Running Races in Colorado 2026 | Find & Register

Battle by the Brook

Sat, Sep 19 · Deckers, CO Deckers

Family RaceCompetitive Race

From $89 Open 75 spots left

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Gummball 5K

Sat, Sep 19 · Brighton, CO Brighton

Road Gummball 5K - In Honor of Fallen Deputy Heath Gumm

From $30 Open

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CEROX + IRON + IRON X

Sat, Sep 19 · Frederick, CO Frederick

Cerox Iron Teams of 2Cerox Iron X Teams of 2Cerox Iron X Individual +3

From $45 Open

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Autumn Run

Sat, Sep 19 · Buena Vista, CO Buena Vista

Road 5K10KHalf Marathon

From $30 Open 75 spots left

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2026 Montbello Alive! 5K

Sat, Sep 19 · Denver, CO Denver

Road Montbello Alive! 5K

From $25 Open

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Stride for Hope 5K and Kids Fun Run

Sat, Sep 19 · Delta, CO Delta

Road 1 Mile Kids Fun Run5K Run

From $15 Open

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Beulah Challenge and OverIt Series

Sat, Sep 19 · Beulah, CO Beulah

Road 5K - Age 17 & Under5K10K - Age 17 & Under +4

From $20 Open Closing Soon 1 spots left

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Miles 4 Madison 5K & 1K

Sat, Sep 19 · Littleton, CO Littleton

Virtual 1KVirtual 5K/1K5K

From $25 Open Closing Soon

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All-Out Fall Fest

Sat, Sep 19 · Westminster, CO Westminster

Virtual VIRTUAL 5K5K10K +3

From $20 Open Closing Soon

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Wellington STAR Foundation 5K 10K

Sat, Sep 19 · Wellington, CO Wellington

Road 5K RunStroller or Dog 5KKids 5K (ages 3-12) +3

From $10 Open

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Connection 5k

Sun, Sep 20 · CARBONDALE, CO CARBONDALE

Road Connection 5k

From $20 Open

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Fall Equinox

Sun, Sep 20 · Fort Collins, CO Fort Collins

Virtual Virtual 5 Mile5 MileHalf Marathon +1

From $50 Open

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Chile & Frijole Hot to Trot 5K & 10K

Sun, Sep 20 · Pueblo, CO Pueblo

Road 5K Run10K Run

From $35 Open Closing Soon

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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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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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Expo Park XC Runs

Sun, Sep 20 · Aurora, CO Aurora

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

From $22 Open Closing Soon

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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.Adult 5K RegistrationAlumni 5K Registration +4

From $10 Open

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Pikes Peak Marathon

Sun, Sep 20 · Manitou Springs, CO Manitou Springs

Road MarathonHalf Priced Award Entry

From $100 Open Closing Soon

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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

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2026 Skate for Chicken

Fri, Sep 25 · Colorado Springs, CO Colorado Springs

2026 Skate for Chicken

From $30 Open

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25th Annual Black Canyon Triathlon

Sat, Sep 26 · Montrose, CO Montrose

Triathlon Adult 5K Run onlyYouth 5K Run Only2-3 Person Family Team Relay +4

From $20 Open Closing Soon

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OUTLAST COLORADO SPRINGS

Sat, Sep 26 · Colorado Springs, CO Colorado Springs

Trail 6 Hour Challenge

From $90 Open Closing Soon

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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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Denver Rotary Club Cycling to Serve 2026

Sat, Sep 26 · Denver, CO Denver

Open

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HRCA Oktoberfest 5K

Sat, Sep 26 · Littleton, CO Littleton

Road 5K Run/Walk

From $40 Open Closing Soon

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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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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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Mesa County Search & Rescue 5K

Sat, Sep 26 · Fruita, CO Fruita

Road MCSAR 5K

From $25 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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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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NIGHT NATION RUN - DENVER

Sat, Sep 26 · Commerce City, CO Commerce City

Road PREMIUM REGISTRATIONVIP REGISTRATIONSTANDARD REGISTRATION

From $35 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 RegistrationVirtual Run Registration +3

From $30 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 Closing Soon

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

Sat, Sep 26 · 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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Pat Mahan Memorial Foundation 5K

Sun, Sep 27 · Wiggins, CO Wiggins

Road Pat Mahan Memorial 5K

From $40 Open

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Colorado Coyotes Youth XC Invitational

Sun, Sep 27 · Cenennial, CO Cenennial

Road Ages 8 & Under (born 2018+) - 2Km (1.24 miles)Ages 11&12 - (born 2014-2015) - 3Km (1.86 miles)Ages 9 &10 (born 2016-2017) - 3Km (1.86 miles) +1

From $25.99 Open

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Grand Valley Brew Runs

Sun, Sep 27 · Grand Junction, CO Grand Junction

Road Boo Run w/ WestCo BrewingUgly Sweater run w/Copper ClubMustache Run W/ Handlebar Tap House +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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14er Fest 14K & 5K

Sun, Sep 27 · Buena Vista, CO Buena Vista

Road 5K14K

From $35 Open

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Healthy Kids Running Series Fall 2026 - La Junta, CO

Sun, Sep 27 · La Junta, CO La Junta

Road PreK 2/3 Yr Old - 50 Yard DashPreK 4/5 Yr Old - 75 Yard DashKindergarten & 1st Grade - 1/4 Mile +4

From $5 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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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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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 (In-Person) +1

From $40 Open

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WWE ANNUAL RUN WITH THE WOLVES

Sun, Sep 27 · Arvada, CO Arvada

Road 1k (untimed)Sleep-In for the Wolf Pack (and run when it works for you)5k

From $25 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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Flyin' Lion 5K

Sun, Sep 27 · Littleton, CO Littleton

Virtual Elementary School Student 5K Registration - Grade 5 and younger onlyAlumni 5K RegistrationI'm Snoozing while the Lions are Cruising +2

From $15 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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Emerald Mountain Trail Run

Sat, Oct 3 · Steamboat Springs, CO Steamboat Springs

Road 4 Mile12k

From $25.75 Open Closing Soon

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I Can 5k

Sat, Oct 3 · Thornton, CO Thornton

Open

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Running Races in Colorado — 2026

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