Running Races in Colorado — 2026

There are 403 running races in Colorado in 2026 across 102 cities. The next upcoming race is the Yampa River Festival 2026 in Steamboat Springs on May 30. Popular distances include 5K races, trail runs, half marathons.

Pioneer Prairie Dog Half, 10k & 5k

Sun, Aug 23 · Westminster, CO Westminster

Road 5k10kHalf Marathon

From $25 Open

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Eltuck Valley 12K - Lory Summer Trail Series

Tue, Aug 25 · Bellvue, CO Bellvue

Trail Eltuck Valley 12k

From $25 Open

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Rocky Mountain 5K presented by School District 11

Sat, Aug 29 · Colorado Springs, CO Colorado Springs

Road Rocky Mountain 5K

From $35 Open

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Historic Elizabeth Main Street 5K & Family Color Run

Sat, Aug 29 · Elizabeth, CO Elizabeth

Road Family Color Run5K Run/Walk

From $10 Open

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RexRun For PAWSitivity 2026 Trail Run/Walk

Sat, Aug 29 · Aurora, CO Aurora

Road Kids 1-mile Run/Walk5K Trail RunFamily 5K Trail Walk

From $20 Open

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Run Like the Wind 5k / 2k / Dog Jog

Sat, Aug 29 · Allenspark, CO Allenspark

Road 2k Run / Walk5K Run

From $20 Open

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TBK Bank Thirsty 13 Half Marathon

Sat, Aug 29 · Durango, CO Durango

Road Just The Race -- No Brewfest TicketRace Plus Brewfest

From $85 Open Closing Soon

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Run for Breast Cancer 5K/10K/13.1 DENVER/AURORA

Sat, Aug 29 · 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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Glow & Roll: Illuminate What's Possible

Sat, Aug 29 · Littleton, CO Littleton

Virtual 1.6 Mile Walk/Run/Roll5K Walk/Run/RollVirtual Participant

From $35 Open

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

Sat, Aug 29 · 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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Run for Hope - Colorado Springs

Sat, Aug 29 · Colorado Springs, CO Colorado Springs

Virtual Memorial Mile5K Run/WalkVirtual Race

From $25 Open

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Wine Run 5k at The Winery at Holy Cross Abbey

Sun, Aug 30 · Canon City, CO Canon City

Road 5kVolunteer and Run 8:00am to 9:30amVolunteer with check-in 9:30am-11:00am then Run

From $15 Open Closing Soon 5 spots left

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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 - Denver

Sat, Sep 5 · Denver, CO Denver

Virtual 1 Mile5K10K +4

From $17 Open Closing Soon 5 spots left

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Cirque Series - Arapahoe Basin, CO

Sat, Sep 5 · Keystone, CO Keystone

Trail Expert DivisionPro DivisionSport Division (beginner / intermediate)

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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Raising the Barr

Sat, Sep 5 · Brighton, CO Brighton

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

From $55 Open

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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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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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FCA All-Abilities Labor Day 5K

Mon, Sep 7 · Loveland, CO Loveland

Road FCA All-Abilities Labor Day 5k

From $65 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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Labor Day Half Marathon

Mon, Sep 7 · Parker, CO Parker

Road 5K10KHalf Marathon +1

From $27 Open

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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

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

From $623 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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National Chocolate Day: Run for Chocolates 5K/10K/13.1 DENVER/AURORA

Sat, Sep 12 · 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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2026 Lake Nighthorse Triathlon - Sprint and Olympic

Sat, Sep 12 · Durango, CO Durango

Triathlon Individual SprintSprint Relay - MaleSprint Relay - Female +2

From $85 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 Registration5K/10K/13.1 Eco-Registration (No Shirt) +3

From $30 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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6 Dot Dash

Sat, Sep 12 · Littleton, CO Littleton

Virtual Virtual 5K5K

From $40 Open

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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

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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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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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Black Squirrel Half Marathon

Sat, Sep 12 · Bellvue, CO Bellvue

Road Black Squirrel Half Marathon

From $90 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

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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 $15 Open

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Honey Bee Hustle

Sun, Sep 13 · Loveland, CO Loveland

Road ChallengeMini Honey Bee Hustle

From $15 Open

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RMRR September Trophy Series

Sun, Sep 13 · Thornton, CO Thornton

Road 5k10k

From $10 Open

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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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Lederhosen Race 2026

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

Road Lederhosen Fun Run

From $35 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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All-Out Fall Fest

Sat, Sep 19 · Westminster, CO Westminster

Virtual 5KVIRTUAL 5K10K +3

From $20 Open

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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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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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Wellington STAR Foundation 5K 10K

Sat, Sep 19 · Wellington, CO Wellington

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

From $10 Open Closing Soon

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Beulah Challenge and OverIt Series

Sat, Sep 19 · Beulah, CO Beulah

Road 5K - Age 17 & Under5K10K - Age 17 & Under +3

From $20 Open

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Denver: Walk With Autism and Resource Fair

Sat, Sep 19 · Denver, CO Denver

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

From $0 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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20th Annual Golden Gallop

Sun, Sep 20 · Golden, CO Golden

Road 5K10K20K Challenge - ONLY 10K completed on race day, remaining 10K done virtually +2

From $25 Open Closing Soon

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7th ANNUAL PAUL'S MYSTERY SHIP WALK TO END ALS

Sun, Sep 20 · Castle Rock, CO Castle Rock

7th ANNUAL PAUL'S MYSTERY SHIP WALK TO END ALS

From $45 Open

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