A visitor flies into Denver from sea level, rents a car and drives up to Summit County. Braving the traffic, potholes and white-knuckle turns along the Interstate 70 mountain corridor, they get to one ...

In 2025, Kilian Jornet once again redefined the limits of human performance in the mountains and in ultra-endurance, ...

In this year’s four-part series, we explore how high elevation affects the biological and physiological processes of the body, what performance gains can be experienced after spending time at altitude ...

OxyStrength,a women-owned, science-driven brand specializing in high-altitude performance, has introduced the Summit Performance Stack. This revolutionary system provides a holistic solution to the ...

New perk: Easily find new routes and hidden gems, upcoming running events, and more near you. Your weekly Local Running Newsletter has everything you need to lace up! Subscribe today. It was pretty ...

Alex Hutchinson is a National Magazine Award-winning journalist and Outside’s Sweat Science columnist, covering the latest research on endurance and outdoor sports. New perk: Easily find new routes ...

It’s common for athletes to seek new ways to improve their athletic performance. One popular strategy is high altitude training, also known as high elevation training. This method involves training at ...