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.

Run the Ranch

Fri, Apr 10 · Loveland, CO Loveland

Trail 5k10k (heavy)Virtual 4HR/6HR12HR +6

From $45 Open Closing Soon

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RMRR Spring Marathon Training Series #2

Sat, Apr 11 · Thornton, CO Thornton

Road MTS#2 - 10 MileMTS#2 - 20 Mile

From $20 Open Closing Soon

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Rockin on the River 5K

Sat, Apr 11 · Littleton, CO Littleton

Road 5K

From $26 Open Closing Soon

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CRMAC Uplift Her - 5K Run/Walk

Sat, Apr 11 · Fort Collins, CO Fort Collins

Open Closing Soon

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Run Through The Decades 6K/7K/8K/Half - Colorado Springs

Sat, Apr 11 · Colorado Springs, CO Colorado Springs

Virtual Virtual 6K6K7K +5

From $35 Open Closing Soon

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Hop Into Spring 5K - Denver

Sun, Apr 12 · Denver, CO Denver

Virtual Virtual 5K5K5K-No Shirt

From $30 Open Closing Soon

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Platte River Half-Marathon, Relay & 5k

Sun, Apr 12 · Littleton, CO Littleton

Road 2027 5k5k2027 Half Marathon Relay +3

From $35 Open Closing Soon

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Spring Fling Prairie Dog Half, 10k, & 5k

Sun, Apr 12 · Arvada, CO Arvada

Road 5k10kHalf Marathon

From $25 Open Closing Soon

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Healthy Kids Running Series Spring 2026 - Aurora, CO

Sun, Apr 12 · Aurora, CO Aurora

Road Single Day Walk Up Week 5PreK 2/3 Yr Old - 50 Yard DashPreK 4/5 Yr Old - 75 Yard Dash +9

From $15 Open Closing Soon

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NoCo Urban Ultra & Relay

Sun, Apr 12 · Bellvue, CO Bellvue

Ultra 50 Mile (Individual)50 Mile (Relay)100 Mile (Relay) +1

From $100 Open Closing Soon

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Healthy Kids Running Series Spring 2026 - Denver, CO

Sun, Apr 12 · Denver, CO Denver

Road Challenger Division - 75 Yard DashSingle Day Walk Up Week 1Single Day Walk Up Week 2 +9

From $15 Open Closing Soon

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RMRR April Trophy Series

Sun, Apr 12 · Denver, CO Denver

Road RMRR April Trophy Series Race

From $10 Open Closing Soon

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Donut Dash

Sun, Apr 12 · Denver, CO Denver

Road Virtual 5K5K

From $30 Open Closing Soon

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Boulder Track Series Meet 1

Sun, Apr 12 · Longmont, CO Longmont

Road 2-Mile - 20 years & older2-Mile - 13 to 19 years800m - 12 & under +14

From $10 Open

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Healthy Kids Running Series Spring 2026 - Fort Collins, CO

Sun, Apr 12 · Fort Collins, CO Fort Collins

Road Single Day Walk Up Week 4PreK 2/3 Yr Old - 50 Yard DashPreK 4/5 Yr Old - 75 Yard Dash +9

From $15 Open Closing Soon

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Great Western Trail Race

Sat, Apr 18 · Severance, CO Severance

Road Kids Fun Run5k10k +1

From $15 Open Closing Soon

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Woody's Tortoise And Hare

Sat, Apr 18 · Fountain, CO Fountain

Road Woody's Tortoise and Hare 5K

From $20 Open Closing Soon

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4th Street Flannel Fest - Winter Edition

Sat, Apr 18 · Loveland, CO Loveland

Designated Driver - General AdmissionVIP - WineVIP - Beer +2

From $35 Open Closing Soon 10 spots left

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The Rocky Run by Eldorado PK-8 PTO

Sat, Apr 18 · Superior, CO Superior

Road 5K Youth Entry (17 & Under)Family 5K 4-Pack (Expires on April 11th)5K Adult Entry (18+) +2

From $25 Open Closing Soon

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All-Out Beat the Heat

Sat, Apr 18 · Westminster, CO Westminster

Virtual VIRTUAL 5K5KVIRTUAL 10K +3

From $25 Open Closing Soon

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Earth Day 5K

Sat, Apr 18 · Durango, CO Durango

Road Earth Day 5K

From $30 Open Closing Soon

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Donot Stop Half Marathon (5k/10k) - Colorado Springs

Sat, Apr 18 · Colorado Springs, CO Colorado Springs

Virtual 1 Mile5K10K +5

From $0 Open Closing Soon 5 spots left

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DoNot Stop Half Marathon (5k/10k) - Denver

Sun, Apr 19 · Westminster, CO Westminster

Virtual 1 Mile5K10K +4

From $17 Open Closing Soon 5 spots left

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2026 Fairmount Fit Fest

Sun, Apr 19 · Golden, CO Golden

Virtual All Access Pass (includes 5k Run or Walk, Ninja course & Fun Run)Virtual 5k Run/WalkFairmount 5k Walk +4

From $20 Open Closing Soon

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Horsetooth Half Marathon - Presented by Fort Collins Connexion

Sun, Apr 19 · Fort Collins, CO Fort Collins

Road Half Marathon

From $75 Open Closing Soon

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Hot Laps - Denver

Fri, Apr 24 · Denver, CO Denver

Road Hot Laps

From $10 Open

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SOAR 5K

Sat, Apr 25 · Golden, CO Golden

Road SOAR 5K WalkSOAR 5K Run

From $15 Open

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Alpine Autism Center 19th Annual "Run for the One" 5k Walk/Run

Sat, Apr 25 · Colorado Springs, CO Colorado Springs

Road 5K (Adult 13 and up)5K (Child 5 and Under)5K (Child 6-12)

From $0 Open

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2026 Manion WOD - Coal Creek CrossFit

Sat, Apr 25 · Superior, CO Superior

Manion WOD Workout

From $34 Open 20 spots left

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2026 Manion WOD - B3 Nutrition + Fitness

Sat, Apr 25 · Fort Morgan, CO Fort Morgan

Manion WOD Workout

From $34 Open 16 spots left

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Strut for Mutts 2026

Sat, Apr 25 · Rifle, CO Rifle

Road Strut for Mutts 2026

From $30 Open

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Bigfoot Half Marathon

Sat, Apr 25 · Estes Park, CO Estes Park

Road 5K Run/WalkHalf Marathon

From $45 Open Closing Soon

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

Sat, Apr 25 · Centennial, CO Centennial

Virtual Family 1 Mile Fun Run5K RegistrationVirtual Run Registration +3

From $30 Open

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Runs With Scissors Races

Sat, Apr 25 · Brighton, CO Brighton

Virtual Half MarathonMarathon50K Ultra Marathon +3

From $35 Open Closing Soon 35 spots left

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

Sat, Apr 25 · 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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Unicorn 5k (Denver-East)

Sun, Apr 26 · Denver, CO Denver

Road 5k1/2 Mile(ish) Saunter

From $13 Open

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Funner to be a Runner

Sun, Apr 26 · Pueblo, CO Pueblo

Road 1.2-mile run (grades 4-8)50-yard dash1.2-mile run (grades 3 & under)

From $0 Open

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Pueblo Spring Runoff

Sun, Apr 26 · Pueblo, CO Pueblo

Road 5K Run10M Run10K Run

From $35 Open

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Blue Heron Half & 5K

Sun, Apr 26 · Brighton, CO Brighton

Road 5kHalf-Marathon

From $30 Open Closing Soon

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2026 Flying Pig 5K

Sun, Apr 26 · Fort Collins, CO Fort Collins

Road 2026 Flying Pig 5K

From $40 Open

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2026 Manion WOD - Colorado Spartans

Sun, Apr 26 · Parker, CO Parker

Manion WOD WorkoutManion WOD Ruck Workout

From $34 Open

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2026 Dash & Dine 5k Run Series

Tue, Apr 28 · Boulder, CO Boulder

Road #4 May 19#3 May 12#2 May 5 +2

From $35 Open Closing Soon

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Everest Challenge

Fri, May 1 · U S A F Academy, CO U S A F Academy

Virtual Everest Challenge

From $20 Open

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CollaBEERation 5k & Brew Fest Party

Sat, May 2 · Longmont, CO Longmont

Road 9th edition CollaBEERation 5k & Brew Fest Party - WAVE A (Running 25 Minutes & Under)9th edition CollaBEERation Brew Fest Party - Brew Fest Attendee Only9th edition CollaBEERation 5k & Brew Fest Party - WAVE B (Run/Walk Over 25+ Minutes)

From $40 Open 75 spots left

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Sunrise Marathon 5K/10K/13.1 DENVER/AURORA

Sat, May 2 · 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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Walk Run or Roll for Daniel

Sat, May 2 · Colorado Springs, CO Colorado Springs

Road Kids 15 and under 5k Walk/Run5K Walk/Run15 Mile Bike Ride +1

From $15 Open Closing Soon

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Adams County Foster Care 5K Run/Walk and 1 mile fun run

Sat, May 2 · Brighton, CO Brighton

Road 1 Mile Fun Run5K Students/Youth 18 & UnderAdult 5K +2

From $0 Open Closing Soon

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DU Spring Sprint 5k

Sat, May 2 · Gunnison, CO Gunnison

Road DU Spring Sprint

From $10 Open

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Nielson Challenge

Sat, May 2 · Colorado Springs, CO Colorado Springs

Open

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High Line Canal 5K/10K Run

Sat, May 2 · Centennial, CO Centennial

Road High Line Canal Run 5KHigh Line Canal Run 10KHigh Line Canal Run Both 5K & 10K

From $35 Open Closing Soon

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