Colorado Runner - Colorado's running news, events and results source

The Denver Colfax Marathon, presented by Cigna Healthcare, is proud to announce their 2025 race season sponsor line up ahead of its spring race weekend in the Mile High. Denver’s only marathon weekend will take place May 16 – 18th, 2025.

The Greenland Trail 50K has been awarded the Road Runners Club of America Western Region Ultra Championship. The race is scheduled for May 6, 2023 in Larkspur, Colorado at the Greenland Open Space Park in southern Douglas County, south of Castle Rock, just off I-25.

On Saturday, April 12, four athletes – the top two US men and the top two US women – earned spots at the Gorge Waterfalls 100K in Cascade Locks, OR, to represent their country at the World Mountain and Trail Running Championships racing the long trail race on Saturday, September 27, in Canfranc,…