Colorado Marathons
23 upcoming marathons across Colorado, updated nightly. Want radius search and maps? Open these in the Race Finder.
July 2026
- Sat 7/25Aspen Valley MarathonAspen, CO 路 Marathon 路 Half Marathon 路 5K
- Sat 7/25Bob Cook Memorial Blue Sky Hill ClimbIdaho Springs, CO 路 Marathon
August 2026
- Sat 8/1Aspen BackcountryAspen, CO 路 50K 路 Marathon 路 Half Marathon
- Sun 8/2Bound for Boston Marathon & Half Marathon - DenverDenver, CO 路 Marathon 路 Half Marathon
- Sat 8/22Staunton Rocks! Marathon and Half MarathonPine, CO 路 Marathon 路 Half Marathon
September 2026
- Sat 9/5Denver, CO Galloway Training ProgramDenver, CO 路 Marathon 路 Half Marathon
- Sat 9/12Steele Trap Trail RunLoma, CO 路 Marathon
- Sun 9/20Pikes Peak MarathonManitou Springs, CO 路 Marathon
- Sun 9/27Team CKF Running SeriesAspen, CO 路 Marathon
October 2026
- Sat 10/3Colorado Springs Marathon, Half, 5K, and Kids KColorado Springs, CO 路 Marathon 路 Half Marathon 路 5K 路 Other
- Sat 10/3West Elk ChallengeCrawford, CO 路 Marathon 路 Other
- Sun 10/4Windsor Marathon, Half Marathon, 10k, 5k & 1 Mile RunWindsor, CO 路 Marathon 路 Half Marathon 路 10K 路 5K 路 1 Mile
- Sat 10/10Breckenridge RunFestBreckenridge, CO 路 Marathon 路 Half Marathon 路 10K 路 5K 路 1 Mile
- Sat 10/10The Long View MarathonFort Collins, CO 路 Marathon 路 Half Marathon 路 5K
- Sun 10/11Durango MarathonDurango, CO 路 Marathon 路 Half Marathon
- Sat 10/17Blue Sky Trail Marathon & Half MarathonFort Collins, CO 路 Marathon 路 Half Marathon
January 2027
- Sat 1/30Alley LoopCrested Butte, CO 路 Marathon 路 Half Marathon 路 10K 路 5K 路 Other
March 2027
- Sat 3/1322nd Annual Run Through Time Trail Marathon and Half MarathonSalida, CO 路 Marathon 路 Half Marathon 路 Other
May 2027
- Sun 5/2The Colorado MarathonFort Collins, CO 路 Marathon 路 Half Marathon 路 10K 路 5K
- Sat 5/8Valkyrie Trail RaceColorado Springs, CO 路 50K 路 Marathon 路 Other 路 Half Marathon
- Sat 5/15Endure Trail RunsDivide, CO 路 Other 路 Marathon
June 2027
- Sat 6/5Weld Your Mettle Running FestivalEaton, CO 路 50 Mile 路 Ultra 路 Other 路 Marathon 路 50K 路 100+ Mile
- Thu 6/24Race in the Clouds - Alma Dirt Festival 2027Alma, CO 路 Ultra 路 Marathon 路 Half Marathon 路 Other 路 10K
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