Ultra Marathons in Colorado

Upcoming ultra marathons in Colorado. Use filters to quickly find races by month, city or race type.

More races: USA running calendar

Date RaceDistanceLocationhf:tax:monthandyearhf:tax:cityhf:tax:typerace
07/12/2024Silverheels Trail Runs100K, 100M, 10M, 18M, 50M, 60KComo CO07-julycomo-cotrail
07/19/2024High Lonesome100MNathrop CO07-julynathrop-cotrail
07/19/2024Ouray 100 Mile Endurance Run100MOuray CO07-julyouray-cotrail
07/28/2024World Championship Pack Burro Race15M, 29MFairplay CO07-julyfairplay-coroadrace
08/02/2024Annual Wild West Relay200MFort Collins CO08-augustfort-collins-coroadrace
08/03/2024Kennebec Mountain Run15MHesperus CO08-augusthesperus-cotrail
08/03/2024Sheep Mountain Trail Runs13.1M, 50K, 50MFairplay CO08-augustfairplay-cotrail
08/17/2024CKF Leadville Trail 100 Run100MAspen CO08-augustaspen-cotrail
08/24/2024Continental Divide Trail Run16M, 50K, 5MSteamboat Springs CO08-auguststeamboat-springs-cotrail
08/31/2024Creede Mountain Run12M, 22M, 2M, 50KCreede CO08-augustcreede-cotrail
08/31/2024Grand Traverse Mountain Run40MCrested Butte CO08-augustcrested-butte-cotrail
09/06/2024American Heroes Run100M, 13.1M, 24H, 26.2M, 5K, 9.11M, 9HLongmont CO09-septemberlongmont-coroadrace
09/06/2024Flaming Foliage Relay – Idaho Springs to Buena Vista165MIdaho Springs CO09-septemberidaho-springs-cotrail
09/07/2024Devil on the Divide22K, 50KEmpire CO09-septemberempire-cotrail
09/07/2024The Gunni Grinder120M, 30M, 60MGunnison CO09-septembergunnison-coco gunnison trail
09/13/2024Run Rabbit Run100M, 50MSteamboat Springs CO09-septembersteamboat-springs-cotrail
09/20/2024Red Feather Trail Jamboree13.1M, 50K, 50MRed Feather Lakes CO09-septemberred-feather-lakes-cotrail
09/21/2024Snow Mountain Ranch Trail Festival10K, 13.1M, 50K, 5KGranby CO09-septembergranby-cotrail
09/21/2024Snow Mtn Ranch Trail Festival10K, 13.1M, 50K, 5KGranby CO09-septembergranby-cotrail
09/21/2024Battle by the Brook20M, 6MDeckers CO09-septemberdeckers-cotrail
09/28/2024West Line Winder 50K30K, 50KBuena Vista CO09-septemberbuena-vista-cotrail
09/28/2024Sangre de Cristo Ultras100K, 100M, 150M, 200M, 27K, 50K, 50M, 8MWestcliffe CO09-septemberwestcliffe-cotrail
09/28/2024Bear Chase Race – Half Marathon & 10K100K, 10K, 13.1M, 50K, 50MLakewood CO09-septemberlakewood-cotrail
09/28/2024Sangre de Cristo Trail Festival100K, 100M, 150M, 200M, 27K, 50K, 50M, 8MWestcliffe CO09-septemberwestcliffe-cotrail
09/28/2024Crested Butte Ultra35K, 50M, 55KCrested Butte CO09-septembercrested-butte-cotrail
09/28/202424 Hours of Palmer Lake24HPalmer Lake CO09-septemberpalmer-lake-cotrail
09/29/2024Sawatch Ascent 50K50KNathrop CO09-septembernathrop-cotrail
10/05/2024Hanging Flume 50K50KUravan CO10-octoberuravan-cotrail
10/05/2024Above the Clouds Ultra10K, 50KWoodland Park CO10-octoberwoodland-park-cotrail
10/12/2024Indian Creek Fifties15M, 50M, 55K, 5MSedalia CO10-octobersedalia-cotrail
10/12/2024Indian Creek Trail Runs15M, 50M, 55K, 5MSedalia CO10-octobersedalia-cotrail
10/12/2024Sage Burner Trail Race13K, 28K, 50KGunnison CO10-octobergunnison-cotrail
11/02/2024Bridge Burner Ultra35K, 35MCañon City CO11-novembercanon-city-cotrail
11/02/2024Colorado 24 Hour Run12H, 24H, 6HFort Collins CO11-novemberfort-collins-cotrail
11/09/2024Kessel Run Ultra10M, 20M, 50M, 60KFruita CO11-novemberfruita-cotrail
11/09/2024BINGO! Trail Runs10M, 20M, 42M, 54MByers CO11-novemberbyers-cotrail
11/30/2024Colorado Cold Rush Ultra10K, 13.1M, 50KColorado Springs CO11-novembercolorado-springs-cotrail
12/07/2024Sawmill Trail Runs16M, 50K, 8MPine CO12-decemberpine-cotrail
12/07/2024Ugly Sweater 1 Miler1MBuena Vista CO12-decemberbuena-vista-coroadrace
02/15/2025Stories Ultra10K, 13.1M, 15H, 30H, 6HColorado Springs CO02-februarycolorado-springs-cotrail

Colorado Race Calendar

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