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.

RiseUP Elevation Challenge

Tue, Sep 1 · Colorado Springs, CO Colorado Springs

Virtual Distance ChallengeElevation Challenge

From $20 Open

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Recovery Run of the Rockies 5K

Sat, Sep 5 · Fort Collins, CO Fort Collins

Road 5K

From $30 Open

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Cirque Series - Arapahoe Basin, CO

Sat, Sep 5 · Keystone, CO Keystone

Trail Expert DivisionSport Division (beginner / intermediate)Pro Division

From $90.15 Open

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South Fork Alder Ass Race

Sat, Sep 5 · South Fork, CO South Fork

Virtual Alder Ass Race Mini CourseAlder Ass Race Standard CourseGhost Runners

From $40 Open

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

Sat, Sep 5 · Westminster, CO Westminster

Virtual 1 Mile5K10K +4

From $17 Open 5 spots left

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The Beaver Run

Sat, Sep 5 · Breckenridge, CO Breckenridge

Road 5K Run10K Run15K Run

From $40 Open

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Raising the Barr

Sat, Sep 5 · Brighton, CO Brighton

Road 6 Hour - Solo6 Hour - Relay Standard (4-8 people)6 hour - Relay ULTRA (2-3 people) +3

From $55 Open Closing Soon

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Break Your Neck: Walk, Run, or Roll

Sat, Sep 5 · Pueblo, CO Pueblo

Open

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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 5 spots left

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10k at 10,000 Feet

Sun, Sep 6 · Steamboat Springs, CO Steamboat Springs

Road 5k10k

From $25 Open

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Oak Creek No Fun Run

Mon, Sep 7 · Oak Creek, CO Oak Creek

Road 5K

From $25 Open

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FCA All-Abilities Labor Day 5K

Mon, Sep 7 · Loveland, CO Loveland

Virtual Mighty MileFCA All-Abilities Labor Day 5kAll-Abilities Athlete 5k +1

From $10 Open

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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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14th Annual Superhero Event

Thu, Sep 10 · Greeley, CO Greeley

Virtual 1 Mile - 12 & UnderVirtual 1 Mile1 Mile - 13+ +5

From $20 Open

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Flaming Foliage Relay - Idaho Springs to Buena Vista

Fri, Sep 11 · Idaho Springs, CO Idaho Springs

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

From $623 Open

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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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53rd Annual Imogene Pass Run

Sat, Sep 12 · Telluride, CO Telluride

Trail 53rd Annual Imogene Pass Run

From $130 Open

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Spirit of the Valley 5k

Sat, Sep 12 · Grand Junction, CO Grand Junction

Road 5k Run1K Roll5K Roll +1

From $10 Open

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2026 Lake Nighthorse Triathlon - Sprint and Olympic

Sat, Sep 12 · Durango, CO Durango

Triathlon Sprint Relay - MaleIndividual SprintSprint Relay - Female +2

From $85 Open Closing Soon

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For The City Network 5K

Sat, Sep 12 · Greeley, CO Greeley

Road For The City Network 5K

From $35 Open

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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/10K/13.1 Eco-Registration (No Shirt)5K Registration +3

From $30 Open

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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

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6 Dot Dash

Sat, Sep 12 · Littleton, CO Littleton

Virtual 5KVirtual 5K

From $40 Open

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The Denver 5k

Sat, Sep 12 · Denver, CO Denver

Road 5kFREE Kids Fun Run

From $0 Open

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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)Virtual Run Registration (5K/10K/13.1) +3

From $30 Open

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The 10th Annual Run4Hope 5K for Schools

Sat, Sep 12 · Monument, CO Monument

Road 5K Run (Competitive Chip-Timed Race)2-Mile Color Fun Run - Family of 3 or more2-Mile Color Fun Run - Individual

From $30 Open

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Black Squirrel Half Marathon

Sat, Sep 12 · Bellvue, CO Bellvue

Road Black Squirrel Half Marathon

From $90 Open

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Tater Trot 5K

Sat, Sep 12 · Monte Vista, CO Monte Vista

Tater Trot 5K Walk & Run

From $25 Open

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Healthy Kids Running Series Fall 2026 - Denver, CO

Sun, Sep 13 · Denver, CO Denver

Road 6th to 8th Grade - 1 MileSingle Day Walk Up Week 4Single Day Walk Up Week 5 +21

From $15 Open

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Tiger Prowl 5K

Sun, Sep 13 · Denver, CO Denver

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

From $20 Open

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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

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31st El Grito 5k (2026)

Sun, Sep 13 · Denver, CO Denver

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

From $20 Open

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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

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Springs Kids Triathlon

Sun, Sep 13 · Colorado Springs, CO Colorado Springs

Triathlon Springs Kids Triathlon

From $25 Open 42 spots left

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Honey Bee Hustle

Sun, Sep 13 · Loveland, CO Loveland

Road Mini Honey Bee HustleChallenge

From $15 Open

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9/11 Heroes Run - Denver, Colorado

Sun, Sep 13 · Denver, CO Denver

Road 1-Mile Run/Walk5K Ruck - Active Duty Military or First Responder5K Run +3

From $21 Open

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RMRR September 5k/10k

Sun, Sep 13 · Thornton, CO Thornton

Road 5k10k

From $10 Open

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FalconTri

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

Triathlon Cadet MenCollegiate Women TriathlonNCAA Division 1 Triathlon Women +3

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 Closing Soon

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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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Pikes Peak Ascent

Sat, Sep 19 · Manitou Springs, CO Manitou Springs

Road Half Priced Award EntryAscent

From $87.5 Open

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Autumn Run

Sat, Sep 19 · Buena Vista, CO Buena Vista

Road 5K10KHalf Marathon

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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Denver: Walk With Autism and Resource Fair

Sat, Sep 19 · Denver, CO Denver

Road Walk with Autism Denver- VirtualWalk with Autism Denver - Ages 3 - 12 (walk or 5K run option)Walk with Autism Denver- 2 and Under (walk or 5K run option) +1

From $0 Open

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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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Battle by the Brook

Sat, Sep 19 · Deckers, CO Deckers

Family RaceCompetitive Race

From $89 Open 75 spots left

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All-Out Fall Fest

Sat, Sep 19 · Westminster, CO Westminster

Virtual 5KVIRTUAL 5K10K +3

From $20 Open

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Beulah Challenge and OverIt Series - ON PAUSE DUE TO THE ASPEN ACRES FIRE

Sat, Sep 19 · Beulah, CO Beulah

Road 5K - Age 17 & Under5K10K +3

From $20 Open Closing Soon

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Lederhosen Race 2026

Sat, Sep 19 · Red Feather Lakes, CO Red Feather Lakes

Road Lederhosen Fun Run

From $35 Open

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Wellington STAR Foundation 5K 10K

Sat, Sep 19 · Wellington, CO Wellington

Road Stroller or Dog 5K5K RunKids 5K (ages 3-12) +3

From $10 Open

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