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Colleen De Reuck XC Classic

Harlow Platts Community Park 1400 Knox Dr., Boulder

The Colleen De Reuck Cross Country Classic is a XC meet honoring one of the world's greatest ever distance athletes and Boulder local, Colleen De Reuck. Every year we will celebrate …

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Highlands Ranch Back Country Wilderness Half Marathon

2024 marks the 16th Annual Backcountry Wilderness Half Marathon in Highlands Ranch! This highly-anticipated event invites participants to embark on a 13.1-mile trail race through captivating landscapes, encompassing both the …