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.

Staunton Rocks! Marathon and Half Marathon

Sat, Aug 22 · Pine, CO Pine

Road Staunton Rocks! Half MarathonStaunton Rocks! Marathon

From $90 Open

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Gunnison Valley Triathlon

Sat, Aug 22 · Gunnison, CO Gunnison

Triathlon Sprint TriathlonTeam RelayYouth Team Relay +1

From $25 Open

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Rebel Run 5k

Sun, Aug 23 · Denver, CO Denver

Virtual 5k Walk5k Run5k Virtual Race

From $10 Open

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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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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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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 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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TBK Bank Thirsty 13 Half Marathon

Sat, Aug 29 · Durango, CO Durango

Road Race Plus BrewfestJust The Race -- No Brewfest Ticket

From $85 Open Closing Soon

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

Sat, Aug 29 · 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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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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Sloth Run 5K/10K/13.1 DENVER/AURORA

Sat, Aug 29 · Centennial, CO Centennial

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

From $30 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 with check-in 9:30am-11:00am then RunVolunteer and Run 8:00am to 9:30am

From $15 Open 5 spots left

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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 12 hour - Relay ULTRA (2-3 people)12 hour - Solo6 hour - Relay ULTRA (2-3 people) +3

From $55 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 5 spots left

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Cirque Series - Arapahoe Basin, CO

Sat, Sep 5 · Keystone, CO Keystone

Trail Pro DivisionExpert DivisionSport Division (beginner / intermediate)

From $90.15 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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Labor Day Half Marathon

Mon, Sep 7 · Parker, CO Parker

Road 5K10KVirtual Race +1

From $27 Open

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Flaming Foliage Relay - Idaho Springs to Buena Vista

Fri, Sep 11 · Idaho Springs, CO Idaho Springs

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

From $623 Open

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Break Your Neck: Walk, Run, or Roll

Sat, Sep 12 · Pueblo, CO Pueblo

Open

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2026 Lake Nighthorse Triathlon - Sprint and Olympic

Sat, Sep 12 · Durango, CO Durango

Triathlon Sprint Relay - FemaleIndividual SprintSprint Relay - Male +2

From $85 Open

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6 Dot Dash

Sat, Sep 12 · Littleton, CO Littleton

Virtual Virtual 5K5K

From $40 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

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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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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 $45 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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Steele Trap Trail Run

Sat, Sep 12 · Loma, CO Loma

Road Steele Trap Trail Run

From $50 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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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 $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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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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Severance Glow 5K Run or Walk

Fri, Sep 18 · Severance, CO Severance

Road Severance Glow 5K

From $30 Open

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Wellington STAR Foundation 5K 10K

Sat, Sep 19 · Wellington, CO Wellington

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

From $10 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

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All-Out Fall Fest

Sat, Sep 19 · Westminster, CO Westminster

Virtual VIRTUAL 5K5K10K +3

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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Autumn Run

Sat, Sep 19 · Buena Vista, CO Buena Vista

Road 5K10KHalf Marathon

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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Beulah Challenge and OverIt Series

Sat, Sep 19 · Beulah, CO Beulah

Road 5K - Age 17 & Under5K10K +3

From $20 Open

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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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Farmers 5000

Sun, Sep 20 · Wheat Ridge, CO Wheat Ridge

Virtual Adult 5K RegistrationHigh School Student and Staff 5K Registration. T-shirt included in registration.Alumni 5K Registration +4

From $10 Open

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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

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Pikes Peak Marathon

Sun, Sep 20 · Manitou Springs, CO Manitou Springs

Road MarathonHalf Priced Award Entry

From $100 Open

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Chile & Frijole Hot to Trot 5K & 10K

Sun, Sep 20 · Pueblo, CO Pueblo

Road 5K Run10K Run

From $35 Open

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