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.

The Hero's Journey 5K

Sat, Jul 25 · Aurora, CO Aurora

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

From $10 Open

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

Sat, Jul 25 · Centennial, CO Centennial

Virtual Family 1 Mile Fun RunVirtual Run Registration5K/10K/13.1 Eco-Registration (No Shirt) +3

From $30 Open

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

From $30 Open

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CEROX + IRON

Sat, Jul 25 · Frederick, CO Frederick

Cerox Iron Teams of 2Cerox IndividualCerox Iron Individual +1

From $45 Open

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Living Journeys 2026 Summit Hike

Sat, Jul 25 · Crested Butte, CO Crested Butte

Hike

From $40 Open

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Spirit of the West 5K Run/Walk

Sun, Jul 26 · Golden, CO Golden

Road 5K Run/Walk

From $35 Open

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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

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Wild West Relay

Fri, Jul 31 · Fort Collins, CO Fort Collins

Wild West Relay - Get Your Ass Over the Pass - Ultra team (4-6 runners)Wild West Relay - Get Your Ass Over the Pass - Super Ultra team (1-3 runners)Wild West Relay - Get Your Ass Over the Pass - High School Team +1

From $660 Open

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Flying Colors 5K Fun Run/Walk

Sat, Aug 1 · Craig, CO Craig

Road 5K Fun Run/Walk

From $30 Open

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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

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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

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2026 Rocky Mountain Strength Rendezvous

Sat, Aug 1 · Littleton, CO Littleton

2026 Rocky Mountain Strength Rendezvous

From $75 Open 60 spots left

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12th Annual Run for the Ring

Sat, Aug 1 · Aurora, CO Aurora

Virtual Virtual 5K Run/Walk5K Race - Run/WalkSleep In +1

From $14.5 Open

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Popsicle 5K/10K/Half - Colorado Springs

Sat, Aug 1 · Colorado Springs, CO Colorado Springs

Virtual 5K-No ShirtVirtual 5K5K +6

From $25 Open

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Kennebec Mountain Run

Sat, Aug 1 · Hesperus, CO Hesperus

Trail 15 Mile

From $75 Open

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Sheep Mountain Trail Runs

Sat, Aug 1 · Fairplay, CO Fairplay

Trail Half Marathon50k50-Mile

From $70 Open

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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

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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

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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

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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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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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RMRR August Trophy Series

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 75 spots left

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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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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

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Eat. Run. Adopt. 10K

Sat, Aug 8 · Berthoud, CO Berthoud

Road 10KCHILD CARE

From $5 Open

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HRCA Splash Mash Dash Kids Triathlon

Sat, Aug 8 · Littleton, CO Littleton

Triathlon Kids Triathlon

From $45 Open

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Fort Collins Running Summit

Sat, Aug 8 · Fort Collins, CO Fort Collins

2026 Fort Collins Running Summit

From $80 Open Closing Soon

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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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Pancake Stampede 5K

Sun, Aug 9 · Littleton, CO Littleton

Road 5K

From $20 Open

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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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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 Bullfrog Summer Surge

Sun, Aug 9 · Lakewood, CO Lakewood

Road Bullfrog Hot Lap5K Run (Timed)

From $20 Open Closing Soon

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Into the Hills Eltuck 10k

Tue, Aug 11 · Bellvue, CO Bellvue

Trail Into the Hills Eltuck 10k

From $25 Open

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South Fork Pandemonium

Fri, Aug 14 · South Fork, CO South Fork

Pandemonium-Main EventPandemonium-Family Style

From $30 Open 72 spots left

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The Cheyenne Mountain Run

Sat, Aug 15 · Colorado Springs, CO Colorado Springs

Trail 5K10K25K

From $40 Open

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Run for PB& J 5K/10K/13.1 DENVER/AURORA

Sat, Aug 15 · 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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Sunrise Stampede

Sat, Aug 15 · Longmont, CO Longmont

Road FREE 1 MILE ENTRIES: First 25 SVVSD Students to enter!!!1 Mile Fun Run/Walk (all ages)FREE 5K ENTRIES: First 75 SVVSD Students to enter!!! +2

From $0 Open 25 spots left

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

Sat, Aug 15 · 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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Erie Half & 5k

Sun, Aug 16 · Erie, CO Erie

Road 5kHalf Marathon

From $30 Open

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Into the Hills Eltuck 5k

Tue, Aug 18 · Bellvue, CO Bellvue

Trail Into the Hills Eltuck 5k

From $25 Open

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Byers Peak Stampede Half Marathon & 5K Run

Sat, Aug 22 · Fraser, CO Fraser

Road 5KHalf Marathon

From $45 Open

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Staunton Rocks! Marathon and Half Marathon

Sat, Aug 22 · Pine, CO Pine

Road Staunton Rocks! Half MarathonStaunton Rocks! Marathon

From $90 Open Closing Soon

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CEROX IRON + IRON X

Sat, Aug 22 · Frederick, CO Frederick

Cerox Iron IndividualCerox Iron Teams of 2Cerox Iron X Individual +1

From $45 Open

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2026 True Impact Ministries 5K/10K

Sat, Aug 22 · Centennial, CO Centennial

5K Run or Walk10k Run or Walk

From $39 Open 30 spots left

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Ram Run

Sat, Aug 22 · Denver, CO Denver

Virtual Ram Run Kids Race (12 and under)Ram Run - VirtualRam Run

From $10 Open Closing Soon

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Gunnison Valley Triathlon

Sat, Aug 22 · Gunnison, CO Gunnison

Triathlon Team RelayYouth Team RelayKids Triathlon +1

From $25 Open

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Rebel Run 5k

Sun, Aug 23 · Denver, CO Denver

Virtual 5k Run5k Walk5k Virtual Race

From $10 Open Closing Soon

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