Races in Colorado

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

More races: USA running calendar

Date RaceDistanceCityhf:tax:distancecategoryhf:tax:cityhf:tax:typeracehf:tax:monthandyear
03/23/2025Spring Equinox Half Marathon13.1M, 4MFort Collins COhalffort-collins-cotrail03-march
04/01/2025Steve’s Event Page5KMorrison CO5kmorrison-coroadrace04-april
04/05/2025Mav Day 5K Run/Walk5KGrand Junction CO5kgrand-junction-coroadrace04-april
04/11/2025Desert RATS Trail Running Festival100K, 10K, 13.1M, 50KFruita CO10k half ultrafruita-cotrail04-april
04/12/2025Boulder Rez Half Marathon10K, 13.1M, 5KBoulder CO10k 5k halfboulder-cotrail04-april
04/13/2025Platte River Half Marathon13.1MLittleton COhalflittleton-coroadrace04-april
04/13/2025Three Creeks Half Marathon13.1MDenver COhalfdenver-coroadrace04-april
04/13/2025The Spring Fling Prairie Dog Half10K, 13.1M, 5KArvada CO10k 5k halfarvada-coroadrace04-april
04/13/2025Horsetooth Half Marathon13.1MFort Collins COhalffort-collins-coroadrace04-april
04/26/2025Runs with Scissors Races13.1M, 26.2M, 50KBrighton COhalf marathon ultrabrighton-cotrail04-april
04/26/2025Royal Gorge Groove Trail Runs12K, 20K, 30K, 50K, 5KCaรฑon City CO10k-to-half-marathon 5k half half-marathon-to-full-marathon ultracanon-city-cotrail04-april
04/27/2025Blue Heron Half Marathon13.1M, 5KHighlands Ranch CO5k halfhighlands-ranch-cotrail04-april
05/04/2025Longmont Half Marathon13.1M, 5KLongmont CO5k halflongmont-coroadrace05-may
05/04/2025Colorado Marathon10K, 13.1M, 26.2M, 5KFort Collins CO10k 5k half marathonfort-collins-coroadrace05-may
05/10/2025Donot Stop – Denver10K, 5KDenver CO10k 5kdenver-coroadrace05-may
05/10/2025Mountain Ridge Trail Race10K, 13.1M, 21M, 5KHighlands Ranch CO10k 5k half half-marathon-to-full-marathonhighlands-ranch-cotrail05-may
05/10/2025Carbon Valley Half Marathon13.1M, 5KFirestone CO5k halffirestone-coroadrace05-may
05/10/2025Valkyrie Trail Race13.1M, 26.2M, 30K, 4M, 50K, 8MColorado Springs CO10k-to-half-marathon half half-marathon-to-full-marathon marathon ultracolorado-springs-cotrail05-may
05/11/2025Chasing Charlie 5K5KBoulder CO5kboulder-coroadrace05-may
05/11/2025Donot Stop – Colorado Springs10K, 5KColorado Springs CO10k 5kcolorado-springs-coroadrace05-may
05/11/2025Fruita Trail Half13.1MFruita COhalffruita-cotrail05-may
05/17/2025Habitat Archuleta’s 15 Homes in 5K Fun Run5KPagosa Springs CO5kpagosa-springs-coroadrace05-may
05/17/2025Memorial Day Run & March: To Help Feed Homeless Veterans10K, 30K, 5KCastle Rock CO10k 5k half-marathon-to-full-marathoncastle-rock-coroadrace05-may
05/17/2025Endure Trail Runs10K, 12H, 13.1M, 24HDivide CO10k half ultradivide-cotrail05-may
05/17/2025Spirit Challenge Run for Autism10K, 5KSteamboat Springs CO10k 5ksteamboat-springs-coroadrace05-may
05/17/2025Canine On the Creek 5K1M, 5KDumont CO5kdumont-coroadrace05-may
05/17/2025Ram Party15K, 24K, 50K, 55M, 60KColorado Springs CO10k-to-half-marathon half marathon ultracolorado-springs-cotrail05-may
05/17/2025Denver Colfax Marathon10M, 13.1M, 26.2MDenver CO10k-to-half-marathon half marathondenver-coroadrace05-may
05/18/2025Miles for Smiles 5K5KArvada CO5karvada-coroadrace05-may
05/24/2025Weld Your Mettle Running Event12H, 24H, 3H, 6H, 9HEaton COultraeaton-coroadrace05-may
05/24/2025The Valley Bottom Rio Trio5KAlamosa CO5kalamosa-coroadrace05-may
05/25/2025Narrow Gauge 10M10M, 1M, 5KDurango CO5k half-marathon-to-full-marathondurango-coroadrace05-may
05/25/2025Spirit Trail Race13.1M, 26.2M, 9KBuena Vista COhalf marathonbuena-vista-cotrail05-may
05/26/2025Annual Angel Run at Red Leg Brewing10K, 5KColorado Springs CO10k 5kcolorado-springs-coroadrace05-may
05/26/2025BOLDERBoulder 10K10KBoulder CO10kboulder-coroadrace05-may
05/31/2025CKF UNBOUND Gravel100M, 200MAspen COultraaspen-coroadrace05-may
05/31/2025Leadville Turquoise Lake 20K20KLeadville CO10k-to-half-marathonleadville-cotrail05-may
05/31/2025Basalt Half Marathon13.1MBasalt COhalfbasalt-coroadrace05-may
05/31/2025North Fork Trail 50 Mile/50K50K, 50MBuffalo Creek COultrabuffalo-creek-cotrail05-may
06/01/2025Stepping Stone 5K5KLittleton CO5klittleton-coroadrace06-june
06/01/2025Flamingo Day 5K5KDenver CO5kdenver-coroadrace06-june
06/01/2025Fish Hatchery 5K Trail Run5KLeadville CO5kleadville-cotrail06-june
06/01/2025Crazy Legs 10K Trail Run10KLoveland CO10kloveland-cotrail06-june
06/01/2025Steamboat Marathon10K, 13.1M, 26.2MSteamboat Springs CO10k half marathonsteamboat-springs-coroadrace06-june
06/01/2025Colorado 13er10K, 13.1M, 5KLouisville CO10k 5k halflouisville-coroadrace06-june
06/07/2025Aiden’s Adventure 5K5KColorado Springs CO5kcolorado-springs-coroadrace06-june
06/07/2025StepUp For Women And Recovery 5K5KFort Collins CO5kfort-collins-coroadrace06-june
06/07/2025Steamworks Half Marathon13.1MDurango COhalfdurango-coroadrace06-june
06/07/2025Maceโ€™s Hideout 100100M, 50MBeulah COultrabeulah-cotrail06-june
06/07/2025Creede Donkey Dash10M, 3MCreede CO10k-to-half-marathon half-marathon-to-full-marathoncreede-coroadrace06-june
06/07/2025All-Out Summer Breeze Half Marathon10K, 13.1M, 5KArvada CO10k 5k halfarvada-coroadrace06-june
06/07/2025The Great Divide Ultra100K, 100M, 25K, 50KDivide COhalf-marathon-to-full-marathon ultradivide-cotrail06-june
06/08/2025Garden of the Gods 10M Trail Run10K, 10MColorado Springs CO10k half-marathon-to-full-marathoncolorado-springs-cotrail06-june
06/11/2025NoCo All-Comers Track Meet Series5KLoveland CO5kloveland-coroadrace06-june
06/14/2025Sierra’s 5K Run Race Against Meningitis5KLoveland CO5kloveland-coroadrace06-june
06/14/2025Parker Parks and Recreation Cattle Crossing 5K5KParker CO5kparker-coroadrace06-june
06/14/2025Guardian Games & ExpoWindsor COwindsor-coroadrace06-june
06/14/2025Barr Lake13.1M, 15K, 30K, 50K, 5KBrighton CO10k-to-half-marathon 5k half-marathon-to-full-marathon ultrabrighton-coroadrace06-june
06/14/2025Estes Park Marathon and Half Marathon13.1M, 26.2M, 5MEstes Park COhalf marathonestes-park-coroadrace06-june
06/15/2025Father’s Day Classic10K, 1M, 5KArvada CO10k 5karvada-coroadrace06-june
06/21/2025Howelsen Hill Trail Run4M, 8MSteamboat Springs CO10k-to-half-marathon half-marathon-to-full-marathonsteamboat-springs-cotrail06-june
06/21/2025Hometown Half Marathon – Denver10K, 13.1M, 5KWestminister CO10k 5k halfwestminister-coroadrace06-june
06/21/2025Unicorn 5K (North)5KThornton CO5kthornton-coroadrace06-june
06/21/2025Red, White and Brew10K, 12H, 13.1M, 5KWindsor CO10k 5k half ultrawindsor-coroadrace06-june
06/21/2025Ring the Springs100K, 30K, 50KColorado Springs COhalf-marathon-to-full-marathon ultracolorado-springs-cotrail06-june
06/22/2025Hometown Half Marathon – Colorado Springs10K, 13.1M, 5KColorado Springs CO10k 5k halfcolorado-springs-coroadrace06-june
06/22/2025Sunset Trail Running Festival12K, 28K, 5KBoulder CO10k-to-half-marathon 5k half-marathon-to-full-marathonboulder-cotrail06-june
06/22/2025Annual Buffs4Life Kyle MacIntosh Memorial 5K Run5KBoulder CO5kboulder-coroadrace06-june
06/28/2025Denver Pride 5K5KDenver CO5kdenver-coroadrace06-june
06/28/2025Before The Fourth 5K5KLittleton CO5klittleton-coroadrace06-june
06/28/2025Slacker Half Marathon-Relay-4-Mile Races13.1M, 4MGeorgetown COhalfgeorgetown-coroadrace06-june
07/04/2025ROCK-IT Run Half Marathon13.1M, 5KCastle Rock CO5k halfcastle-rock-coroadrace07-july
07/04/2025HRCA Independence Day 5K5KLittleton CO5klittleton-coroadrace07-july
07/04/2025Let Freedom Run10K, 5KLouisville CO10k 5klouisville-coroadrace07-july
07/04/2025Loveland Liberty 5K5KLoveland CO5kloveland-coroadrace07-july
07/04/2025FireKracker 5K5KFort Collins CO5kfort-collins-coroadrace07-july
07/04/2025Greeley Freedom 5K5KGreeley CO5kgreeley-coroadrace07-july
07/04/2025July 4th ROCK-IT Run13.1M, 1K, 5KCastle Rock CO5k halfcastle-rock-coroadrace07-july
07/05/2025Hahns Peak Vertical Trail Race8MClark COhalf-marathon-to-full-marathonclark-cotrail07-july
07/11/2025Silverheels Trail Runs100K, 100M, 10M, 18M, 50M, 60KComo COhalf-marathon-to-full-marathon ultracomo-cotrail07-july
07/12/2025Cookie Chase 5K5KDenver CO5kdenver-coroadrace07-july
07/12/2025Pagosa Duathlon3M, 6MPagosa Springs CO10k-to-half-marathonpagosa-springs-cotrail07-july
07/12/2025All-Out Dog Days Half Marathon10K, 13.1M, 5KWestminster CO10k 5k halfwestminster-coroadrace07-july
07/18/2025High Lonesome100MNathrop COultranathrop-cotrail07-july
07/18/2025Ouray 100 Mile Endurance Run100MOuray COultraouray-cotrail07-july
07/19/2025Spring Creek Memorial Trail Run5K, 9.5MSteamboat Springs CO5k half-marathon-to-full-marathonsteamboat-springs-cotrail07-july
07/19/2025Audi Power of Four Trail Run10K, 25K, 50KAspen CO10k half-marathon-to-full-marathon marathonaspen-cotrail07-july
07/19/2025Summer Splash Prairie Dog Half10K, 13.1M, 5KCastle Rock CO10k 5k halfcastle-rock-coroadrace07-july
07/19/2025Heritage Eagles 5K5KLittleton CO5klittleton-coroadrace07-july
07/19/2025Silverton Alpine Marathons26.2M, 50M, 8MSilverton CO10k-to-half-marathon marathon ultrasilverton-cotrail07-july
07/19/2025Firecracker 4 & 8 Mile – Denver1M, 4M, 8MDenver CO10k-to-half-marathondenver-coroadrace07-july
07/19/2025Aspen Valley Marathon13.1M, 26.2M, 5KAspen CO5k half marathonaspen-cotrail07-july
07/20/2025Barr Trail Mountain Race12.6MManitou Springs COhalf-marathon-to-full-marathonmanitou-springs-cotrail07-july
07/20/2025Firecracker 4 & 8 Mile – Colorado Springs1M, 4M, 8MColorado Springs CO10k-to-half-marathon half-marathon-to-full-marathoncolorado-springs-coroadrace07-july
07/20/2025Kendall Mountain Run11K, 12MSilverton CO10k-to-half-marathonsilverton-cotrail07-july
07/26/2025Box Canyon Trail Races10M, 30KTelluride CO10k-to-half-marathon half-marathon-to-full-marathontelluride-cotrail07-july
07/27/2025Spirit of the West 5K5KGolden CO5kgolden-coroadrace07-july
08/01/2025Annual Wild West Relay200MFort Collins COultrafort-collins-coroadrace08-august
08/01/2025Rocky Mountain Half Marathon13.1M, 5KEstes Park CO5k halfestes-park-coroadrace08-august
08/02/2025Boulder Rez Marathon10K, 13.1M, 19.7M, 26.2MBoulder CO10k half half-marathon-to-full-marathon marathonboulder-coroadrace08-august
08/02/2025Flying Colors 5K Fun Run5KCraig CO5kcraig-coroadrace08-august
08/02/2025Unicorn 5K (South)5KHighlands Ranch CO5khighlands-ranch-coroadrace08-august
08/02/2025Kennebec Mountain Run15MHesperus COhalf-marathon-to-full-marathonhesperus-cotrail08-august
08/02/2025Sheep Mountain Trail Runs13.1M, 50K, 50MFairplay COhalf marathon ultrafairplay-cotrail08-august
08/02/2025Valley 50005KLoveland CO5kloveland-coroadrace08-august
08/02/2025Emerald Mountain Epic Marathon10K, 13.1M, 26.2MSteamboat Springs COhalf marathonsteamboat-springs-cotrail08-august
08/02/2025All-Out Runapalooza Half Marathon10K, 13.1M, 5KArvada CO10k 5k halfarvada-coroadrace08-august
08/04/2025TransRockies Run Charity Bibs120 MilesBuena Vista CO120mbuena-vista-cotrail08-august
08/05/2025Eltuck Valley 5K5KBellvue CO5kbellvue-coroadrace08-august
08/08/2025Choice City Running Festival10K, 13.1M, 5KFort Collins CO10k 5k halffort-collins-coroadrace08-august
08/09/2025Georgetown to Idaho Springs Half Marathon13.1MGeorgetown COhalfgeorgetown-coroadrace08-august
08/09/2025Run the Rockies Trail Race10K, 13.1M, 5KFrisco CO10k 5k halffrisco-cotrail08-august
08/09/2025Holy COW Trail Stampede5KWestminster CO5kwestminster-cotrail08-august
08/09/2025Severance Days 5K5KSeverance CO5kseverance-coroadrace08-august
08/09/2025Human Race Half Marathon10K, 13.1M, 1M, 5KFort Collins CO10k 5k halffort-collins-coroadrace08-august
08/12/2025Into the Hills Eltuck 10K10KBellvue CO10kbellvue-coroadrace08-august
08/16/2025Summer Sizzler- Denver10K, 15K, 5KWestminster CO10k 10k-to-half-marathon 5kwestminster-coroadrace08-august
08/16/2025CKF Leadville Trail 100 Run100MAspen COultraaspen-cotrail08-august
08/16/2025The Cheyenne Mountain Run10K, 25K, 5KColorado Springs CO10k 5k half-marathon-to-full-marathoncolorado-springs-cotrail08-august
08/16/2025Mt Sneffels Marathon10K, 13.1MOuray CO10k halfouray-coroadrace08-august
08/17/2025Summer Sizzler- Colorado Springs10K, 15K, 1M, 5KColorado Springs CO10k 10k-to-half-marathon 5kcolorado-springs-coroadrace08-august
08/17/2025Erie Half13.1M, 5KErie CO5k halferie-coroadrace08-august
08/19/2025Into the Hills Eltuck 5K5KBellvue CO5kbellvue-coroadrace08-august
08/23/2025Rocky Mountain 5K5KColorado Springs CO5kcolorado-springs-coroadrace08-august
08/23/2025Byers Peak Stampede Half Marathon13.1M, 5KWinter Park CO5k halfwinter-park-coroadrace08-august
08/23/2025Continental Divide Trail Run16M, 50K, 5MSteamboat Springs CO10k-to-half-marathon marathon ultrasteamboat-springs-cotrail08-august
08/23/2025TBK Bank Thirsty 13 Half Marathon13.1MDurango COhalfdurango-coroadrace08-august
08/23/2025Staunton Rocks! Marathon & Half Marathon13.1M, 26.2MPine COhalf marathonpine-cotrail08-august
08/23/2025Thirsty 13 Half Marathon13.1MDurango COhalfdurango-coroadrace08-august
08/23/2025Byers Peak Stampede Half Marathon13.1M, 5KWinter Park CO5k halfwinter-park-cotrail08-august
08/24/2025Unicorn 5K & Festival (West)5KLittleton CO5klittleton-coroadrace08-august
08/26/2025Eltuck Valley 12K12KBellvue CO10k-to-half-marathonbellvue-coroadrace08-august
08/30/2025South Fork Alder Ass Race11M, 3MSouth Fork CO10k-to-half-marathon half-marathon-to-full-marathonsouth-fork-coroadrace08-august
08/30/2025Creede Mountain Run12M, 22M, 2M, 50KCreede CO10k-to-half-marathon half-marathon-to-full-marathon ultracreede-cotrail08-august
08/30/2025Grand Traverse Mountain Run40MCrested Butte COultracrested-butte-cotrail08-august
08/31/2025Wine Run 5K at The Winery at Holy Cross Abbey5KCaรฑon City CO5kcanon-city-coroadrace08-august
08/31/202510K at 10,000 Feet Trail Run10K, 5KSteamboat Springs CO10k 5ksteamboat-springs-cotrail08-august
09/01/2025Labor Day Half Marathon10K, 13.1M, 5KParker CO10k 5k halfparker-coroadrace09-september
09/05/2025American Heroes Run100M, 13.1M, 24H, 26.2M, 5K, 9.11M, 9HLongmont CO5k half marathon ultralongmont-coroadrace09-september
09/05/2025Flaming Foliage Relay – Idaho Springs to Buena Vista165MIdaho Springs COultraidaho-springs-cotrail09-september
09/06/2025RexRun For PAWSitivity 5K Trail Run5KAurora CO5kaurora-cotrail09-september
09/06/2025Devil on the Divide22K, 50KEmpire COhalf ultraempire-cotrail09-september
09/06/2025The Gunni Grinder120M, 30M, 60MGunnison COultragunnison-coco gunnison trail09-september
09/06/2025Cirque Series – Arapahoe Basin9MArapahoe Basin CO10k-to-half-marathonarapahoe-basin-cotrail09-september
09/06/2025Imogene Pass Run17.1MTelluride COhalf-marathon-to-full-marathontelluride-cotrail09-september
09/06/2025Black Squirrel Half Marathon13.1MFort Collins COhalffort-collins-cotrail09-september
09/12/2025Run Rabbit Run100M, 50MSteamboat Springs COultrasteamboat-springs-cotrail09-september
09/13/2025Trail Sisters Women’s Half Marathon10K, 13.1MBuena Vista CO10k halfbuena-vista-cotrail09-september
09/13/2025All-Out Fall Fest10K, 13.1M, 5KWestminster CO10k 5k halfwestminster-coroadrace09-september
09/13/2025The Denver 5K5KDenver CO5kdenver-coroadrace09-september
09/13/2025Ned Ned Run Half Marathon10K, 13.1M, 5KNederland CO10k 5k halfnederland-cotrail09-september
09/27/2025HRCA Oktoberfest 5K5KLittleton CO5klittleton-coroadrace09-september
10/04/2025I Can 5K5KBrighton CO5kbrighton-coroadrace10-october
10/05/2025Hot Chocolate Run โ€“ Denver10K, 15K, 5KDenver CO10k 10k-to-half-marathon 5kdenver-coroadrace10-october

Colorado Race Calendars:

5K Races 10K Races
Half Marathons Marathons
Ultra Marathons Trail Races
Denver Colorado Springs
Aurora Fort Collins

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