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.

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 Closing Soon

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RMRR October 5k/8mi

Sun, Oct 4 · Aurora, CO Aurora

Road 5k8mi

From $10 Open

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OTILLO Swimrun Colorado

Sun, Oct 4 · Fort Collins, CO Fort Collins

Triathlon World Series SoloWorld Series TeamSprint Team +3

From $70 Open

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Your Story Isn't Over 5k/10k/Kids 1-Mile

Wed, Oct 7 · Littleton, CO Littleton

Virtual Your Story Isn't Over Kids RunYour Story Isn't Over 5kYour Story Isn't Over Virtual 5k +1

From $20 Open

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Kipling Villas 5K - 2026

Sat, Oct 10 · Littleton, CO Littleton

Road 5K Run

From $15 Open

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Suffer Better 10th Annual Fall Trail Runs

Sat, Oct 10 · Pine, CO Pine

Trail Suffer Better 25KSuffer Better 25K - FishSlappers DivisionSuffer Better 50K +1

From $25 Open 30 spots left

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Manitou 5K

Sat, Oct 10 · Manitou Springs, CO Manitou Springs

Road Manitou 5K 18 and underManitou 5K

From $25 Open

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Breckenridge RunFest

Sat, Oct 10 · Breckenridge, CO Breckenridge

Road Kids & Family Mile5K10K +2

From $25 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 Registration +3

From $30 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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Footsteps for Families 5k Fun Run & Concert

Sat, Oct 10 · Windsor, CO Windsor

Virtual Footsteps for Families 5k Fun Run and ConcertFootsteps for Families 5k Fun Run-VIRTUAL EVENTFootsteps for Families 5k Fun Run- 12 and Under Youth Registration

From $20 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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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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EDT XC Showdown

Sun, Oct 11 · Aurora, CO Aurora

Road 8&U Boys/Girls 2kCommunity/Coaches 3K11/12 Boys/Girls 3k +2

From $25 Open

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The Moony Pride 5k

Sun, Oct 11 · Fort Collins, CO Fort Collins

Open

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Westy Half & 5k

Sun, Oct 11 · Westminster, CO Westminster

Road 5kHalf Marathon

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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Indian Creek Trail Runs

Sat, Oct 17 · Sedalia, CO Sedalia

Trail 5-Mile15-Mile55k +1

From $30 Open Closing Soon

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The Great Pumpkin Haul

Sat, Oct 17 · Fruita, CO Fruita

Road Solo hauler entryCharity entry4 person team- save $5 each! +2

From $0 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 Closing Soon

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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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Living Water 5K and Family Fun Run

Sat, Oct 17 · Denver, CO Denver

Road 5K and Family Fun Run

From $30 Open

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The Palmer Lake .5K (Yes "Point" 5)

Sun, Oct 18 · Palmer Lake, CO Palmer Lake

Road .5k Child (Under 12).5k Dog Participant.5 (yes point 5) K

From $15 Open

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DU Crimson Classic 5K Run/1.5 Mile Walk

Wed, Oct 21 · Denver, CO Denver

Road Volunteer One Hour - Day of Crimson Classic

From $0 Open

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YMCA Creepy Crawl 5K

Sat, Oct 24 · Palmer Lake, CO Palmer Lake

Road Creepy Crawl 5K

From $40 Open

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Mancos Cowboy Half Marathon, 5K, and Fun Run

Sat, Oct 24 · Mancos, CO Mancos

Road Mancos 5KMancos Cowboy Half Marathon

From $25 Open

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Apex Foundation Trick or Trot 5K & Halloween Hunt Powered by REP Fitness

Sat, Oct 24 · Arvada, CO Arvada

Virtual Kids' 1-mile Halloween Hunt powered by REP FitnessTrick or Trot VIRTUAL 5K powered by REP FitnessTrick or Trot 5K powered by REP Fitness

From $10 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 - Child +3

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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Spooky Sprint - Colorado Springs

Sat, Oct 31 · Colorado Springs, CO Colorado Springs

Virtual 5k10K1 Mile +4

From $17 Open Closing Soon 5 spots left

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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 RegistrationVirtual Run Registration +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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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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Foundry Halloween 5k

Sat, Oct 31 · Steamboat Springs, CO Steamboat Springs

Road Foundry 5K

From $25.75 Open

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Halloween Fun Run 5k & 1mile - Zombie Theme

Sat, Oct 31 · Idaho Springs, CO Idaho Springs

Road 1 Mile Fun Run5k Fun Run

From $20 Open

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All-Out Kooky-Spooky

Sun, Nov 1 · Golden, CO Golden

Virtual 5KVIRTUAL 5K10K +3

From $20 Open

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Feet for Justice Run

Sun, Nov 1 · Denver, CO Denver

Road 5KVirtual Runner10K +1

From $10 Open

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RMRR November 5k/15k

Sun, Nov 1 · Denver, CO Denver

Road 5k15k

From $10 Open

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Alamosa Veterans Memorial Park Race

Sat, Nov 7 · Alamosa, CO Alamosa

Road Alamosa Veterans Memorial Park 10kAlamosa Veterans Memorial Park 5k

From $20 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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Colorado 24 Hour Run

Sat, Nov 7 · Fort Collins, CO Fort Collins

Road 24 Hour6 Hour24 Hour Relay +3

From $90 Open Closing Soon

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Turkey Trails- Denver

Sat, Nov 7 · Littleton, CO Littleton

Virtual 1 Mile5K10K +4

From $17 Open 5 spots left

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City Park Classic (5k/10k & 1 Mile Walk of Hope for Pancreatic Cancer Research)

Sat, Nov 7 · Denver, CO Denver

Road 1 Mile (ish) Walk of Hope (untimed)5k Run/Walk10k Run

From $16 Open Closing Soon

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Bell Ringer 2 Miler

Sat, Nov 7 · Loveland, CO Loveland

Virtual Virtual 2 MilerBell Ringer 2 MilerRuck Division

From $20 Open

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Turkey Trails - Colorado Springs

Sun, Nov 8 · Colorado Springs, CO Colorado Springs

Virtual 1 Mile5k10k +4

From $17 Open 5 spots left

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Colorado Springs Veterans Day 5k

Sun, Nov 8 · Colorado Springs, CO Colorado Springs

Road Colorado Springs Veterans Day 5KKids 15 yrs and under 5k

From $15 Open

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Denver Veterans Day Run

Sat, Nov 14 · Denver, CO Denver

Road 5K Run/Walk10K Rippetoe Rucksack Challenge10K Run/Walk

From $45 Open

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Colorado State Youth Cross Country Championships

Sat, Nov 14 · Aurora, CO Aurora

Road Girls 8 & Under (Born 2018+) - 2KM (1.24 Miles)Boys 8 & Under (Born 2018+) - 2KM (1.24 Miles)Girls 9 & 10 (Born 2016-2017) - 3K (1.86 Miles) +5

From $25.99 Open

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Veterans Day Freedom Run 5K/10K/13.1 DENVER/AURORA

Sat, Nov 14 · Centennial, CO Centennial

Virtual Family Fun Run 1 Mile5K/10K/13.1 Eco-Registration (No Shirt)5K Registration +3

From $30 Open

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Run for Mental Health 5K/10K/13.1 DENVER/AURORA

Sat, Nov 14 · Centennial, CO Centennial

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

From $30 Open

Register →