All races in Colorado
Upcoming half marathons in Colorado
8 half marathons are coming up in Colorado, out of 176 races on the statewide calendar. Compare dates, distances and locations, then get ready with a personalized training plan.
8 upcoming races
October 2026
- Oct 10, 2026Breckenridge Road Marathon📍 Breckenridge, CO26.2 mi · 13.1 mi · 6.2 mi · 3.1 mi
November 2026
- Nov 1, 2026Rim Rock Marathon📍 Grand Junction, CO26.2 mi · 13.1 mi
April 2027
- Apr 24, 2027All-Out Beat the Heat 1M, 5K, 10K, Half Marathon & Marathon📍 Westminster, CO3.1 mi · 6.2 mi · 13.1 mi
May 2027
- May 2, 2027Colorado Marathon📍 Colorado Springs, CO26.2 mi · 13.1 mi · 6.2 mi · 3.1 mi
- May 15, 2027Denver Marathon📍 Denver, CO26.2 mi · 26.2 mi · 13.1 mi · 6.2 mi
June 2027
- Jun 12, 2027Barr Lake Trail Race📍 Brighton, CO31.1 mi · 18.6 mi · 13.1 mi · 9.3 mi
- Jun 26, 2027Slacker Race📍 Denver, CO13.1 mi · 13.1 mi
July 2027
- Jul 17, 2027Aspen Valley Marathon📍 Aspen, CO26.2 mi · 13.1 mi · 3.1 mi
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