Half Marathons in Colorado — 2026

There are 19 half marathons in Colorado scheduled for 2026. The next is the Three Creeks Half Marathon in Englewood on April 5. Colorado half marathons run primarily April through February.

Three Creeks Half Marathon

Sun, Apr 5 · Englewood, CO Englewood

Three Creeks Half MarathonThree Creeks Half Marathon Relay

From $65 Open Closing Soon

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Prairie Dog Run Series

Sun, Apr 12 · Louisville, CO Louisville

Half Marathon PACKAGE of 3 events

From $900 Closed

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Sky Rim Duathlon

Sat, Apr 18 · Durango, CO Durango

Sky Rim Duathlon

From $45 Open

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Horsetooth Half Marathon - Presented by Fort Collins Connexion

Sun, Apr 19 · Fort Collins, CO Fort Collins

Half Marathon

From $75 Open

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Runs With Scissors Races

Sat, Apr 25 · Brighton, CO Brighton

Half MarathonMarathon50K Ultra Marathon +3

From $35 Open Closing Soon 30 spots left

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Vallecito Lake Heavy Half

Sat, May 16 · Bayfield, CO Bayfield

Vallecito Lake Heavy Half Marathon

From $75 Open

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Girls on the Run Rockies Colfax SoleMates 2026

Sun, May 17 · Denver, CO Denver

Colfax 1/2 MarathonColfax MarathonColfax Relay Team

From $25 Open 3 spots left

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Steamworks Half Marathon

Sat, Jun 6 · Durango, CO Durango

1/2 Marathon

From $79 Open

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

Sun, Jun 28 · Idaho Springs, CO Idaho Springs

AscentRound-Trip

From $125 Open Closing Soon 75 spots left

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Barr Trail Mountain Race

Sun, Jul 19 · Manitou Springs, CO Manitou Springs

Aid Station Challenge SponsorBTMR

From $75 Open 16 spots left

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Bound for Boston Marathon & Half Marathon - Denver

Sun, Aug 2 · Denver, CO Denver

Half MarathonVirtual Half MarathonMarathon +1

From $25 Open

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Staunton Rocks! Marathon and Half Marathon

Sat, Aug 22 · Pine, CO Pine

Staunton Rocks! Half MarathonStaunton Rocks! Marathon

From $90 Open

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TBK Bank Thirsty 13 Half Marathon

Sat, Aug 29 · Durango, CO Durango

Just The Race -- No Brewfest TicketRace Plus Brewfest

From $85 Open

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Black Squirrel Half Marathon

Sat, Sep 12 · Bellvue, CO Bellvue

Black Squirrel Half Marathon

From $90 Open

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Pikes Peak Ascent

Sat, Sep 19 · Manitou Springs, CO Manitou Springs

AscentHalf Priced Award Entry

From $87.5 Open

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CG Adventure Club - Elevation Everest

Wed, Sep 23 · Winter Park, CO Winter Park

Basic Experience PackageAll-In Adventure PackageStarter Adventure Package

From $150 Open

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Durango Marathon

Sun, Oct 11 · Durango, CO Durango

Durango Half MarathonDurango MarathonDurango Marathon Weekend 5k

From $20 Open

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50 States Half Marathon Club General Membership

Fri, Feb 10 · Colorado Springs, CO Colorado Springs

50 States Half Marathon Club General Membership

From $85 Open

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Fifty States Half Marathon Club Life Membership

Sat, Feb 11 · Colorado Springs, CO Colorado Springs

Fifty States Half Marathon Club Life Membership

From $429 Open

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