Half Marathons in Colorado

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

More races:ย USA running calendar

Date RaceDistanceLocationhf:tax:monthandyearhf:tax:cityhf:tax:typerace
01/19/2025Arctic Prairie Dog Half Marathon10K, 13.1M, 5KWestminster CO01-januarywestminster-coroadrace
02/09/2025Super Half Marathon and Game Day 5K13.1M, 5KColorado Springs CO02-februarycolorado-springs-coroadrace
02/15/2025Stories Ultra10K, 13.1M, 15H, 30H, 6HColorado Springs CO02-februarycolorado-springs-cotrail
02/16/2025Ralston Creek Half Marathon13.1M, 5KArvada CO02-februaryarvada-coroadrace
02/22/2025All-Out Mardi Crawl 5K, 10K and Half Marathon10K, 13.1M, 5KArvada CO02-februaryarvada-cotrail
03/02/2025That Dam Run10K, 13.1M, 5KDenver CO03-marchdenver-coroadrace
03/08/2025Run Through Time Trail Marathon13.1M, 26.2M, 2MSalida CO03-marchsalida-cotrail
03/23/2025Spring Equinox Half Marathon13.1M, 4MFort Collins CO03-marchfort-collins-cotrail
04/11/2025Desert RATS Trail Running Festival100K, 10K, 13.1M, 50KFruita CO04-aprilfruita-cotrail
04/13/2025Platte River Half Marathon13.1MLittleton CO04-aprillittleton-coroadrace
04/13/2025Three Creeks Half Marathon13.1MDenver CO04-aprildenver-coroadrace
04/13/2025The Spring Fling Prairie Dog Half10K, 13.1M, 5KArvada CO04-aprilarvada-coroadrace
04/13/2025Horsetooth Half Marathon13.1MFort Collins CO04-aprilfort-collins-coroadrace
04/26/2025Runs with Scissors Races13.1M, 26.2M, 50KBrighton CO04-aprilbrighton-cotrail
04/26/2025Royal Gorge Groove Trail Runs12K, 20K, 30K, 50K, 5KCaรฑon City CO04-aprilcanon-city-cotrail
05/04/2025Longmont Half Marathon13.1M, 5KLongmont CO05-maylongmont-coroadrace
05/04/2025Colorado Marathon10K, 13.1M, 26.2M, 5KFort Collins CO05-mayfort-collins-coroadrace
05/10/2025Valkyrie Trail Race13.1M, 26.2M, 30K, 4M, 50K, 8MColorado Springs CO05-maycolorado-springs-cotrail
05/11/2025Fruita Trail Half13.1MFruita CO05-mayfruita-cotrail
05/17/2025Endure Trail Runs10K, 12H, 13.1M, 24HDivide CO05-maydivide-cotrail
05/17/2025Ram Party15K, 24K, 50K, 55M, 60KColorado Springs CO05-maycolorado-springs-cotrail
05/17/2025Denver Colfax Marathon10M, 13.1M, 26.2MDenver CO05-maydenver-coroadrace
05/25/2025Spirit Trail Race13.1M, 26.2M, 9KBuena Vista CO05-maybuena-vista-cotrail
06/01/2025Steamboat Marathon10K, 13.1M, 26.2MSteamboat Springs CO06-junesteamboat-springs-coroadrace
06/01/2025Colorado 13er10K, 13.1M, 5KLouisville CO06-junelouisville-coroadrace
07/04/2025ROCK-IT Run Half Marathon13.1M, 5KCastle Rock CO07-julycastle-rock-coroadrace
07/04/2025July 4th ROCK-IT Run13.1M, 1K, 5KCastle Rock CO07-julycastle-rock-coroadrace
07/12/2025All-Out Dog Days Half Marathon10K, 13.1M, 5KWestminster CO07-julywestminster-coroadrace
07/19/2025Summer Splash Prairie Dog Half Marathon10K, 13.1M, 5KCastle Rock CO07-julycastle-rock-coroadrace

Colorado Race Calendar

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