Upcoming Ultra Races Near Greeley, CO

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Red, White and Brew 5k, 10k, Half Marathon & 12...

Windsor, CO

Saturday, June 20th, 2026

Featured

10K

Half

View details for race Red, White and Brew 5k, 10k, Half Marathon & 12 Hour Last Person Standing

RMRR Fall Marathon Training Series

Thornton, CO

Sunday, August 23rd, 2026

10 Miles

Ultra

View details for race RMRR Fall Marathon Training Series

RMRR Fall Marathon Training Series #2

Thornton, CO

Sunday, September 13th, 2026

Ultra

View details for race RMRR Fall Marathon Training Series #2

Buffalo Bicycle Classic

Boulder, CO

Sunday, September 13th, 2026

Ultra

View details for race Buffalo Bicycle Classic

Estes Epic

Estes Park, CO

Saturday, September 26th, 2026

Ultra

Trail

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RMRR Fall Marathon Training Series #3

Thornton, CO

Sunday, September 27th, 2026

10 Miles

Ultra

View details for race RMRR Fall Marathon Training Series #3

Weld Your Mettle Running Festival

Eaton, CO

Saturday, June 5th, 2027

Ultra

Marathon

View details for race Weld Your Mettle Running Festival

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