angle-leftangle-rightarrow-circle-leftarrow-circle-rightbarschevron-circle-leftchevron-circle-rightchevron-leftchevron-rightcomment-bubbleenvelopefacebook-squarefacebookgithub-altgithub-squaregoogle-plus-squaregoogle-plusinstagramlinkedin-squarelinkedinpinterest-ppinterest-squarerss-squarersssearchtimes-circle-otwitter-squaretwitteryoutube-squareyoutube
Skip to content
RaceRaves
  • Sign In
  • Join Now
  • Find a Race
  • Races by State
  • Race Calendar
  • Blog
  • Partner
  • Find a Race
  • Races by State
  • Race Calendar
  • Blog
  • Partner
  • Join Now
  • Sign In

Half Marathons in Colorado

  1. Races by State
  2. Colorado
  3. Half Marathon

Browse Half Marathon races in Colorado, including upcoming races and races up to one year past their event date. Sort by highest rating or number of reviews to elevate the most popular races.

For each Half Marathon race, you’ll find key details, finisher ratings and reviews, photos, videos, related articles, race-day weather data and a link to register.

loading indicator Loading results Resetting search …

Showing Half Marathons in Colorado

Denver Colfax Marathon
Denver, CO | May 17–18, 2025

OVERALL

(27 ratings)

3.9
ENDURE Trail Runs
Divide, CO | May 17, 2025

OVERALL

(0 ratings)

0
Ram Party Trail Runs
Colorado Springs, CO | May 17, 2025

OVERALL

(0 ratings)

0
Samson’s Revenge
Estes Park, CO | May 17, 2025

OVERALL

(0 ratings)

0
Vallecito Lake Heavy Half
Bayfield, CO | May 17, 2025

OVERALL

(0 ratings)

0
Spirit Trail Race
Buena Vista, CO | May 25, 2025

OVERALL

(0 ratings)

0
Basalt Half Marathon
Basalt, CO | May 31, 2025

OVERALL

(1 rating)

5
Colorado 13er
Louisville, CO | Jun 1, 2025

OVERALL

(1 rating)

5
Steamboat Marathon, Half Marathon & 10K
Steamboat Springs, CO | Jun 1, 2025

OVERALL

(7 ratings)

4.4
All-Out Summer Breeze Half Marathon
Arvada, CO | Jun 7, 2025

OVERALL

(0 ratings)

0
Great Divide Ultra
Divide, CO | Jun 7–8, 2025

OVERALL

(0 ratings)

0
Steamworks Half Marathon
Durango, CO | Jun 7, 2025

OVERALL

(0 ratings)

0
Breckenridge Brewery Half Marathon & 5K
Littleton, CO | Jun 8, 2025

OVERALL

(1 rating)

5
Barr Lake Trail Race
Brighton, CO | Jun 14, 2025

OVERALL

(0 ratings)

0
Estes Park Marathon
Estes Park, CO | Jun 14–15, 2025

OVERALL

(3 ratings)

4
IRONMAN 70.3 Boulder
Boulder, CO | Jun 14, 2025

OVERALL

(3 ratings)

4.3
Hometown Half Marathon Denver
Westminster, CO | Jun 21, 2025

OVERALL

(0 ratings)

0
Red, White and Brew Race (CO)
Windsor, CO | Jun 21, 2025

OVERALL

(0 ratings)

0
Ring the Springs
Colorado Springs, CO | Jun 21, 2025

OVERALL

(0 ratings)

0
Hometown Half Marathon Colorado Springs
Colorado Springs, CO | Jun 22, 2025

OVERALL

(0 ratings)

0

Browse by Race Distance

Browse By City

  • Colorado Springs
  • Denver
  • Durango
  • Fort Collins
  • Grand Junction
  • Leadville
  • Steamboat Springs
  • ABOUT
  • CONTACT
  • SUBMIT RACE
  • LUNATIC CENTRAL
  • FAQs
  • SITEMAP
  • TERMS
  • PRIVACY

© 2025 RaceRaves, LLC. RaceRaves® is a registered trademark of RaceRaves, LLC. All rights reserved.