Running Races in Colorado — 2026

There are 308 running races in Colorado in 2026 across 91 cities. The next upcoming race is the Raising the Barr in Brighton on September 5. Popular distances include 5K races, half marathons, trail runs.

4th Annual Roost Rebellion Relays

Wed, Sep 2 · Denver, CO Denver

Road Sponsored RelayOpen RelayElite Relay

From $100 Open Closing Soon

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Summit Middle School Invitational

Wed, Sep 2 · Breckenridge, CO Breckenridge

Road Boys Cross Country RaceGirls Cross Country Race

From $0 Open

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Break Your Neck: Walk, Run, or Roll

Sat, Sep 5 · Pueblo, CO Pueblo

Open Closing Soon

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The Beaver Run

Sat, Sep 5 · Breckenridge, CO Breckenridge

Road 5K Run10K Run15K Run

From $40 Open Closing Soon

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Raising the Barr

Sat, Sep 5 · Brighton, CO Brighton

Road 6 hour - Relay ULTRA (2-3 people)12 hour - Solo12 hour - Relay ULTRA (2-3 people) +3

From $55 Open Closing Soon

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Cirque Series - Arapahoe Basin, CO

Sat, Sep 5 · Keystone, CO Keystone

Trail Pro DivisionSport Division (beginner / intermediate)Expert Division

From $90.15 Open Closing Soon

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Recovery Run of the Rockies 5K

Sat, Sep 5 · Fort Collins, CO Fort Collins

Road 5K

From $30 Open Closing Soon

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Golden Harvest Half Marathon & 5k/10k - Denver

Sat, Sep 5 · Westminster, CO Westminster

Virtual 1 Mile5K10K +4

From $17 Open Closing Soon 5 spots left

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Nielson Challenge

Sat, Sep 5 · Colorado Springs, CO Colorado Springs

Open Closing Soon

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10k at 10,000 Feet

Sun, Sep 6 · Steamboat Springs, CO Steamboat Springs

Road 5k10k

From $25 Open Closing Soon

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Golden Harvest Half Marathon & 5k/10k - Colorado Springs

Sun, Sep 6 · Colorado Springs, CO Colorado Springs

Virtual 1 Mile5K10K +4

From $17 Open Closing Soon 5 spots left

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Oak Creek No Fun Run

Mon, Sep 7 · Oak Creek, CO Oak Creek

Road 5K

From $25 Open Closing Soon

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T&H RSU TEMPLATE

Mon, Sep 7 · Fort Collins, CO Fort Collins

Open Closing Soon

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Labor Day Half Marathon

Mon, Sep 7 · Parker, CO Parker

Road 5K10KVirtual Race +1

From $27 Open Closing Soon

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FCA All-Abilities Labor Day 5K

Mon, Sep 7 · Loveland, CO Loveland

Virtual The Mighty MileAll-Abilities Athlete 5kVirtual Run Where You Are +1

From $10 Open Closing Soon

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FCA All Abilities Labor Day 5K

Mon, Sep 7 · Loveland, CO Loveland

Road FCA All Abilities 5K and Run A Thon

From $65 Open Closing Soon

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14th Annual Superhero Event

Thu, Sep 10 · Greeley, CO Greeley

Virtual 1 Mile - 12 & Under1 Mile - 13+Virtual 1 Mile +5

From $20 Open Closing Soon

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Res Hill Ruck

Fri, Sep 11 · Pagosa Springs, CO Pagosa Springs

Trail Res Hill Ruck

From $40 Open Closing Soon

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Flaming Foliage Relay - Idaho Springs to Buena Vista

Fri, Sep 11 · Idaho Springs, CO Idaho Springs

Flaming Foliage Relay - Super Ultra (1-3 runners)Flaming Foliage Relay - 10 person Team (6-10 runners)Flaming Foliage Relay - Ultra Team (4-5 Runners)

From $623 Open Closing Soon

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Black Squirrel Half Marathon

Sat, Sep 12 · Bellvue, CO Bellvue

Road Black Squirrel Half Marathon

From $90 Open Closing Soon

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2026 Lake Nighthorse Triathlon - Sprint and Olympic

Sat, Sep 12 · Durango, CO Durango

Triathlon Individual SprintSprint Relay - MaleSprint Relay - Coed +2

From $85 Open Closing Soon 9 spots left

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53rd Annual Imogene Pass Run

Sat, Sep 12 · Telluride, CO Telluride

Trail 53rd Annual Imogene Pass Run

From $130 Open Closing Soon

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Trail Sisters Women's Half Marathon & 10k

Sat, Sep 12 · Buena Vista, CO Buena Vista

Trail Trail Sisters Women's 10kTrail Sisters Women's Half Marathon

From $55 Open Closing Soon

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Steele Trap Trail Run

Sat, Sep 12 · Loma, CO Loma

Road Steele Trap Trail Run

From $50 Open

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6 Dot Dash

Sat, Sep 12 · Littleton, CO Littleton

Virtual 5KVirtual 5K

From $40 Open Closing Soon

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National Chocolate Day: Run for Chocolates 5K/10K/13.1 DENVER/AURORA

Sat, Sep 12 · Centennial, CO Centennial

Virtual Family 1 Mile Fun Run5K RegistrationVirtual Run Registration +3

From $30 Open Closing Soon

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The 10th Annual Run4Hope 5K for Schools

Sat, Sep 12 · Monument, CO Monument

Road 2-Mile Color Fun Run - Family of 3 or more2-Mile Color Fun Run - IndividualSchool Team 5K (competitive chip -timed race 8-15 runners/walkers) +1

From $30 Open Closing Soon 15 spots left

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For The City Network 5K

Sat, Sep 12 · Greeley, CO Greeley

Road For The City Network 5K

From $35 Open Closing Soon

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The Denver 5k

Sat, Sep 12 · Denver, CO Denver

Road 5kFREE Kids Fun Run

From $0 Open Closing Soon

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

Sat, Sep 12 · Centennial, CO Centennial

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

From $30 Open Closing Soon

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Spirit of the Valley 5k

Sat, Sep 12 · Grand Junction, CO Grand Junction

Road 5k Run1K Run5K Roll +1

From $10 Open Closing Soon

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Tater Trot 5K

Sat, Sep 12 · Monte Vista, CO Monte Vista

Tater Trot 5K Walk & Run

From $25 Open Closing Soon

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Mad Dash 5K

Sun, Sep 13 · Milliken, CO Milliken

Mad Dash 5K

From $40 Open Closing Soon

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Healthy Kids Running Series Fall 2026 - Fort Collins, CO

Sun, Sep 13 · Fort Collins, CO Fort Collins

Road Kindergarten & 1st Grade - 1/4 Mile2nd & 3rd Grade - 1/2 MilePreK 2/3 Yr Old - 50 Yard Dash +21

From $15 Open Closing Soon

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RMRR Fall Marathon Training Series #2

Sun, Sep 13 · Thornton, CO Thornton

Road RMRR Fall Marathon Training Series #2 - 20kmRMRR Fall Marathon Training Series #2 - 30km

From $20 Open Closing Soon

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RMRR September 5k/10k

Sun, Sep 13 · Thornton, CO Thornton

Road 5k10k

From $10 Open Closing Soon

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31st El Grito 5k (2026)

Sun, Sep 13 · Denver, CO Denver

Road 31st El Grito 5k (2026) - Regular Registration31st El Grito 5k (2026) - Student Registration

From $20 Open Closing Soon

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9/11 Heroes Run - Denver, Colorado

Sun, Sep 13 · Denver, CO Denver

Road 1-Mile Run/Walk5K Run - PUSHER5K Ruck - Active Duty Military or First Responder +3

From $21 Open Closing Soon

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Colorado Run for the Fallen Run/Walk/Ruck

Sun, Sep 13 · Palmer Lake, CO Palmer Lake

Road Ruck to RememberRun/Walk to Remember

From $35 Open Closing Soon

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FalconTri

Sun, Sep 13 · U S A F Academy, CO U S A F Academy

Triathlon NCAA Division 1 Triathlon WomenCollegiate Women TriathlonCadet Women +3

From $15 Open Closing Soon

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Springs Kids Triathlon

Sun, Sep 13 · Colorado Springs, CO Colorado Springs

Triathlon Springs Kids Triathlon

From $25 Open Closing Soon 42 spots left

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Tiger Prowl 5K

Sun, Sep 13 · Denver, CO Denver

Road Tiger Prowl 5K Fun Run/WalkTiger Prowl Youth 5K---register your 12 and under child here*Tiger Prowl 5K Chill Option

From $20 Open Closing Soon

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Healthy Kids Running Series Fall 2026 - Denver, CO

Sun, Sep 13 · Denver, CO Denver

Road Single Day Walk Up Week 2Single Day Walk Up Week 1Challenger Division - 75 Yard Dash +21

From $15 Open Closing Soon

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FCRC Timber Social Run & Breakfast

Sun, Sep 13 · Bellvue, CO Bellvue

Open Closing Soon

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Honey Bee Hustle

Sun, Sep 13 · Loveland, CO Loveland

Road Mini Honey Bee HustleChallenge

From $15 Open Closing Soon

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Severance Glow 5K Run or Walk

Fri, Sep 18 · Severance, CO Severance

Road Severance Glow 5K

From $30 Open

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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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2026 ColorFest Color Run/Walk 5K

Sat, Sep 19 · Pagosa Springs, CO Pagosa Springs

Road 5K Run/Walk

From $35 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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Pikes Peak Ascent

Sat, Sep 19 · Manitou Springs, CO Manitou Springs

Road AscentHalf Priced Award Entry

From $87.5 Open Closing Soon

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