Marcella Vivrette Smith Park only allows hikers on its six miles of off-road trails.
Patrick Smyth defended his men's title and Kimber Mattox won the women's race.
Here are 5 men and 5 women to keep an eye on at the North Face Endurance Challenge Championship on Saturday.
A mountain, a running store and a ton of local talent have elevated the Bay Area to become the hottest underground scene in trail running.
One of the most stunning trails in the United States was explored recently by two world-class ultrarunners.
The Spaniard won nine races in 2014 and placed second in another one.
Get an inside look at running on one of the United States' most stunning trails.
Jason Devaney writes about his first trail race, which was chock-full of steep climbs, rocks, roots and mud.
The trail run explores the rugged terrain of south Texas.