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.
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Filter Colorado Half Marathons
Race Size
Difficulty
Scenery
Type
Perfect For
Distances
Filter Colorado Half Marathons
Race Size
Difficulty
Scenery
Type
Perfect For
Distances
January 9, 2027
100-500 runners
[get_race_listing_state_city post_id="91846"]
- 10K, 5k, Half Marathon, Trail & Road
June 28, 2026
100-500 runners
[get_race_listing_state_city post_id="150533"]
- 10K, Half Marathon, Marathon, Trail & Road
August 15, 2026
100-500 runners
[get_race_listing_state_city post_id="123119"]
- 10K, 5k, Half Marathon, Trail
December 6, 2026
100-500 runners
[get_race_listing_state_city post_id="122918"]
- Half Marathon, Trail
April 24, 2027
1-100 runners
[get_race_listing_state_city post_id="123118"]
- 10K, 5k, Half Marathon, Marathon, Trail & Road
June 6, 2026
100-500 runners
[get_race_listing_state_city post_id="90986"]
- 10K, 5k, Half Marathon, Road
May 2, 2027
500-1000 runners
[get_race_listing_state_city post_id="122654"]
- 10K, 5k, Half Marathon, Marathon, Road
May 16, 2027
1,000-10,000 runners
[get_race_listing_state_city post_id="122615"]
- Half Marathon, Marathon, Road
May 8, 2027
1-100 runners
[get_race_listing_state_city post_id="122578"]
- Half Marathon, Trail
May 30, 2027
1-100 runners
[get_race_listing_state_city post_id="122523"]
- Half Marathon, Marathon, Trail
August 8, 2026
100-500 runners
[get_race_listing_state_city post_id="150568"]
- 10K, 5k, Half Marathon, Road
August 8, 2026
100-500 runners
[get_race_listing_state_city post_id="122650"]
- 10K, 5k, Half Marathon, Road
October 3, 2026
1-100 runners
[get_race_listing_state_city post_id="122532"]
- Half Marathon, Trail
March 21, 2027
1-100 runners
[get_race_listing_state_city post_id="103720"]
- 10K, 5k, Half Marathon, Road
March 21, 2027
1-100 runners
[get_race_listing_state_city post_id="122692"]
- 10K, 5k, Half Marathon, Trail
March 21, 2027
1-100 runners
[get_race_listing_state_city post_id="122690"]
- 10K, 5k, Half Marathon, Road
April 11, 2027
500-1000 runners
[get_race_listing_state_city post_id="122764"]
- Half Marathon, Trail
April 11, 2027
100-500 runners
[get_race_listing_state_city post_id="122677"]
- 10K, Half Marathon, Trail
August 8, 2026
500-1000 runners
[get_race_listing_state_city post_id="122686"]
- Half Marathon, Road
July 5, 2026
100-500 runners
[get_race_listing_state_city post_id="150519"]
- 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?
