Running Races in Colorado — 2026

There are 435 running races in Colorado in 2026 across 107 cities. The next upcoming race is the Dash for Detection: Oral Cancer Awareness 5K in Denver on April 11. Popular distances include 5K races, trail runs, half marathons.

Fall Equinox

Sun, Sep 20 · Fort Collins, CO Fort Collins

Virtual Virtual 5 Mile5 MileVirtual Half Marathon +1

From $50 Open

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CG Adventure Club - Elevation Everest

Wed, Sep 23 · Winter Park, CO Winter Park

All-In Adventure PackageBasic Experience 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 50 MileRed Feather Trail Jamboree 50km +1

From $90 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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25th Annual Black Canyon Triathlon

Sat, Sep 26 · Montrose, CO Montrose

Triathlon 2-3 Person Family Team RelayAdult Individual Triathlon Entry2-3 Person Youth Team Triathlon Entry +2

From $20 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 29 - October 4In-Person Runway 5K - Run or Walk - September 26

From $25 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

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West Line Winder

Sat, Sep 26 · Buena Vista, CO Buena Vista

Trail 50k30k

From $105 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 MileVirtual Run Registration (5K/10K/13.1)5K/10K/13.1 Eco-Registration (No Shirt) +3

From $30 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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NIGHT NATION RUN - DENVER

Sat, Sep 26 · Commerce City, CO Commerce City

Road PREMIUM REGISTRATIONVIP REGISTRATIONSTANDARD REGISTRATION

From $35 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 100 spots left

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

Sat, Sep 26 · Centennial, CO Centennial

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

From $30 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 11&12 - (born 2013-2014) - 3Km (1.86 miles)Ages 9 &10 (born 2015-2014) - 3Km (1.86 miles) +1

From $30 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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Sawatch Ascent

Sun, Sep 27 · Nathrop, CO Nathrop

Ultra 50k

From $129 Open

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Spooky Sprint - Denver

Sat, Oct 3 · Denver, CO Denver

Virtual 1 Mile5K10K +4

From $20 Open 5 spots left

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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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I Can 5k

Sat, Oct 3 · Thornton, CO Thornton

Open

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Homecoming 5K - Colorado State University

Sat, Oct 3 · Fort Collins, CO Fort Collins

Virtual 5K CSU StudentHomecoming 5K5K CSU Alumni +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 2 Person Team Triathlon Entry3 Person Team Triathlon EntryIndividual Triathlon Entry

From $70 Open

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HRCA Wildcat Mountain Trail Races

Sat, Oct 3 · Littleton, CO Littleton

Trail 10M10KKid's Race

From $10 Open

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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

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

Sat, Oct 3 · Colorado Springs, CO Colorado Springs

Virtual Virtual Kids KKids K2027 VIRTUAL 5k +16

From $0 Open 20 spots left

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OTILLO Swimrun Colorado

Sun, Oct 4 · Fort Collins, CO Fort Collins

Triathlon Sprint TeamExperience SoloWorld Series Team +3

From $70 Open

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Windsor Marathon, Half Marathon, 10k, 5k & 1 Mile Run

Sun, Oct 4 · Windsor, CO Windsor

Road 1 Mile Fit & Fun Run5K10K +2

From $20 Open

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RMRR October Trophy Series

Sun, Oct 4 · Aurora, CO Aurora

Road 5k8mi

From $10 Open

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Rubey Rescue Run

Sun, Oct 4 · Aspen, CO Aspen

Trail 3.1M Trail Run

From $60.38 Open

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Coffee Lovers Run 5K/10K/13.1 DENVER/AURORA

Sat, Oct 10 · Centennial, CO Centennial

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

From $30 Open

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The Long View Marathon

Sat, Oct 10 · Fort Collins, CO Fort Collins

Road The Long View 5kThe Long View Half MarathonThe Long View Marathon

From $35 Open

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Dialysis Dash 5K

Sat, Oct 10 · Grand Junction, CO Grand Junction

Road 5K Dialysis Dash Run

From $20 Open

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

Sat, Oct 10 · Centennial, CO Centennial

Virtual Family 1 Mile Fun Run5K RegistrationVirtual Run Registration +3

From $30 Open

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Durango Marathon

Sun, Oct 11 · Durango, CO Durango

Road Durango Half MarathonDurango MarathonDurango Marathon Weekend 5k

From $20 Open

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Westy Half & 5k

Sun, Oct 11 · Westminster, CO Westminster

Road 5kHalf Marathon

From $30 Open

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Indian Creek Trail Runs

Sat, Oct 17 · Sedalia, CO Sedalia

Trail 5-Mile15-Mile55k +1

From $30 Open

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Blue Sky Trail Marathon & Half Marathon

Sat, Oct 17 · Fort Collins, CO Fort Collins

Trail Blue Sky Trail Half MarathonBlue Sky Trail Marathon

From $90 Open

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The Great Trailhead Foot Race 5 & 10 Miler

Sat, Oct 17 · Lakewood, CO Lakewood

Road 5 Miler10 Mile

From $55 Open

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Race to Cure Sarcoma Denver

Sat, Oct 24 · Denver, CO Denver

Virtual 5K Run or 1 Mile Walk (Untimed) - Adult5K Run or 1 Mile Walk (Untimed) - Child (Ages 6-12)Virtual - Adult +3

From $10 Open

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Apex Foundation Trick or Trot 5K & Halloween Hunt

Sat, Oct 24 · Arvada, CO Arvada

Virtual Kids' 1-mile Halloween HuntTrick or Trot VIRTUAL 5KTrick or Trot 5K

From $10 Open

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Ghosts and Goblins 5K/10K

Sun, Oct 25 · Denver, CO Denver

Road Virtual Race5K10K

From $30 Open

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Foundry Halloween 5k

Sat, Oct 31 · Steamboat Springs, CO Steamboat Springs

Road Foundry 5K

From $25.75 Open

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PB&J Fuel Run 5K/10K/13.1 DENVER/AURORA

Sat, Oct 31 · Centennial, CO Centennial

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

From $30 Open

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I Ain't Scared (of 5k)

Sat, Oct 31 · Thornton, CO Thornton

Road 5k

From $29 Open

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Halloween Trick or Trot Run 5K/10K/13.1 DENVER/AURORA

Sat, Oct 31 · Centennial, CO Centennial

Virtual Family 1 Mile Fun Run5K Registration5K/10K/13.1 Eco-Registration (No Shirt) +3

From $30 Open

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Spooky Sprint - Colorado Springs

Sat, Oct 31 · Colorado Springs, CO Colorado Springs

Virtual 5k10KVolunteer then Run +4

From $17 Open 5 spots left

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RMRR November Trophy Series

Sun, Nov 1 · Denver, CO Denver

Road 5k15k

From $10 Open

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All-Out Kooky-Spooky

Sun, Nov 1 · Golden, CO Golden

Virtual 5KVIRTUAL 5K10K +3

From $25 Open

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HRCA Backcountry Wilderness Half Marathon

Sat, Nov 7 · Lone Tree, CO Lone Tree

Trail Half Marathon

From $65 Open

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Bell Ringer 2 Miler

Sat, Nov 7 · Loveland, CO Loveland

Virtual Ruck DivisionBell Ringer 2 MilerVirtual 2 Miler

From $20 Open

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