Purchase Only

From $20 Open Closing Soon

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Red Feather Lakes 3.6 Mile Fun Run

Sat, Jul 4 · Red Feather Lakes, CO Red Feather Lakes

Red Feather Lakes 3.6 Mile Fun Run

From $40 Open

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4th of July Donut Hole Mile

Sat, Jul 4 · Arvada, CO Arvada

Donut Hole Mile

From $6 Open 80 spots left

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40th Annual Boogie's Buddy Race, Presented By Aspen Valley Health

Sat, Jul 4 · Aspen, CO Aspen

Boogie's Buddy 1-Mile Family Fun Run/Walk (Family Registration)Boogie's Buddy 5-Mile RaceBoogie's Buddy 5K Race

From $50 Open

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Cookie Chase

Sat, Jul 11 · Denver, CO Denver

5KVirtual 5K

From $30 Open

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Paint the Prairie

Sat, Jul 11 · Aurora, CO Aurora

Paint the Prairie Color Run

From $15 Open Closing Soon

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DRMABPsi 1–5K Walk, Run & Roll

Sat, Jul 11 · Denver, CO Denver

1k2kKids Run +3

From $10 Open Closing Soon

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Rocky Mountain State Games - Swim / Run

Sun, Jul 12 · Colorado Springs, CO Colorado Springs

Swim / Run - 5-8yrsSwim / Run - 9-15yrsSwim / Run - 16+ yrs

From $25 Open

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RMRR July 2mi & pancake breakfast

Sun, Jul 12 · Lakewood, CO Lakewood

2mi

From $10 Open

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PNAAF 5K Wellness Challenge

Thu, Jul 16 · Colorado Springs, CO Colorado Springs

PNAAF 5K Wellness ChallengeVirtual 5K

From $35 Open

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Festival in the Clouds Firefighter 5K, Fun Run and Doggie Dash

Sat, Jul 18 · Alma, CO Alma

5K Fun Run and Doggie Dash5K Fun Run and Doggie Dash - Youth Racer 6-125K Fun Run and Doggie Dash - Youth Racer 5 and Under

From $0 Open

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49th Annual Manassa Pioneer Days 5K Run

Sat, Jul 18 · Manassa, CO Manassa

5K Run

From $20 Closed

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2026 OCA Colorado 5K Panda Run

Sat, Jul 18 · Denver, CO Denver

2026 OCA Colorado 1K Panda Walk2026 OCA Colorado 5K Panda Run

From $35 Open

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Heritage Eagles 5K

Sat, Jul 18 · Littleton, CO Littleton

Heritage Eagles 5K

From $25 Open Closing Soon

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CU Anschutz Run Club 5K

Sat, Jul 18 · Aurora, CO Aurora

5K without T-Shirt5K with T-Shirt

From $7 Open

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One Is Too Many: Veteran Suicide Awareness 5k and Kids Run

Sun, Jul 19 · Greeley, CO Greeley

1 Mile5k run or walk

From $15 Open Closing Soon

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Clear for Takeoff Virtual 5K

Mon, Jul 20 · Colorado Springs, CO Colorado Springs

Clear for Takeoff Virtual 5K

From $35 Open

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Flyin' Ryan Memorial 5k

Fri, Jul 24 · Loveland, CO Loveland

Flyin' Ryan Memorial 5k

From $25 Open

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Newbie to 5k

Sat, Jul 25 · Pueblo, CO Pueblo

Newbie to 5K

From $50 Closed

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2nd Annual Pancreatic Cancer Awareness in Honor of Diana Cantu - 5K Fun Run/Walk

Sat, Jul 25 · Alamosa, CO Alamosa

5k Run/walk - 18 & Over5k Run/walk - 16 & Under

From $18 Open

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