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Upcoming Half Marathon Races Near Grand County, CO in August, 2025

Staunton Rocks! Marathon & Half logo

Staunton Rocks! Marathon & Half

Conifer, CO

Saturday, August 23rd, 2025

Half
Marathon
Trail
View details for race Staunton Rocks! Marathon & Half
Byers Peak Stampede Half Marathon & 5K Run logo

Byers Peak Stampede Half Marathon & 5K Run

Fraser, CO

Saturday, August 23rd, 2025

Half
5K
Trail
View details for race Byers Peak Stampede Half Marathon & 5K Run
Staunton Rocks! Marathon and Half Marathon logo

Staunton Rocks! Marathon and Half Marathon

Pine, CO

Saturday, August 23rd, 2025

Marathon
Half
Trail
View details for race Staunton Rocks! Marathon and Half Marathon
Calarat Challenge Trail Running Festival logo

Calarat Challenge Trail Running Festival

Jamestown, CO

Saturday, August 30th, 2025

Half
10K
5K
Trail
View details for race Calarat Challenge Trail Running Festival

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