Run one of the Seven Natural Wonders of the World.
The 6.6-mile course will climb 2,950 feet to the summit of Loon Mountain Ski Area.
An ultramarathon among the alligators in Texas.
Reactions are mixed regarding the former cyclist's participation in the event.
Every state in the U.S. has a beautiful trail to run on.
As the sport emerges from its grassroots beginnings, it finds itself at a rather challenging inflection point.
Each athlete took home $10,000 for the win.
A chance to run around an active volcano.
Views of three states and two countries as you ascend West Texas mountains.
One of the most popular trails in the Los Angeles area.