Running Races in Colorado — 2026

There are 422 running races in Colorado in 2026 across 109 cities. The next upcoming race is the Middle School San Juan Basin League Meet in Ridgway on April 24. Popular distances include 5K races, trail runs, half marathons.

The Sunlight Showdown

Sat, Jun 27 · Glenwood Springs, CO Glenwood Springs

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

From $35 Open

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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 75 spots left

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Tunnel to Towers National Golf Series Northern Colorado Golf Classic

Mon, Jun 29 · Windsor, CO Windsor

Sponsorship: Patriot SponsorLunch OnlyGolf Package- Golf w/Cart & Lunch +11

From $40 Open 1 spots left

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Denver Rotary Club Cycling to Serve 2026

Wed, Jul 1 · Denver, CO Denver

Open

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Miles for Hope

Wed, Jul 1 · Canon City, CO Canon City

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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Greeley Freedom 5k Walk & Run

Sat, Jul 4 · Greeley, CO Greeley

Road 5k Walk5k Run

From $30 Open Closing Soon

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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

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Red, White, and WARRIOR 5K

Sat, Jul 4 · Grand Junction, CO Grand Junction

Road Red, White, and WARRIOR 5KLittle Sparkler Sprint

From $10 Open

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FireKracker 5k

Sat, Jul 4 · Fort Collins, CO Fort Collins

Road Kids 1-MileFireKracker 5kElite 5k

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

Sat, Jul 4 · Centennial, CO Centennial

Virtual Family 1 Mile Fun Run5K RegistrationVirtual Run Registration +3

From $30 Open

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40th Annual Boogie's Buddy Race

Sat, Jul 4 · Aspen, CO Aspen

Road 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

Road 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

Virtual Family Fun Run 1 Mile5K Registration5K/10K/13.1 Eco-Registration (No Shirt) +3

From $30 Open

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Red Feather Lakes 3.6 Mile Fun Run

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

Road Red Feather Lakes 3.6 Mile Fun Run

From $40 Open

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Sheep Creek Triathlon

Sat, Jul 4 · Antonito, CO Antonito

Triathlon TriathlonShirt Purchase Only

From $20 Open

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Palmer Lake July 4th Fun Run

Sat, Jul 4 · Palmer Lake, CO Palmer Lake

Virtual July 4 Fun Run - Middle School and High School StudentJuly 4 Fun Run - AdultJuly 4 Fun Run - VIRTUAL RACE Elementary Student and Younger +3

From $20 Open Closing Soon

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Let Freedom Run 5k/10k - Louisville

Sat, Jul 4 · Louisville, CO Louisville

Road 5k10k

From $30 Open

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Ourayce 10K Fun Run

Sat, Jul 4 · Ouray, CO Ouray

Road Ourayce 10K Fun Run

From $25 Open

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Loveland Liberty 5K

Sat, Jul 4 · Loveland, CO Loveland

Virtual 5KVirtual 5K

From $35 Open Closing Soon

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Let Freedom Run 5k - LONGMONT

Sat, Jul 4 · Longmont, CO Longmont

Road 5k Run/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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Independence Day Freedom 5K

Sat, Jul 4 · Buena Vista, CO Buena Vista

Road 3K5K

From $25 Open Closing Soon

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Hahns Peak Vertical Trail Race

Sun, Jul 5 · Clark, CO Clark

Road 8 Mile

From $40 Open

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BRR All-Comers Summer Track & Field Series #3

Thu, Jul 9 · Boulder, CO Boulder

Road 5000m100M200M +10

From $20 Open 15 spots left

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Silverheels Trail Runs

Fri, Jul 10 · Como, CO Como

Trail 10-Mile19-Mile60k +3

From $50 Open

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All-Out Dog Days

Sat, Jul 11 · Westminster, CO Westminster

Virtual VIRTUAL 5K5KVIRTUAL 10K +3

From $25 Open

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Grin & Bear It

Sat, Jul 11 · Crested Butte, CO Crested Butte

Road 15 km Out and BackMountain Bike25 km Loop

From $75 Open Closing Soon 75 spots left

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Pagosa Duathlon

Sat, Jul 11 · Pagosa Springs, CO Pagosa Springs

Triathlon Dusty KidsDirty SprintDirty Du

From $15 Open

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Cookie Chase

Sat, Jul 11 · Denver, CO Denver

Road 5KVirtual 5K

From $30 Open

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Heatwave Half Marathon - Denver

Sat, Jul 11 · Denver, CO Denver

Virtual 1 Mile5 K10 K +5

From $17 Open 5 spots left

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Heatwave Half Marathon - Colorado Springs

Sun, Jul 12 · Colorado Springs, CO Colorado Springs

Virtual 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

Road 2mi

From $10 Open

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Rocky Mountain State Games - Swim / Run

Sun, Jul 12 · Colorado Springs, CO Colorado Springs

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

From $25 Open

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PNAAF 5K Wellness Challenge

Thu, Jul 16 · Colorado Springs, CO Colorado Springs

Virtual Virtual 5KPNAAF 5K Wellness Challenge

From $35 Open

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High Lonesome 100

Fri, Jul 17 · Nathrop, CO Nathrop

Ultra 100 Miler

From $465 Open

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Heritage Eagles 5K

Sat, Jul 18 · Littleton, CO Littleton

Road Heritage Eagles 5K

From $25 Open Closing Soon

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

Sat, Jul 18 · Alma, CO Alma

Road 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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Audi Power of Four Trail Run

Sat, Jul 18 · Aspen, CO Aspen

Trail 10K Run25K Run50K Run

From $105 Open Closing Soon 75 spots left

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2026 OCA Colorado 5K Panda Run

Sat, Jul 18 · Denver, CO Denver

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

From $35 Open

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Expedition Maroon Bells

Sat, Jul 18 · Aspen, CO Aspen

Freedom Expedition DepositFreedom Expedition Leadership TeamFreedom Expedition

From $0 Open 5 spots left

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Spring Creek Memorial Trail Run

Sat, Jul 18 · Steamboat Springs, CO Steamboat Springs

Road 5k9.5 Mile

From $25.75 Open 100 spots left

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

Sat, Jul 18 · Castle Rock, CO Castle Rock

Road 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

Road 1 Mile5k run or walk

From $15 Open Closing Soon

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Barr Trail Mountain Race

Sun, Jul 19 · Manitou Springs, CO Manitou Springs

Road BTMRAid Station Challenge Sponsor

From $75 Open Closing Soon 16 spots left

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Clear for Takeoff Virtual 5K

Mon, Jul 20 · Englewood, CO Englewood

Virtual Clear for Takeoff Virtual 5K

From $35 Open

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14er Challenge

Thu, Jul 23 · Buena Vista, CO Buena Vista

14er Challenge 2026

From $249 Open Closing Soon 40 spots left

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BRR All-Comers Summer Track & Field Series #4

Thu, Jul 23 · Boulder, CO Boulder

Road 100M200M400M +10

From $20 Open 15 spots left

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Never Summer 100km & 60km

Fri, Jul 24 · Walden, CO Walden

Ultra Never Summer 60kmNever Summer 100kmThe Double (60km & 100km)

From $175 Open 20 spots left

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