If you're an ultrarunner, you'll love this short video of the 2014 Leadville 100 that took place Aug. 16-17 in the high country of Colorado.
Check out the amazing images from this year's Leadville 100.
What it takes to compete in 5 high-altitude races in six weeks.
In the 100-mile distance, it’s about the guy who slows the least over the course of the race, not the one who finishes the strongest.
Check out these photos from the Leadville 100!
The 2010 Leadville 100 champion returns to the race she loves.
The marathoner turned ultrarunner is ready for his first 100 miler.
Anton Krupicka talks about living and training in Leadville, Colorado in preparation for this weekend's Leadville Trail 100 Run.
The race series dates back to 1983.