All races in Colorado
Upcoming half marathons in Colorado
21 half marathons are coming up in Colorado, out of 387 races on the statewide calendar. Compare dates, distances and locations, then get ready with a personalized training plan.
21 upcoming races
April 2027
- Apr 24, 2027 All-Out Beat the Heat 1M, 5K, 10K, Half Marathon & Marathon📍 Westminster, CO3.1 mi · 6.2 mi · 13.1 mi
May 2027
- May 2, 2027 Colorado Marathon📍 Colorado Springs, CO26.2 mi · 13.1 mi · 6.2 mi · 3.1 mi
- May 8, 2027 estimated dateCarbon Valley Half Marathon📍 Firestone, CO13.1 mi · 3.1 mi
- May 15, 2027 Denver Marathon📍 Denver, CO26.2 mi · 26.2 mi · 13.1 mi · 6.2 mi
- May 22, 2027 estimated dateMemorial Day Run 5K/10K/13.1 Denver/Aurora📍 Aurora, CO1 mi · 3.1 mi · 6.2 mi · 13.1 mi
June 2027
- Jun 6, 2027 estimated dateSteamboat Marathon, Half Marathon and 10K📍 Steamboat Springs, CO26.2 mi · 13.1 mi · 6.2 mi
- Jun 6, 2027 estimated dateSteamboat Marathon📍 Steamboat Springs, CO26.2 mi · 13.1 mi · 6.2 mi
- Jun 12, 2027 Barr Lake Trail Race📍 Brighton, CO31.1 mi · 18.6 mi · 13.1 mi · 9.3 mi
- Jun 26, 2027 Slacker Race📍 Denver, CO13.1 mi · 13.1 mi
July 2027
- Jul 17, 2027 Aspen Valley Marathon📍 Aspen, CO26.2 mi · 13.1 mi · 3.1 mi
August 2027
- Aug 7, 2027 estimated dateFort Collins Human Race📍 Fort Collins, CO13.1 mi · 6.2 mi · 3.1 mi
- Aug 7, 2027 estimated dateGeorgetown to Idaho Springs Half Marathon📍 Idaho Springs, CO13.1 mi
- Aug 8, 2027 estimated dateLeadville Boomdays International Pack Burro Race📍 Leadville, CO21 mi · 8 mi
- Aug 15, 2027 estimated dateBoulder Rez Marathon📍 Boulder, CO26.2 mi · 18.6 mi · 13.1 mi · 6.2 mi
- Aug 15, 2027 estimated dateMt. Sneffels Marathon/Half📍 Ridgway, CO13.1 mi · 6.2 mi
September 2027
- Sep 5, 2027 estimated dateGolden Harvest Half Marathon & 5k/10k - Colorado Springs📍 Colorado Springs, CO50 m · 1 mi · 3.1 mi · 6.2 mi
- Sep 18, 2027 estimated dateRun The Rockies📍 Copper Mountain, CO13.1 mi · 6.2 mi
- Sep 19, 2027 estimated dateFall Equinox📍 Fort Collins, CO13.1 mi · 5 mi
- Sep 26, 2027 estimated dateBoulderthon Boulder Marathon📍 Boulder, CO26.2 mi · 13.1 mi · 6.2 mi · 3.1 mi
October 2027
- Oct 9, 2027 estimated dateBreckenridge Road Marathon📍 Breckenridge, CO26.2 mi · 13.1 mi · 6.2 mi · 3.1 mi
- Oct 31, 2027 estimated dateRim Rock Marathon📍 Grand Junction, CO26.2 mi · 13.1 mi
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