Running Races in Colorado — 2026

There are 380 running races in Colorado in 2026 across 99 cities. The next upcoming race is the HRCA Happy Hour Half K in Littleton on June 19. Popular distances include 5K races, trail runs, half marathons.

HRCA Happy Hour Half K

Fri, Jun 19 · Littleton, CO Littleton

Road Half K

From $35 Open Closing Soon

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FCRC Marathon Training Program

Sat, Jun 20 · Fort Collins, CO Fort Collins

Road FCRC 2026 Marathon Training Program

From $20 Open

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Havoc at HartFit OCR 3k

Sat, Jun 20 · Peyton, CO Peyton

OCR KIDS HartFit HAVOC 1 MileHavoc at HartFit OCR 3k

From $29.99 Open 10 spots left

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

Sat, Jun 20 · Centennial, CO Centennial

Virtual Family Fun Run 1 Mile5K RegistrationVirtual Run Registration (5K/10K/13.1) +3

From $30 Open Closing Soon

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Mustang Mile 2026

Sat, Jun 20 · Kremmling, CO Kremmling

Road Little Joe- For the kids!Senior Joe- For the 65+ crowdRegular Joe- For the "off the couch" crew +2

From $10 Open Closing Soon

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2026 Doggie Dash

Sat, Jun 20 · Colorado Springs, CO Colorado Springs

Road 2026 Doggie Dash 5K

From $35 Open Closing Soon

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

Sat, Jun 20 · Centennial, CO Centennial

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

From $30 Open Closing Soon

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

Sat, Jun 20 · Windsor, CO Windsor

Road 1 Mile Fun Run5k Ruck5k run or walk +3

From $15 Open Closing Soon

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Unicorn 5k (North)

Sat, Jun 20 · Thornton, CO Thornton

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

From $16 Open Closing Soon

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Freedom Tour Classic

Sat, Jun 20 · Fort Collins, CO Fort Collins

5K Walk15 Mile25 Mile w/Jersey +3

From $25 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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Parker Parks and Recreation Dash Across the Dam Father’s Day 5K

Sat, Jun 20 · Parker, CO Parker

Road 5K

From $40 Open Closing Soon

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Sierra's 5K Run/Walk Race Against Meningitis

Sat, Jun 20 · Loveland, CO Loveland

Road 5K RunKids Fun Run (10 & Under)

From $10 Open Closing Soon

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Fatherhood 5k Family Run/Walk

Sat, Jun 20 · Colorado Springs, CO Colorado Springs

Road Family Pricing (Immediate Family)Youth 8-18 yrsAdult 5k

From $15 Open Closing Soon

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Juneteenth Fun Run 5K

Sun, Jun 21 · Denver, CO Denver

Road Kids 5K5K

From $25 Open Closing Soon

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

Sun, Jun 21 · Arvada, CO Arvada

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

From $8 Open Closing Soon

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Sunset Trail Running Festival

Sun, Jun 21 · Boulder, CO Boulder

Trail Kids 1K5K12K +1

From $15 Open Closing Soon

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Strawberry Shortcut

Sun, Jun 21 · Glenwood Springs, CO Glenwood Springs

Road Nancy Reinisch MileWilley Coyote 5K10K

From $25 Open Closing Soon

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The Red Schoolhouse Run

Tue, Jun 23 · Louisville, CO Louisville

Road The Red Schoolhouse Run

From $30 Open Closing Soon

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Stitch, Sip, & Support

Wed, Jun 24 · Aurora, CO Aurora

Stitch, Sip, & Support - Girls on the Run

From $46.23 Open Closing Soon 40 spots left

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BRR All-Comers Summer Track & Field Series #2

Thu, Jun 25 · Boulder, CO Boulder

Road Steeplechase (3000 + 2000)100m200m +11

From $20 Open Closing Soon 15 spots left

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Race in the Clouds - Alma Dirt Festival 2026

Thu, Jun 25 · Alma, CO Alma

Trail Highschool/Middle School Short Course (6.1miles)Trail 10KHighschool/Middle School Long Course (13 miles) +8

From $0 Open Closing Soon 10 spots left

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The Four Legged 5k

Fri, Jun 26 · Bailey, CO Bailey

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

From $10 Open Closing Soon

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SBT TRL

Sat, Jun 27 · Steamboat Springs, CO Steamboat Springs

Road 5k10k

From $35.75 Open Closing Soon

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Slacker Half Marathon-Relay-4-Mile Races

Sat, Jun 27 · Georgetown, CO Georgetown

Virtual 4-Mile4 Mile - Military VeteranVirtual 4 Mile +4

From $35 Open Closing Soon

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Loveland Lake to Lake Triathlon

Sat, Jun 27 · Loveland, CO Loveland

Triathlon OlympicAqua Bike - OlympicRelay - Sprint +5

From $110 Open Closing Soon

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The Sunlight Showdown

Sat, Jun 27 · Glenwood Springs, CO Glenwood Springs

Trail 5k Trail Run10k Trail Run1/2 Marathon Trail Run

From $35 Open Closing Soon

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Before The Fourth 5k

Sat, Jun 27 · Littleton, CO Littleton

Road Before The Fourth 5k

From $35 Open Closing Soon

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Denver Pride 5K

Sat, Jun 27 · Denver, CO Denver

Road Denver Pride 5K

From $40 Open Closing Soon

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Trail Town Races

Sat, Jun 27 · Ridgway, CO Ridgway

Road The 5-Mile Run/WalkThe 10-Mile Run

From $25 Open Closing Soon

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Pearl Street Mile

Sat, Jun 27 · Boulder, CO Boulder

Road Pearl Street MileKids 800m

From $15 Open Closing Soon

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Fitness Expo On Tap at the Colorado Tap House

Sat, Jun 27 · Arvada, CO Arvada

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

From $0 Open Closing Soon 20 spots left

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Cade’s Cause: Concussion & CTE Awareness Run/Walk

Sun, Jun 28 · Littleton, CO Littleton

Road Run/Walk AdultRun/Walk Kids (5-12)

From $10 Open Closing Soon

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Blue Sky Ascent & Round Trip (formerly the Mt. Evans Ascent)

Sun, Jun 28 · Idaho Springs, CO Idaho Springs

Road AscentRound-Trip

From $125 Open Closing Soon 75 spots left

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Tunnel to Towers National Golf Series Northern Colorado Golf Classic

Mon, Jun 29 · Windsor, CO Windsor

Sponsorship: 1 Tee Sign SponsorSponsorship: First Responder SponsorSponsorship: Hero Sponsor +11

From $40 Open Closing Soon 1 spots left

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Miles for Hope

Wed, Jul 1 · Canon City, CO Canon City

Open

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Durango Brewer's Trail Series

Thu, Jul 2 · Durango, CO Durango

Trail High Trestle Finale - Benefiting The HiveAnarchy Brewing - Benefiting ...Ska Brewing - Benefiting the La Plata County Humane Society +1

From $30 Open

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Avery Brewing Co. 4K on the 4th

Sat, Jul 4 · Boulder, CO Boulder

Road Avery Brewing Co. 4K on the 4th

From $40 Open Closing Soon

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

Sat, Jul 4 · Centennial, CO Centennial

Virtual Family Fun Run 1 MileVirtual Run Registration (5K/10K/13.1)5K Registration +3

From $30 Open

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Durango Main Avenue Mile

Sat, Jul 4 · Durango, CO Durango

Road Main Avenue Mile

From $15.81 Open

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6th Annual July 4th ROCK-IT RUN

Sat, Jul 4 · Castle Rock, CO Castle Rock

Road 5kHalf Marathon

From $43 Open Closing Soon

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Ourayce 10K Fun Run

Sat, Jul 4 · Ouray, CO Ouray

Road Ourayce 10K Fun Run

From $35 Open

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Burro Buster 5k

Sat, Jul 4 · Fairplay, CO Fairplay

Road 5k

From $35 Open

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Rendezvous Run for Independence

Sat, Jul 4 · Winter Park, CO Winter Park

Road Rendezvous Run for Independence 5K Run/Walk

From $40 Open

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Georgetown SUP-Athlon

Sat, Jul 4 · Georgetown, CO Georgetown

Triathlon Georgeotwn SUP-AthlonGeorgeotwn SUP-Athlon Relay

From $85 Open

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2026 Crested Butte Golden Retriever Registration July 4 Parade

Sat, Jul 4 · Crested Butte, CO Crested Butte

Open

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Greeley Freedom 5k Walk & Run

Sat, Jul 4 · Greeley, CO Greeley

Road 5k Run5k Walk

From $30 Open

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Pueblo's Firecracker 5k!

Sat, Jul 4 · Pueblo, CO Pueblo

Road Pueblo's Firecracker 5k!

From $19 Open

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Run For Your Life 5K

Sat, Jul 4 · Meeker, CO Meeker

Road Run For Your Life 5K

From $20 Open

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16th Annual Telluride Foundation Rundola: Run for Good

Sat, Jul 4 · Telluride, CO Telluride

Road 2026 Rundola: Run for Good

From $45 Open Closing Soon

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