From fireman themes to a water park turned into an obstacle course, the popularity of these events continues to grow. Unique twists >>
For athletes looking for a once-in-a-lifetime challenge of will and endurance, these are the most grueling tests on the planet. All over the world >>
If your will to hit the gym is sapped, try these tips. Variety is key >>
Given the choice between competing in a traditional 5k or a course that includes mud, freezing water, and electrocution, more and more Americans are choosing the latter. How extreme races have taken weekends over. A unique challenge >>
