Running Races in Colorado — 2026

There are 349 running races in Colorado in 2026 across 96 cities. The next upcoming race is the One Is Too Many: Veteran Suicide Awareness 5k and Kids Run in Greeley on July 19. Popular distances include 5K races, half marathons, trail runs.

Chile & Frijole Hot to Trot 5K & 10K

Sun, Sep 20 · Pueblo, CO Pueblo

Road 5K Run10K Run

From $35 Open

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Fall Equinox

Sun, Sep 20 · Fort Collins, CO Fort Collins

Virtual 5 MileVirtual 5 MileVirtual Half Marathon +1

From $50 Open Closing Soon

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Expo Park XC Runs

Sun, Sep 20 · Aurora, CO Aurora

Road 2k, 8&u3k, 12&u3k, 10&u +2

From $22 Open

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7th ANNUAL PAUL'S MYSTERY SHIP WALK TO END ALS

Sun, Sep 20 · Castle Rock, CO Castle Rock

7th ANNUAL PAUL'S MYSTERY SHIP WALK TO END ALS

From $45 Open

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20th Annual Golden Gallop

Sun, Sep 20 · Golden, CO Golden

Road 5K10K20K Challenge - ONLY 10K completed on race day, remaining 10K done virtually +2

From $25 Open

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Pikes Peak Marathon

Sun, Sep 20 · Manitou Springs, CO Manitou Springs

Road Half Priced Award EntryMarathon

From $100 Open

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Farmers 5000

Sun, Sep 20 · Wheat Ridge, CO Wheat Ridge

Virtual Elementary School Student (K- grade 5) 5K Registration. Youth large t shirt included.Alumni 5K RegistrationHigh School Student and Staff 5K Registration. T-shirt included in registration. +4

From $10 Open

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CG Adventure Club - Elevation Everest

Wed, Sep 23 · Winter Park, CO Winter Park

Basic Experience PackageAll-In Adventure PackageStarter Adventure Package

From $150 Open

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Red Feather Trail Jamboree

Fri, Sep 25 · Red Feather Lakes, CO Red Feather Lakes

Trail Red Feather Trail Jamboree Half MarathonRed Feather Trail Jamboree 50kmRed Feather Trail Jamboree 50 Mile +1

From $90 Open Closing Soon

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West Line Winder

Sat, Sep 26 · Buena Vista, CO Buena Vista

Trail 50k30k

From $105 Open

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HRCA Oktoberfest 5K

Sat, Sep 26 · Littleton, CO Littleton

Road 5K Run/Walk

From $40 Open

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OUTLAST COLORADO SPRINGS

Sat, Sep 26 · Colorado Springs, CO Colorado Springs

Trail 6 Hour Challenge

From $90 Open

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Denver Rotary Club Cycling to Serve 2026

Sat, Sep 26 · Denver, CO Denver

Open

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

Sat, Sep 26 · Centennial, CO Centennial

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

From $30 Open

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Estes Epic

Sat, Sep 26 · Estes Park, CO Estes Park

Trail Heavy Half Marathon50k Bike50k Run +1

From $80 Open Closing Soon

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NIGHT NATION RUN - DENVER

Sat, Sep 26 · Commerce City, CO Commerce City

Road STANDARD REGISTRATIONPREMIUM REGISTRATIONVIP REGISTRATION

From $35 Open

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25th Annual Black Canyon Triathlon

Sat, Sep 26 · Montrose, CO Montrose

Triathlon Youth 5K Run OnlyAdult 5K Run onlyYouth Individual Triathlon Entry +4

From $20 Open

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Run For Your Flapjacks 5K

Sat, Sep 26 · Oak Creek, CO Oak Creek

Road Run For Your Flapjacks 5K

From $20 Open

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Parker Parks and Recreation So Long to Summer 5K/10K

Sat, Sep 26 · Parker, CO Parker

Road 5K10K

From $40 Open

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Sangre de Cristo Trail Festival

Sat, Sep 26 · Westcliffe, CO Westcliffe

Trail 8-Mile27k50-Mile +3

From $40 Open

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Mountain Marmot Trail Run presented by Durango Running Company

Sat, Sep 26 · Durango, CO Durango

Trail Mountain Marmot Trail Run

From $85 Open

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

Sat, Sep 26 · Centennial, CO Centennial

Virtual Family 1 Mile Fun Run5K/10K/13.1 Eco-Registration (No Shirt)5K Registration +3

From $30 Open

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Runway 5K - Run for the Angels

Sat, Sep 26 · Broomfield, CO Broomfield

Virtual Virtual Runway 5K - Run, Walk, Fly | September 26 - October 4In-Person Runway 5K - Run or Walk - September 26

From $25 Open

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Mesa County Search & Rescue 5K

Sat, Sep 26 · Fruita, CO Fruita

Road MCSAR 5K

From $25 Open

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Running for Children's Rights to Both Parents - 9 of 50 Half Marathons in 50 States - Colorado

Sun, Sep 27 · Boulder, CO Boulder

Virtual 5K (Virtual)10K (Virtual)1/2 Marathon (Virtual) +1

From $40 Open

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Greenland Open Space Pack Burro Race presented by Double Rainbow Ranch (8 Mile and 3 Mile)

Sun, Sep 27 · Larkspur, CO Larkspur

Trail Greenland Open Space 3 MileGreenland Open Space 8 Mile

From $60 Open 85 spots left

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Flyin' Lion 5K

Sun, Sep 27 · Littleton, CO Littleton

Virtual Alumni 5K RegistrationElementary School Student 5K Registration - Grade 5 and younger onlyAdult 5K Registration +2

From $15 Open

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Grand Valley Brew Runs

Sun, Sep 27 · Grand Junction, CO Grand Junction

Road Oktoberfest 5k fun runMustache 5k fun runBoo Run w/ WestCo Brewing +5

From $35 Open

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Sawatch Ascent

Sun, Sep 27 · Nathrop, CO Nathrop

Ultra 50k

From $129 Open

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Pat Mahan Memorial Foundation 5K

Sun, Sep 27 · Wiggins, CO Wiggins

Road Pat Mahan Memorial 5K

From $40 Open

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Joy & Justice 5k

Sun, Sep 27 · Timnath, CO Timnath

Virtual Kids 1 mile Fun Run (12 & Under)Joy & Justice 5k WalkVirtual 5k +1

From $15 Open

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Colorado Coyotes Youth XC Invitational

Sun, Sep 27 · Cenennial, CO Cenennial

Road Ages 8 & Under (born 2017+) - 2Km (1.24 miles)Ages 9 &10 (born 2015-2014) - 3Km (1.86 miles)Ages 11&12 - (born 2013-2014) - 3Km (1.86 miles) +1

From $30 Open

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RMRR Fall Marathon Training Series #3

Sun, Sep 27 · Thornton, CO Thornton

Road RMRR Fall Marathon Training Series #3 - 10 MileRMRR Fall Marathon Training Series #3 - 20 Mile

From $20 Open

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14er Fest 14K & 5K

Sun, Sep 27 · Buena Vista, CO Buena Vista

Road 5K14K

From $35 Open

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Water For People World Water Classic

Fri, Oct 2 · Anywhere, CO Anywhere

Virtual Virtual 6kVirtual 60k BikeGet Creative

From $35 Open

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Spooky Sprint - Denver

Sat, Oct 3 · Littleton, CO Littleton

Virtual 1 Mile5K10K +4

From $20 Open 5 spots left

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FAMpoint5k

Sat, Oct 3 · Grand Junction, CO Grand Junction

Road FAMpoint5k - The Race for the Rest of Us

From $20 Open

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Homecoming 5K - Colorado State University

Sat, Oct 3 · Fort Collins, CO Fort Collins

Virtual 5K CSU StudentVirtual 5KHomecoming 5K +2

From $25 Open

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Lafayette Music Fest -5K - 10K

Sat, Oct 3 · Lafayette, CO Lafayette

Road 5K10K

From $40 Open

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Splashland Triathlon

Sat, Oct 3 · Alamosa, CO Alamosa

Triathlon Individual Triathlon Entry3 Person Team Triathlon Entry2 Person Team Triathlon Entry

From $70 Open

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PRA Miner Gold Rush

Sat, Oct 3 · Broomfield, CO Broomfield

Road 1 Mile Fun Run + Fall Festival5K Run + Fall FestivalFall Festival Only

From $15 Open

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Colorado Springs Marathon, Half, 5K, and Kids K

Sat, Oct 3 · Colorado Springs, CO Colorado Springs

Virtual Kids KVirtual Kids K2027 VIRTUAL 5k +16

From $0 Open 20 spots left

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OUTLAST DENVER

Sat, Oct 3 · Littleton, CO Littleton

Trail 6 Hour Challenge

From $90 Open

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I Can 5k

Sat, Oct 3 · Thornton, CO Thornton

Open

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HRCA Wildcat Mountain Trail Races

Sat, Oct 3 · Littleton, CO Littleton

Trail 10K10MKid's Race

From $10 Open Closing Soon

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Rim to Rim Royal Gorge Races: 5K Road Run, Trail 8 Mile, Trail Half Marathon

Sat, Oct 3 · Canon City, CO Canon City

Virtual VIRTUAL 5k Run/Walk5K Road Run8 Mile Trail Run +3

From $40 Open Closing Soon

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Emerald Mountain Trail Run

Sat, Oct 3 · Steamboat Springs, CO Steamboat Springs

Road 4 Mile12k

From $25.75 Open

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Big Waves Family 5K run/walk

Sat, Oct 3 · Westminster, CO Westminster

Road Big Waves Family 5k

From $45 Open

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Kids' Fall Series - Where Kids Run Free!

Sun, Oct 4 · Colorado Springs, CO Colorado Springs

Open

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Rubey Rescue Run

Sun, Oct 4 · Aspen, CO Aspen

Trail 1 Mile3.5M Trail Run

From $60.38 Open

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