Half Marathons in Colorado 2026 | Upcoming Races & Dates | My Next Race

There are 15 half marathons in Colorado scheduled for 2026. The next is the Blue Sky Ascent & Round Trip (formerly the Mt. Evans Ascent) in Idaho Springs on June 28. Colorado half marathons run primarily June through February.

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

Surf and Turf Triathlon

Sun, Jul 12 · Aurora, CO Aurora

Surf and Turf Super Sprint TriathlonSurf and Turf Sprint Triathlon

From $75 Open

Barr Trail Mountain Race

Sun, Jul 19 · Manitou Springs, CO Manitou Springs

BTMRAid Station Challenge Sponsor

From $75 Open 16 spots left

World Championship Pack Burro Race

Sun, Jul 26 · Fairplay, CO Fairplay

Short Course, approximately 12.3 milesLong Course, 29+ miles

From $70 Open

Bound for Boston Marathon & Half Marathon - Denver

Sun, Aug 2 · Denver, CO Denver

Half MarathonVirtual Half MarathonMarathon +1

From $25 Open

Staunton Rocks! Marathon and Half Marathon

Sat, Aug 22 · Pine, CO Pine

Staunton Rocks! Half MarathonStaunton Rocks! Marathon

From $90 Open

TBK Bank Thirsty 13 Half Marathon

Sat, Aug 29 · Durango, CO Durango

Just The Race -- No Brewfest TicketRace Plus Brewfest

From $85 Open

Black Squirrel Half Marathon

Sat, Sep 12 · Bellvue, CO Bellvue

Black Squirrel Half Marathon

From $90 Open

RMRR Fall Marathon Training Series #2

Sun, Sep 13 · Thornton, CO Thornton

RMRR Fall Marathon Training Series #2 - 20kmRMRR Fall Marathon Training Series #2 - 30km

From $20 Closed

Pikes Peak Ascent

Sat, Sep 19 · Manitou Springs, CO Manitou Springs

Half Priced Award EntryAscent

From $87.5 Open

CG Adventure Club - Elevation Everest

Wed, Sep 23 · Winter Park, CO Winter Park

Basic Experience PackageAll-In Adventure PackageStarter Adventure Package

From $150 Open

Durango Marathon

Sun, Oct 11 · Durango, CO Durango

Durango Half MarathonDurango MarathonDurango Marathon Weekend 5k

From $20 Open

ALMAGEDDON Winter Triathlon presented by the Alma Foundation

Sat, Jan 16 · Alma, CO Alma

ALMAGEDDON Winter Triathlon

From $40 Open 75 spots left

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

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