5K Races in Colorado — 2026

There are 272 5K races in Colorado scheduled for 2026. The next is the HRCA Happy Hour Half K in Littleton on June 19. Colorado 5K races run primarily June.

HRCA Happy Hour Half K

Fri, Jun 19 · Littleton, CO Littleton

Half K

From $35 Open Closing Soon

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

Sat, Jun 20 · Windsor, CO Windsor

1 Mile Fun Run5k run or walk5k Ruck +3

From $15 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 Closing Soon

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Sloth Run 5K/10K/13.1 DENVER/AURORA

Sat, Jun 20 · Centennial, CO Centennial

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

From $30 Open Closing Soon

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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

Speedy Joe- For the most fierce competitorsFamilyLittle Joe- For the kids! +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)Youth 8-18 yrsAdult 5k

From $15 Open Closing Soon

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

Sat, Jun 20 · Centennial, CO Centennial

Family 1 Mile Fun Run5K/10K/13.1 Eco-Registration (No Shirt)Virtual Run Registration +3

From $30 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 Fun Run 5K

Sun, Jun 21 · Denver, CO Denver

Kids 5K5K

From $25 Open Closing Soon

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Strawberry Shortcut

Sun, Jun 21 · Glenwood Springs, CO Glenwood Springs

Nancy Reinisch MileWilley Coyote 5K10K

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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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 Closing Soon

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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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BRR All-Comers Summer Track & Field Series #2

Thu, Jun 25 · Boulder, CO Boulder

Steeplechase (3000 + 2000)100m200m +11

From $20 Open Closing Soon 15 spots left

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The Four Legged 5k

Fri, Jun 26 · Bailey, CO Bailey

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

From $10 Open Closing Soon

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SBT TRL

Sat, Jun 27 · Steamboat Springs, CO Steamboat Springs

5k10k

From $35.75 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 Mile - Individual ParticipantBeer Relay - Team of Two (only One Team Member Needs to Sign Up and Pay)FREE Yoga On Tap +1

From $0 Open Closing Soon 20 spots left

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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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Pearl Street Mile

Sat, Jun 27 · Boulder, CO Boulder

Pearl Street MileKids 800m

From $15 Open Closing Soon

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Trail Town Races

Sat, Jun 27 · Ridgway, CO Ridgway

The 5-Mile Run/WalkThe 10-Mile Run

From $25 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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Greeley Freedom 5k Walk & Run

Sat, Jul 4 · Greeley, CO Greeley

5k Walk5k Run

From $30 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 Registration +3

From $30 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 RegistrationVirtual Run Registration (5K/10K/13.1) +3

From $30 Open

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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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6th Annual July 4th ROCK-IT RUN

Sat, Jul 4 · Castle Rock, CO Castle Rock

5kHalf Marathon

From $43 Open Closing Soon

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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-MileElite 5kFireKracker 5k

From $5 Open

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

From $20 Open

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Loveland Liberty 5K

Sat, Jul 4 · Loveland, CO Loveland

5KVirtual 5K

From $35 Open 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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Let Freedom Run 5k/10k - Louisville

Sat, Jul 4 · Louisville, CO Louisville

5k10k

From $30 Open

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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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HRCA Independence Day 5K

Sat, Jul 4 · Littleton, CO Littleton

5K Run/Walk

From $40 Open

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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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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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