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.

Treat Trot Colorado Springs

Sun, Jun 14 · Colorado Springs, CO Colorado Springs

Virtual 5K10K15K +4

From $17 Open

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HRCA Happy Hour Half K

Fri, Jun 19 · Littleton, CO Littleton

Road Half K

From $35 Open Closing Soon

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Sierra's 5K Run/Walk Race Against Meningitis

Sat, Jun 20 · Loveland, CO Loveland

Road 5K RunKids Fun Run (10 & Under)

From $10 Open

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Fatherhood 5k Family Run/Walk

Sat, Jun 20 · Colorado Springs, CO Colorado Springs

Road Youth 8-18 yrsFamily Pricing (Immediate Family)Adult 5k

From $15 Open Closing Soon

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2026 Doggie Dash

Sat, Jun 20 · Colorado Springs, CO Colorado Springs

Road 2026 Doggie Dash 5K

From $25 Open

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Mustang Mile 2026

Sat, Jun 20 · Kremmling, CO Kremmling

Road Senior Joe- For the 65+ crowdLittle Joe- For the kids!Speedy Joe- For the most fierce competitors +1

From $10 Open

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Run for the River 5k Boulder

Sat, Jun 20 · Boulder, CO Boulder

Run for the River 5k Boulder

From $25 Open

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Unicorn 5k (North)

Sat, Jun 20 · Thornton, CO Thornton

Road 1/2 (ish) Mile Saunter - untimed5k Run/Walk

From $16 Open Closing Soon

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FCRC Marathon Training Program

Sat, Jun 20 · Fort Collins, CO Fort Collins

Road FCRC 2026 Marathon Training Program

From $20 Open

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Red, White and Brew 5k, 10k & Half Marathon

Sat, Jun 20 · Windsor, CO Windsor

Road 1 Mile Fun Run5k run or walk5k Ruck +3

From $15 Open

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Parker Parks and Recreation Dash Across the Dam Father’s Day 5K

Sat, Jun 20 · Parker, CO Parker

Road 5K

From $40 Open Closing Soon

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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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Freedom Tour Classic

Sat, Jun 20 · Fort Collins, CO Fort Collins

5K Walk15 Mile25 Mile w/Jersey +3

From $25 Open

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Havoc at HartFit OCR 3k

Sat, Jun 20 · Peyton, CO Peyton

OCR KIDS HartFit HAVOC 1 MileHavoc at HartFit OCR 3k

From $29.99 Open 10 spots left

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

From $30 Open

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14th Annual Buffs4Life Kyle MacIntosh Memorial 5K Run/Walk

Sun, Jun 21 · Boulder, CO Boulder

Road In-Person 5K Run/Walk

From $30 Open

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Father's Day Classic 10k, 5k, & 1 Mile

Sun, Jun 21 · Arvada, CO Arvada

Road 1 Mile Fun Run (untimed)Manly Mile (TIMED - for MEN Only)5K & Manly Mile (Men Only) +3

From $8 Open Closing Soon

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VIRTUAL 14th Annual Buffs4Life Kyle MacIntosh Memorial 5K Run/Walk

Sun, Jun 21 · Boulder, CO Boulder

Road Virtual 5K Run/Walk

From $30 Open

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Sunset Trail Running Festival

Sun, Jun 21 · Boulder, CO Boulder

Trail Kids 1K5K12K +1

From $15 Open

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Juneteenth Fun Run 5K

Sun, Jun 21 · Denver, CO Denver

Road Kids 5K5K

From $25 Open

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The Red Schoolhouse Run

Tue, Jun 23 · Louisville, CO Louisville

Road The Red Schoolhouse Run

From $30 Open

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Stitch, Sip, & Support

Wed, Jun 24 · Aurora, CO Aurora

Stitch, Sip, & Support - Girls on the Run

From $46.23 Open 40 spots left

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BRR All-Comers Summer Track & Field Series #2

Thu, Jun 25 · Boulder, CO Boulder

Road Steeplechase (3000 + 2000)100m200m +11

From $20 Open 15 spots left

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Race in the Clouds - Alma Dirt Festival 2026

Thu, Jun 25 · Alma, CO Alma

Trail Highschool/Middle School Short Course (6.1miles)Trail 10KHighschool/Middle School Long Course (13 miles) +8

From $0 Open Closing Soon

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The Four Legged 5k

Fri, Jun 26 · Bailey, CO Bailey

Road Four Legged 5k - Adult (13 & Up)Four Legged 5k - Youth (12 & Under)

From $10 Open

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The Sunlight Showdown

Sat, Jun 27 · Glenwood Springs, CO Glenwood Springs

Trail 5k Trail Run10k Trail Run1/2 Marathon Trail Run

From $35 Open Closing Soon

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Pearl Street Mile

Sat, Jun 27 · Boulder, CO Boulder

Road Pearl Street MileKids 800m

From $15 Open

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Loveland Lake to Lake Triathlon

Sat, Jun 27 · Loveland, CO Loveland

Triathlon SUP - SprintRelay - OlympicRelay - Sprint +5

From $110 Open

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SBT TRL

Sat, Jun 27 · Steamboat Springs, CO Steamboat Springs

Road 5k10k

From $35.75 Open

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Before The Fourth 5k

Sat, Jun 27 · Littleton, CO Littleton

Road Before The Fourth 5k

From $35 Open Closing Soon

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Denver Pride 5K

Sat, Jun 27 · Denver, CO Denver

Road Denver Pride 5K

From $40 Open

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Fitness Expo On Tap at the Colorado Tap House

Sat, Jun 27 · Arvada, CO Arvada

Road Beer Relay - Team of Two (only One Team Member Needs to Sign Up and Pay)Beer Mile - Individual ParticipantI want the Event Shirt! +1

From $0 Open 20 spots left

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Slacker Half Marathon-Relay-4-Mile Races

Sat, Jun 27 · Georgetown, CO Georgetown

Virtual Virtual 4 Mile4 Mile - Military Veteran4-Mile +4

From $35 Open Closing Soon

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Trail Town Races

Sat, Jun 27 · Ridgway, CO Ridgway

Road The 5-Mile Run/WalkThe 10-Mile Run

From $25 Open

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Blue Sky Ascent & Round Trip (formerly the Mt. Evans Ascent)

Sun, Jun 28 · Idaho Springs, CO Idaho Springs

Road AscentRound-Trip

From $125 Open Closing Soon 75 spots left

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Cade’s Cause: Concussion & CTE Awareness Run/Walk

Sun, Jun 28 · Littleton, CO Littleton

Road Run/Walk Kids (5-12)Run/Walk Adult

From $10 Open

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Tunnel to Towers National Golf Series Northern Colorado Golf Classic

Mon, Jun 29 · Windsor, CO Windsor

Lunch OnlySponsorship: Title SponsorSponsorship: Veterans Sponsor +11

From $40 Open 1 spots left

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Miles for Hope

Wed, Jul 1 · Canon City, CO Canon City

Open

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Durango Brewer's Trail Series

Thu, Jul 2 · Durango, CO Durango

Trail Anarchy Brewing - Benefiting ...High Trestle Finale - Benefiting The HiveSka Brewing - Benefiting the La Plata County Humane Society +1

From $30 Open Closing Soon

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2026 Crested Butte Golden Retriever Registration July 4 Parade

Sat, Jul 4 · Crested Butte, CO Crested Butte

Open

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FireKracker 5k

Sat, Jul 4 · Fort Collins, CO Fort Collins

Road Kids 1-MileFireKracker 5kElite 5k

From $5 Open Closing Soon

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Pueblo's Firecracker 5k!

Sat, Jul 4 · Pueblo, CO Pueblo

Road Pueblo's Firecracker 5k!

From $19 Open

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Burro Buster 5k

Sat, Jul 4 · Fairplay, CO Fairplay

Road 5k

From $35 Open

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4th of July Donut Hole Mile

Sat, Jul 4 · Arvada, CO Arvada

Road Donut Hole Mile

From $6 Open 80 spots left

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Independence Day Freedom 5K

Sat, Jul 4 · Buena Vista, CO Buena Vista

Road 3K5K

From $25 Open

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July 4th Run 5K/10K/13.1 DENVER/AURORA

Sat, Jul 4 · 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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Avery Brewing Co. 4K on the 4th

Sat, Jul 4 · Boulder, CO Boulder

Road Avery Brewing Co. 4K on the 4th

From $40 Open

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Red Feather Lakes 3.6 Mile Fun Run

Sat, Jul 4 · Red Feather Lakes, CO Red Feather Lakes

Road Red Feather Lakes 3.6 Mile Fun Run

From $40 Open

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Rendezvous Run for Independence

Sat, Jul 4 · Winter Park, CO Winter Park

Road Rendezvous Run for Independence 5K Run/Walk

From $40 Open

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Palmer Lake July 4th Fun Run

Sat, Jul 4 · Palmer Lake, CO Palmer Lake

Virtual July 4 Fun Run - VIRTUAL RACE - AdultJuly 4 Fun Run - Elementary Student and YoungerJuly 4 Fun Run - Adult +3

From $20 Open Closing Soon

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