5K Races in Colorado — 2026

There are 298 5K races in Colorado scheduled for 2026. The next is the Bigfoot Half Marathon in Estes Park on April 25. Colorado 5K races run primarily April.

Sierra's 5K Run/Walk Race Against Meningitis

Sat, Jun 20 · Loveland, CO Loveland

5K RunKids Fun Run (10 & Under)

From $10 Open

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Run Juneteenth Day 5K/10K/13.1 DENVER/AURORA

Sat, Jun 20 · Centennial, CO Centennial

Family 1 Mile Fun RunVirtual Run Registration5K/10K/13.1 Eco-Registration (No Shirt) +3

From $30 Open

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Red, White and Brew 5k, 10k & Half Marathon

Sat, Jun 20 · Windsor, CO Windsor

1 Mile Fun Run5k Ruck5k run or walk +3

From $15 Open Closing Soon

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Strawberry Shortcut

Sun, Jun 21 · Glenwood Springs, CO Glenwood Springs

Nancy Reinisch MileWilley Coyote 5K10K

From $25 Closed

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

Sun, Jun 21 · Boulder, CO Boulder

In-Person 5K Run/Walk

From $30 Open

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Juneteenth Fun Run 5K

Sun, Jun 21 · Denver, CO Denver

5KKids 5K

From $25 Open Closing Soon

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Father's Day Classic 10k, 5k, & 1 Mile

Sun, Jun 21 · Arvada, CO Arvada

1 Mile Fun Run (untimed)Manly Mile (TIMED - for MEN Only)5K & Manly Mile (Men Only) +3

From $8 Open

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The Red Schoolhouse Run

Tue, Jun 23 · Louisville, CO Louisville

The Red Schoolhouse Run

From $30 Open

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BRR All-Comers Summer Track & Field Series #2

Thu, Jun 25 · Boulder, CO Boulder

Steeplechase (3000 + 2000)100m200m +11

From $20 Open 15 spots left

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SBT TRL

Sat, Jun 27 · Steamboat Springs, CO Steamboat Springs

5k10k

From $35.75 Open

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Pearl Street Mile

Sat, Jun 27 · Boulder, CO Boulder

Pearl Street MileKids 800m

From $15 Open

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Slacker Half Marathon-Relay-4-Mile Races

Sat, Jun 27 · Georgetown, CO Georgetown

4 Mile - Military Veteran4-MileVirtual 4 Mile +4

From $35 Open Closing Soon

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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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Before The Fourth 5k

Sat, Jun 27 · Littleton, CO Littleton

Before The Fourth 5k

From $35 Open

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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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Avery Brewing Co. 4K on the 4th

Sat, Jul 4 · Boulder, CO Boulder

Avery Brewing Co. 4K on the 4th

From $40 Open

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Burro Buster 5k

Sat, Jul 4 · Fairplay, CO Fairplay

5k

From $35 Closed

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FireKracker 5k

Sat, Jul 4 · Fort Collins, CO Fort Collins

Kids 1-MileFireKracker 5kElite 5k

From $5 Open

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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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Run for Chocolate 5K/10K/13.1 DENVER/AURORA

Sat, Jul 4 · Centennial, CO Centennial

Family 1 Mile Fun RunVirtual Run Registration5K/10K/13.1 Eco-Registration (No Shirt) +3

From $30 Open

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40th Annual Boogie's Buddy Race

Sat, Jul 4 · Aspen, CO Aspen

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

From $40 Open

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HRCA Independence Day 5K

Sat, Jul 4 · Littleton, CO Littleton

5K Run/Walk

From $40 Open

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July 4th Run 5K/10K/13.1 DENVER/AURORA

Sat, Jul 4 · Centennial, CO Centennial

Family Fun Run 1 Mile5K/10K/13.1 Eco-Registration (No Shirt)5K Registration +3

From $30 Open

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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 Closed

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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 Closed

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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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Loveland Liberty 5K

Sat, Jul 4 · Loveland, CO Loveland

5KVirtual 5K

From $35 Open Closing Soon

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Let Freedom Run 5k/10k - Louisville

Sat, Jul 4 · Louisville, CO Louisville

5k10k

From $30 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 - Middle School and High School StudentJuly 4 Fun Run - VIRTUAL RACE Elementary Student and YoungerJuly 4 Fun Run - VIRTUAL RACE - Adult +3

From $20 Open Closing Soon

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Sheep Creek Triathlon

Sat, Jul 4 · Antonito, CO Antonito

TriathlonShirt Purchase Only

From $20 Open

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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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Red, White, and WARRIOR 5K

Sat, Jul 4 · Grand Junction, CO Grand Junction

Red, White, and WARRIOR 5KLittle Sparkler Sprint

From $10 Open

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BRR All-Comers Summer Track & Field Series #3

Thu, Jul 9 · Boulder, CO Boulder

5000m100M200M +10

From $20 Open 15 spots left

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Pagosa Duathlon

Sat, Jul 11 · Pagosa Springs, CO Pagosa Springs

Dusty KidsDirty SprintDirty Du

From $15 Open

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Cookie Chase

Sat, Jul 11 · Denver, CO Denver

Virtual 5K5K

From $30 Open

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Heatwave Half Marathon - Denver

Sat, Jul 11 · Denver, CO Denver

1 Mile5 K10 K +5

From $17 Open 5 spots left

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All-Out Dog Days

Sat, Jul 11 · Westminster, CO Westminster

VIRTUAL 5K5KVIRTUAL 10K +3

From $25 Open

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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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Heatwave Half Marathon - Colorado Springs

Sun, Jul 12 · Colorado Springs, CO Colorado Springs

1 Mile5 K10 K +5

From $17 Open 5 spots left

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RMRR July Trophy Series

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

Virtual 5KPNAAF 5K Wellness Challenge

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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Spring Creek Memorial Trail Run

Sat, Jul 18 · Steamboat Springs, CO Steamboat Springs

5k9.5 Mile

From $25.75 Open 100 spots left

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

Sat, Jul 18 · Castle Rock, CO Castle Rock

5k10kHalf Marathon

From $25 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 · Englewood, CO Englewood

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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