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.

GMR Backyard Ultra

Sat, May 23 · Golden, CO Golden

Road GMR Backyard Ultra

From $50 Open

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Memorial Day Run 5K/10K/13.1 DENVER/AURORA

Sat, May 23 · 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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2026 CKF Cape Town Marathon

Sun, May 24 · Aspen, CO Aspen

Open

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The Narrow Gauge Races

Sun, May 24 · Durango, CO Durango

Road The Narrow Gauge 5KThe Narrow Gauge 10 Mile

From $30 Open Closing Soon

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8th Annual Angel Run at Red Leg Brewing

Mon, May 25 · Colorado Springs, CO Colorado Springs

Road 5k Angel Run at Red Leg Brewing, Not Timed5k Angel Run at Red Leg Brewing, Timed10k Angel Run at Red Leg Brewing, Timed +1

From $35 Open

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Smiles For Miles Memorial Day Fun Run

Mon, May 25 · Pueblo, CO Pueblo

Open

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Yampa River Fest 2026

Fri, May 29 · Steamboat Springs, CO Steamboat Springs

Fish Creek Kayak Race (Test)SUP Downriver Race - Fetcher ParkCrazy River Dog +11

From $0 Open 50 spots left

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DRMABPsi 1–5K Walk, Run & Roll

Sat, May 30 · Denver, CO Denver

Road 1k2kKids Run +3

From $10 Open

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2026 MTHCF 5K

Sat, May 30 · Fruita, CO Fruita

Road 2026 Mike The Headless Chicken 5K

From $35 Open

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Weld Your Mettle Running Festival

Sat, May 30 · Eaton, CO Eaton

Virtual 7K Ruck (4.3 Miles)7k walk or run (4.3 miles)14 Mile +10

From $35 Open

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Dash4Hope 2026

Sat, May 30 · Greeley, CO Greeley

Road Dash4Hope 2026

From $15 Open

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M1LE Nation Challenge

Sat, May 30 · Anywhere, CO Anywhere

Virtual M1LE Nation- Virtual RaceTeam M1LE Nation- Virtual RaceTeam M1LE Nation- LIVE Race +1

From $10 Open

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Mile High Rescue Sixth annual 5K! Running for Rescues! & Summer Kick Off Party

Sun, May 31 · Englewood, CO Englewood

Virtual 1 Mile Fun Run - VirtualRunning for Rescues! 1 Mile - Onsite - Girls on the Run or School Run Clubs1 Mile Fun Run - Onsite +7

From $5 Open

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Love Hard 5k Fun Run

Mon, Jun 1 · Denver, CO Denver

Virtual San Diego Love Hard 5kVirtual Love Hard 5kGrand Rapids Love Hard 5k +5

From $35 Open

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The Big Run Presented By Brooks

Wed, Jun 3 · Colorado Springs, CO Colorado Springs

Open

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Steamworks Half Marathon

Sat, Jun 6 · Durango, CO Durango

Road 1/2 Marathon

From $79 Open

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StepUp For Women And Recovery

Sat, Jun 6 · Fort Collins, CO Fort Collins

Road 5k Run/Walk - In-Person

From $40 Open

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2.2 for 22q Walk/Run/Ride 2026

Sat, Jun 6 · Anywhere, CO Anywhere

Virtual Virtual 2.2 for 22q 20262.2 for 22q Run/Walk/Ride (IN PERSON- ERIE, COLORADO)5k for 22q Run/Walk/Ride (IN PERSON- ERIE, COLORADO) +5

From $22 Open Closing Soon

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J-Town Jog 5K and Kids 1 Mile Dash

Sat, Jun 6 · Johnstown, CO Johnstown

Road Kids 1 Mile Dash5K Run/Walk

From $20 Open 100 spots left

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

Sat, Jun 6 · 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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Summits Trail Runs

Sat, Jun 6 · Granby, CO Granby

Trail 6-MileHalf MarathonMarathon +2

From $60 Open

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Creede Donkey Dash

Sat, Jun 6 · Creede, CO Creede

Creede Donkey Dash 3 MilerCreede Donkey Dash 10 Miler

From $70 Open

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The Valley Bottom Rio Trio

Sat, Jun 6 · Alamosa, CO Alamosa

Triathlon Kids RaceCo-Ed/Female Relay TeamTeen Relay Team +3

From $15 Open 30 spots left

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Pueblo Levee Fun Run Walk

Sat, Jun 6 · Pueblo, CO Pueblo

Road Pueblo Levee Fun Run Walk

From $25 Open

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Aiden's Adventure 5k

Sat, Jun 6 · Colorado Springs, CO Colorado Springs

Virtual Aiden's Adventure 5k Kids 1-Mile DashAiden's Adventure 5k Kids 1-Mile Dash - NO SHIRT/MEDALAiden's Adventure 5k Virtual Event +2

From $10 Open

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

Sat, Jun 6 · 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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Flamingo Day 5K

Sun, Jun 7 · Denver, CO Denver

Road 5KVirtual 5K

From $30 Open

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The Steamboat Marathon

Sun, Jun 7 · Steamboat Springs, CO Steamboat Springs

Road 10KHalf MarathonMarathon

From $70 Open

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Colorado 13er (Half Marathon/10k/5k)

Sun, Jun 7 · Louisville, CO Louisville

Road 5k10k13er

From $30 Open

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The Big Run Presented by Brooks

Sun, Jun 7 · Denver, CO Denver

Road The Big Run 5K presented by Brooks

From $40 Open

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RMRR June Trophy Series

Sun, Jun 7 · Denver, CO Denver

Road 4km

From $10 Open

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DU Dash Colorado

Sun, Jun 7 · Palmer Lake, CO Palmer Lake

Road 5K10KYouth Dash

From $30 Open

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BRR All-Comers Summer Track & Field Series #1

Thu, Jun 11 · Boulder, CO Boulder

Road 3000m100M200M +11

From $0 Open 15 spots left

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Howelsen Hill Trail Run

Sat, Jun 13 · Steamboat Springs, CO Steamboat Springs

Road 4 MileHowelsen 8 Mile

From $25.75 Open

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All-Out Summer Breeze

Sat, Jun 13 · Arvada, CO Arvada

Virtual 5KVIRTUAL 5K10K +3

From $25 Open

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Guardian Games

Sat, Jun 13 · Loveland, CO Loveland

MaleFemale

From $65 Open 60 spots left

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The Springs Downhill Mile

Sat, Jun 13 · Colorado Springs, CO Colorado Springs

Road The Springs Downhill Mile

From $15 Open

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Tutu Dash 5K

Sat, Jun 13 · Broomfield, CO Broomfield

Virtual Kids Run5K Run/WalkVirtual 5K

From $20 Open

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Stepping Stone 5K

Sat, Jun 13 · Littleton, CO Littleton

Virtual 2.5K Shortcut5K5K Virtual Run

From $30 Open

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Treat Trot - Denver

Sat, Jun 13 · Thornton, CO Thornton

Virtual 5K10K15K +4

From $17 Open Closing Soon

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Sam's Rainbow Run

Sat, Jun 13 · Fort Collins, CO Fort Collins

Virtual Virtual 5k5k Run/WalkSTUDENT 5K

From $25 Open

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San Juan Trail Tri

Sat, Jun 13 · Ridgway, CO Ridgway

Triathlon San Juan Trail Tri Team EntrySan Juan Trail Tri Individual Entry Ages 19+San Juan Trail Tri Youth Team Entry Ages 12-18 +1

From $55 Open

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Garden of the Gods 10 Mile/10K and Trail Run

Sun, Jun 14 · Colorado Springs, CO Colorado Springs

Trail 10 Mile10KTrail Run

From $60 Open

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Summer Kickoff Kids Duathlon 2026

Sun, Jun 14 · Colorado Springs, CO Colorado Springs

Triathlon Kids Duathlon

From $30 Open

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Garden of the Gods Little Horn and Big Horn Kids Races

Sun, Jun 14 · Colorado Springs, CO Colorado Springs

Open

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Treat Trot Colorado Springs

Sun, Jun 14 · Colorado Springs, CO Colorado Springs

Virtual 5K10K15K +4

From $17 Open Closing Soon

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The Bullfrog Splashdown

Sun, Jun 14 · Littleton, CO Littleton

Road 5K Run (Timed)Bullfrog Relay (Fun Team Event)10k Run (Timed)

From $30 Open Closing Soon

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HRCA Happy Hour Half K

Fri, Jun 19 · Littleton, CO Littleton

Road Half K

From $35 Open

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Run Juneteenth Day 5K/10K/13.1 DENVER/AURORA

Sat, Jun 20 · 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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Sloth Run 5K/10K/13.1 DENVER/AURORA

Sat, Jun 20 · Centennial, CO Centennial

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

From $30 Open

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