You can run Colorado half-marathon events in Arvada, Aspen, Bayfield, Beulah, Boulder, Breckenridge, Brighton, Buena Vista, Canon City, Castle Rock, Centennial, Cheyenne, Colorado Springs, Denver, Divide, Durango, Erie, Estes Park, Firestone, Four Corners Monument, Frisco, Fruita, Georgetown, Golden, Granby, Grand Junction, Highlands Ranch, Lakewood, Longmont, Louisville, Nederland, Ouray, Parker, Pending, Pine, Provo, Pueblo, Red Feather Lakes, Salt Lake City, Steamboat Springs, Telluride, Trinidad, Westminster, and Windsor.
[race_calendar_title]
August 8, 2026
100-500 runners
[get_race_listing_state_city post_id="122469"]
- 10K, 5k, Half Marathon, Road
August 2, 2026
100-500 runners
[get_race_listing_state_city post_id="150563"]
- Half Marathon, Marathon, Road
August 25, 2026
1-100 runners
[get_race_listing_state_city post_id="153511"]
- 10K, 5k, Half Marathon, Trail
September 12, 2026
1-100 runners
[get_race_listing_state_city post_id="122694"]
- Half Marathon, Trail
October 31, 2026
1-100 runners
[get_race_listing_state_city post_id="122581"]
- 10K, 5k, Half Marathon, Road
October 4, 2026
100-500 runners
[get_race_listing_state_city post_id="123124"]
- 10K, 5k, Half Marathon, Marathon, Road
October 11, 2026
100-500 runners
[get_race_listing_state_city post_id="123115"]
- 5k, Half Marathon, Road
November 1, 2026
1-100 runners
[get_race_listing_state_city post_id="122691"]
- 10K, 5k, Half Marathon, Road
November 9, 2026
1-100 runners
[get_race_listing_state_city post_id="122620"]
- 5k, Half Marathon, Marathon, Road
November 7, 2026
500-1000 runners
[get_race_listing_state_city post_id="122706"]
- Half Marathon, Trail
November 21, 2026
100-500 runners
[get_race_listing_state_city post_id="150605"]
- 10K, 5k, Half Marathon, Trail & Road
March 29, 2026
100-500 runners
[get_race_listing_state_city post_id="122652"]
- Half Marathon, Road
April 5, 2026
100-500 runners
[get_race_listing_state_city post_id="122616"]
- Half Marathon, Trail
June 13, 2026
1-100 runners
[get_race_listing_state_city post_id="150237"]
- 5k, Half Marathon, Trail
July 27, 2026
100-500 runners
[get_race_listing_state_city post_id="153612"]
- Trail, Ultramarathon
August 9, 2026
100-500 runners
[get_race_listing_state_city post_id="123064"]
- Half Marathon, Marathon, Trail
September 26, 2026
100-500 runners
[get_race_listing_state_city post_id="122921"]
- Half Marathon, Trail, Ultramarathon
September 26, 2026
1-100 runners
[get_race_listing_state_city post_id="123086"]
- Half Marathon, Trail
September 12, 2026
100-500 runners
[get_race_listing_state_city post_id="122864"]
- 10K, 5k, Half Marathon, Trail
September 13, 2026
1-100 runners
[get_race_listing_state_city post_id="122549"]
- 5k, Half Marathon, Road
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Running in Colorado
FAQ
What are the most popular Colorado half marathons?
The four most popular Colorado half marathons are the Denver Colfax Half Marathon, the REVEL Rockies Half Marathon, the Horsetooth Half Marathon, and Boulderthon.
What’s the best half marathons in Colorado for beginners in 2026?
We have three picks for the best beginner Colorado half marathons. The first is the Slacker Half Marathon for it’s fun fast downhill course. Secondly, Boulderthon, for it’s scenic course, huge crowds, and amazing production quality. And finally, the Denver Colfax Half Marathon for it’s notable and exciting course and race experience.
Which Colorado cities have half marathons?
