The U.S. Skyrunner Series will include 19 races in 2015.
High-altitude mountain running, also known as skyrunning, is one of the most challenging settings for a runner to compete in.
The Loon Mountain Race is one of the steepest trail races in North America.
What goes up, must come down.
You'll need these 11 essential pieces of gear for mountain running.
There's nowhere to go but up.
Competitor editor-in-chief Brian Metzler wins Contributor of the Year.
The American ultrarunner talks about juggling racing with owning a small business and more.
Stevie Kremer clocked the second fastest descent in Pike's Peak Marathon history.
Safety is now more important than ever.