2018 - 2019 Colorado Race Calendar in August

Browse our Marathons, Half Marathons, Ultra marathons, Multiday events organized in Colorado during the month of August among 73 races.

73 races

Colorado Cancer Foundation Race for the Cure

2018-08-03 - 18:00
North America / USA / Mountain Region / Colorado / Eldorado Springs
Shorter than 10 km race
Road Running Solo

Rocky Mountain Half Marathon

2018-08-03 - 06:00
North America / USA / Mountain Region / Colorado / Estes Park
Half Marathon
Mountain Running Mountain

Atalanta

1.5 mile walk
2018-08-04 - 07:45
North America / USA / Mountain Region / Colorado / Pueblo
5k race
Road Walking Solo

Atalanta

5-km run
2018-08-04 - 08:00
North America / USA / Mountain Region / Colorado / Pueblo
5k race
Road Running Solo

Mountain Ave Mile 2018

2018-08-09 - 18:00
North America / USA / Mountain Region / Colorado / Fort Collins
Shorter than 10 km race
Road Running Solo

Six Pack Summer Series Westminster- 5 mile & 5k

5k
2018-08-09 - 18:30
North America / USA / Mountain Region / Colorado / Westminser
5k race
Running

Six Pack Summer Series Westminster- 5 mile & 5k

5 miles
2018-08-09 - 18:30
North America / USA / Mountain Region / Colorado / Westminser
Shorter than 10 km race
Running

Ragnar Relay Colorado

Ultra
2018-08-10
North America / USA / Mountain Region / Colorado / Aspen
Ultramarathon
Mountain Road Running Mountain Relay

Ragnar Relay Colorado

Regular
2018-08-10
North America / USA / Mountain Region / Colorado / Aspen
Ultramarathon
Mountain Road Running Mountain Relay

Aspen Backcountry Marathon

Marathon
2018-08-11 - 06:00
North America / USA / Mountain Region / Colorado / Aspen
Marathon
Mountain Trail Running Hilly Solo

Aspen Backcountry Marathon

Half Marathon
2018-08-11
North America / USA / Mountain Region / Colorado / Aspen
Half Marathon
Mountain Trail Running Mountain Solo

Holy COW Trail Stampede

5k
2018-08-11 - 08:00
North America / USA / Mountain Region / Colorado / Westminster
5k race
Trail Running
Upcoming races first Name A->Z Name Z->A Location A->Z Location Z->A Date older->newer Date newer-> older