Running Races in Colorado — 2026

There are 422 running races in Colorado in 2026 across 109 cities. The next upcoming race is the Middle School San Juan Basin League Meet in Ridgway on April 24. Popular distances include 5K races, trail runs, half marathons.

CEROX IRON + IRON X

Sat, May 9 · Frederick, CO Frederick

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

From $45 Open

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Run For The Trees - 2 Mile Fun Run

Sat, May 9 · Loveland, CO Loveland

Virtual Run For The Trees Fun RunVirtual Run for the Trees Fun Run

From $20 Open

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Springs Splash & Dash

Sat, May 9 · Colorado Springs, CO Colorado Springs

Triathlon Springs Splash & Dash 2026

From $20 Open

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Cherry Creek Race for the Watershed 2026

Sat, May 9 · Aurora, CO Aurora

Road 5k Walk and Fun Run

From $31.38 Open

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Quad Rock 25 & 50 Mile Trail Races

Sat, May 9 · Bellvue, CO Bellvue

Trail Quad Rock 25Quad Rock 50

From $125 Open Closing Soon

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Colorado Women's Classic - Westminster

Sun, May 10 · Westminster, CO Westminster

Road 5k10k10 Miler

From $35 Open Closing Soon

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Denver Mother's Day 5K

Sun, May 10 · Denver, CO Denver

Road 5K

From $25.99 Open Closing Soon

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Hometown Half Marathon & 5k/10k - Denver

Sun, May 10 · Littleton, CO Littleton

Virtual 1 Mile5K10K +4

From $17 Open 5 spots left

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Super Mom 5K/10K/Half - Colorado Springs

Sun, May 10 · Colorado Springs, CO Colorado Springs

Virtual 5K-No ShirtVirtual 5K5K +6

From $30 Open Closing Soon 6 spots left

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Endure Trail Runs

Sat, May 16 · Divide, CO Divide

Trail 10kHalf MarathonMarathon +2

From $60 Open

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Gluten Free Gallop 5K

Sat, May 16 · Littleton, CO Littleton

Road ROCK Fun Run2026 Gluten Free Gallop 5K

From $15 Open

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The HIKE

Sat, May 16 · Cascade, CO Cascade

Virtual Walk, Run, or Hike Against Trauma

From $25 Open

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Vallecito Lake Heavy Half

Sat, May 16 · Bayfield, CO Bayfield

Road Vallecito Lake Heavy Half Marathon

From $75 Open Closing Soon

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Black Canyon Ascent

Sat, May 16 · Montrose, CO Montrose

Road The 6-Mile Ascent (Run)The 6-Mile Ascent (Challenge Walk)

From $55 Open

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Girls on the Run 5K at Colfax - Running Buddies and Volunteers

Sat, May 16 · Denver, CO Denver

Road Running Buddy

From $25 Open

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Spirit Challenge Run for Autism 10k and 5k

Sat, May 16 · Steamboat Springs, CO Steamboat Springs

Road 5k10k

From $25.75 Open

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Growing Home - Colfax Fundraiser

Sat, May 16 · Denver, CO Denver

2026 Colfax Run Fundraiser for Growing Home (5k, 10 Miler, Relay, Half or Full Marathon)

From $0 Open

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Girls on the Run Rockies Colfax SoleMates 2026

Sun, May 17 · Denver, CO Denver

Road Colfax 1/2 MarathonColfax MarathonColfax Relay Team

From $25 Open 3 spots left

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Healing Warriors Program 2026 Annual 5K Fun Run

Sun, May 17 · Fort Collins, CO Fort Collins

Healing Warriors Program 2026 Annual 5K Fun Run

From $40 Open

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Miles for Smiles 5K

Sun, May 17 · Arvada, CO Arvada

Virtual Miles for Smiles 5K - Virtual RaceMiles for Smiles 5KJordyn's Adaptive Dash - open to children who have received adaptive equipment from Two Angels Foundation

From $0 Open

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Canine On the Creek

Sun, May 17 · Dumont, CO Dumont

Road 1 Mile Fun Run/Walk5K Fun Run/Walk

From $25 Open

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AdventHealth Race to Rebuild

Wed, May 20 · Lone Tree, CO Lone Tree

Road Race to Rebuild

From $0 Open

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Run Wild! Rabies Free Africa 5K

Fri, May 22 · Virtual, CO Virtual

Virtual Run Wild! Rabies Free Africa 5K

From $45 Open

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8th Annual Angel Run at Red Leg Brewing

Fri, May 22 · Colorado Springs, CO Colorado Springs

Virtual 5k Angel Run at Red Leg Brewing, Timed5k Angel Run at Red Leg Brewing, Not TimedVirtual Angel Run 5k +3

From $35 Open

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Farish Trail Race

Sat, May 23 · Woodland Park, CO Woodland Park

Trail Kids Run5K10K +1

From $0 Open

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GMR Backyard Ultra

Sat, May 23 · Golden, CO Golden

Road GMR Backyard Ultra

From $50 Open

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Mile High Mile

Sat, May 23 · Boulder, CO Boulder

Road Elite OpenWheelchair RaceOpen Competitive Waves +4

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

From $30 Open

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Run for Mental Health 5K/10K/13.1 DENVER/AURORA

Sat, May 23 · 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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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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2026 CKF Cape Town Marathon

Sun, May 24 · Aspen, CO Aspen

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)Kayak Slalom - Rich Weiss ParkKayak Rodeo - Charlie’s Hole +11

From $0 Open Closing Soon 50 spots left

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DRMABPsi 1–5K Walk, Run & Roll

Sat, May 30 · Denver, CO Denver

Road 1kKids Run2k +3

From $10 Open

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Trinidad Wellness Festival 5K

Sat, May 30 · Trinidad, CO Trinidad

Road Standard Registration

From $25 Open

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M1LE Nation Challenge

Sat, May 30 · Anywhere, CO Anywhere

Virtual M1LE Nation- LIVE RaceM1LE Nation- Virtual RaceTeam M1LE Nation- LIVE Race +1

From $10 Open

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Dash4Hope 2026

Sat, May 30 · Greeley, CO Greeley

Road Dash4Hope 2026

From $15 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 Closing Soon

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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 Denver Love Hard 5kLondon Love Hard 5kVirtual 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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Berthoud Day 5K

Sat, Jun 6 · Berthoud, CO Berthoud

Road 5K

From $30 Open Closing Soon

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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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The Valley Bottom Rio Trio

Sat, Jun 6 · Alamosa, CO Alamosa

Triathlon Kids RaceSolo MaleSolo Female +3

From $15 Open 30 spots left

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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 Closing Soon

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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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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 Closing Soon 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 Run5K RegistrationVirtual Run Registration +3

From $30 Open

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Steamworks Half Marathon

Sat, Jun 6 · Durango, CO Durango

Road 1/2 Marathon

From $79 Open Closing Soon

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