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

Kenyan Hellen Obiri, who trains in Boulder, Colorado, defended her title from an elite women's field at the 2024 Boston Marathon.

Winning a single state championship is a tremendous achievement, but winning three, across three separate sports, as Summit junior Ella Hagen already has, is something truly unprecedented. And, she’s done it all with her parents serving as her coaches.

Discover the benefits of high altitude running in Colorado's mountains. Train your body to utilize oxygen more efficiently and improve your overall performance.