Running Races in Colorado — 2026

There are 351 running races in Colorado in 2026 across 96 cities. The next upcoming race is the 14er Challenge in Buena Vista on July 23. Popular distances include 5K races, half marathons, trail runs.

BRR All-Comers Summer Track & Field Series #4

Thu, Jul 23 · Boulder, CO Boulder

Road Steeplechase 3k100M200M +11

From $20 Open Closing Soon 15 spots left

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Flyin' Ryan Memorial 5k

Fri, Jul 24 · Loveland, CO Loveland

Road Flyin' Ryan Memorial 5k

From $28 Open Closing Soon

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

Sat, Jul 25 · Centennial, CO Centennial

Virtual Family 1 Mile Fun Run5K/10K/13.1 Eco-Registration (No Shirt)5K Registration +3

From $30 Open Closing Soon

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Living Journeys 2026 Summit Hike

Sat, Jul 25 · Crested Butte, CO Crested Butte

Hike

From $40 Open Closing Soon

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

Sat, Jul 25 · Centennial, CO Centennial

Virtual Family Fun Run 1 Mile5K RegistrationVirtual Run Registration (5K/10K/13.1) +3

From $30 Open Closing Soon

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The Hero's Journey 5K

Sat, Jul 25 · Aurora, CO Aurora

Virtual Kids Fun Run5K (21 and older)5K Under 21 +1

From $10 Open Closing Soon

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Beas Knees Citizens' Race and National High School Trail Championships

Sat, Jul 25 · Salida, CO Salida

Trail Girls' National ChampionshipBoys' National ChampionshipBeas Knees Citizens' Race

From $25 Open Closing Soon

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CEROX + IRON

Sat, Jul 25 · Frederick, CO Frederick

Cerox Teams of 2Cerox IndividualCerox Iron Individual +1

From $45 Open Closing Soon

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Christmas 5K/10K/Half Marathon in July Meet Up - Denver

Sat, Jul 25 · Littleton, CO Littleton

Virtual 5K10KHalf Marathon

From $35 Open Closing Soon

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Aspen Valley Marathon

Sat, Jul 25 · Aspen, CO Aspen

Road Aspen Valley Marathon 5KAspen Valley HALF MarathonAspen Valley Marathon

From $55 Open Closing Soon

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2nd Annual Pancreatic Cancer Awareness in Honor of Diana Cantu - 5K Fun Run/Walk

Sat, Jul 25 · Alamosa, CO Alamosa

Road 5k Run/walk - 18 & Over5k Run/walk - 16 & Under

From $18 Open Closing Soon

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SIC Mile/2 Mile Run or Walk

Sun, Jul 26 · Pueblo, CO Pueblo

Road SIC Mile/2 Mile Run or Walk

From $25 Open Closing Soon

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World Championship Pack Burro Race

Sun, Jul 26 · Fairplay, CO Fairplay

Ultra Short Course, approximately 12.3 milesLong Course, 29+ miles

From $70 Open Closing Soon

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Spirit of the West 5K Run/Walk

Sun, Jul 26 · Golden, CO Golden

Road 5K Run/Walk

From $35 Open Closing Soon

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Wild West Relay

Fri, Jul 31 · Fort Collins, CO Fort Collins

Wild West Relay - Get Your Ass Over the Pass - Super Ultra team (1-3 runners)Wild West Relay - Get Your Ass Over the Pass - 12 person team (7-12 runners)Wild West Relay - Get Your Ass Over the Pass - Ultra team (4-6 runners) +1

From $660 Open Closing Soon

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Popsicle 5K/10K/Half - Colorado Springs

Sat, Aug 1 · Colorado Springs, CO Colorado Springs

Virtual 5KVirtual 5K5K-No Shirt +6

From $25 Open Closing Soon

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12th Annual Run for the Ring

Sat, Aug 1 · Aurora, CO Aurora

Virtual 5K Race - Run/WalkVirtual 5K Run/WalkKids Fun Run +1

From $14.5 Open Closing Soon

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Sheep Mountain Trail Runs

Sat, Aug 1 · Fairplay, CO Fairplay

Trail Half Marathon50k50-Mile

From $70 Open Closing Soon

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Move with MADD Denver 5K

Sat, Aug 1 · Denver, CO Denver

Road Dog 5KTimed 5KUntimed Walk

From $15 Open Closing Soon

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Nielson Challenge

Sat, Aug 1 · Colorado Springs, CO Colorado Springs

Open Closing Soon

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2026 Rocky Mountain Strength Rendezvous

Sat, Aug 1 · Littleton, CO Littleton

2026 Rocky Mountain Strength Rendezvous

From $75 Open Closing Soon 60 spots left

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STEPS TO EMPOWER

Sat, Aug 1 · Colorado Springs, CO Colorado Springs

Virtual Steps to Empower 1 Mile Walk/RunVIRTUAL Steps to EmpowerSteps to Empower 5K Walk/Run

From $25 Open Closing Soon

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Snowshoe Shuffle 5K Run

Sat, Aug 1 · Creede, CO Creede

Road 5K RunSnowshoe Shuffle 5K Walk

From $25 Open Closing Soon

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Flying Colors 5K Fun Run/Walk

Sat, Aug 1 · Craig, CO Craig

Road 5K Fun Run/Walk

From $30 Open Closing Soon

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Shootout for Soldiers Colorado

Sat, Aug 1 · Littleton, CO Littleton

Team RegistrationPlayer Registration with Game JerseyFull Field Registration

From $50 Open Closing Soon

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Kennebec Mountain Run

Sat, Aug 1 · Hesperus, CO Hesperus

Trail 15 Mile

From $75 Open Closing Soon

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Unicorn 5k (South)

Sat, Aug 1 · Highlands Ranch, CO Highlands Ranch

Road 5k Run/Walk3/4 (ish) Mile Saunter

From $13 Open Closing Soon

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RunAbilities FUN Walk/Run/Roll

Sat, Aug 1 · Parker, CO Parker

Road 2 Mile Bike Ride2 Mile Walk/Run/Roll

From $25 Open Closing Soon

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Bound for Boston Marathon & Half Marathon - Denver

Sun, Aug 2 · Denver, CO Denver

Virtual Half MarathonVirtual Half MarathonVirtual Marathon +1

From $25 Open Closing Soon

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Boulder Kids' Tri Camp

Mon, Aug 3 · Boulder, CO Boulder

Triathlon Boulder Kids' Tri Camp

From $200 Open Closing Soon 30 spots left

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Eltuck Valley 5K - Lory Summer Trail Series

Tue, Aug 4 · Fort Collins, CO Fort Collins

Road Eltuck Valley 5k

From $25 Open Closing Soon

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Eldorado Run for the Cure

Thu, Aug 6 · Eldorado Springs, CO Eldorado Springs

Road Eldorado Run for the Cure

From $30 Open

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BRR All-Comers Summer Track & Field Series #5

Thu, Aug 6 · Boulder, CO Boulder

Road 100M200M400M +9

From $20 Open 15 spots left

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RMRR August 5km and picnic

Fri, Aug 7 · Centennial, CO Centennial

Road 5k

From $10 Open

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Choice City Running Festival

Fri, Aug 7 · Fort Collins, CO Fort Collins

Road Jane Welzel Mountain Avenue MileHuman Race 5kHuman Race 10k +4

From $20 Open Closing Soon

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Pat's Pony Express

Sat, Aug 8 · Woodland Park, CO Woodland Park

Trail Pat's Pony Express - 8 MilePat's Pony Express - 16 Mile

From $65 Open Closing Soon 75 spots left

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Dog Days of Summer

Sat, Aug 8 · Longmont, CO Longmont

Road Kidz DashDog Days of Summer 3.5 Loop

From $20 Open 25 spots left

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All-Out Runapalooza

Sat, Aug 8 · Arvada, CO Arvada

Virtual VIRTUAL 5K5KVIRTUAL 10K +3

From $20 Open Closing Soon

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Escalante Days 5K

Sat, Aug 8 · Dolores, CO Dolores

Road 5K

From $30 Open Closing Soon

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Summer Sizzler- Denver

Sat, Aug 8 · Thornton, CO Thornton

Virtual 1 Mile5k10k +4

From $17 Open 5 spots left

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Arapahoe Warrior 5K

Sat, Aug 8 · Centennial, CO Centennial

Road Warrior 5K

From $25 Open Closing Soon

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Eat. Run. Adopt. 10K

Sat, Aug 8 · Berthoud, CO Berthoud

Road 10KCHILD CARE

From $5 Open Closing Soon

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Fort Collins Running Summit

Sat, Aug 8 · Fort Collins, CO Fort Collins

2026 Fort Collins Running Summit

From $80 Open

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5K at the Fair

Sat, Aug 8 · Durango, CO Durango

Road 5K at the Fair

From $20 Open

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HRCA Splash Mash Dash Kids Triathlon

Sat, Aug 8 · Littleton, CO Littleton

Triathlon Kids Triathlon

From $45 Open Closing Soon

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Summer Sizzler- Colorado Springs

Sun, Aug 9 · Colorado Springs, CO Colorado Springs

Virtual 1 Mile5K10K +4

From $17 Open 5 spots left

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The Berkeley Circuit

Sun, Aug 9 · Denver, CO Denver

Road The Berkeley Circuit

From $25 Open Closing Soon

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Leadville Boomdays International Pack Burro Race

Sun, Aug 9 · Leadville, CO Leadville

Road SHORT COURSE: Leadville Boomdays International Pack Burro RaceLONG COURSE: Leadville Boomdays International Pack Burro Race

From $65 Open

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The Bullfrog Summer Surge

Sun, Aug 9 · Lakewood, CO Lakewood

Road Bullfrog Hot Lap (Open)5K Run (Timed)

From $10 Open 25 spots left

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Pancake Stampede 5K

Sun, Aug 9 · Littleton, CO Littleton

Road 5K

From $20 Open Closing Soon

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