Your Challenge:

By the challenge end date, track that you've run 135 miles, the equivalent of the legendary Badwater Ultramarathon.

Why Do This?

Each July, elite runners are invited to run 135 miles in the extreme heat of California's Death Valley. Only 60-80% of those who start ever reach the finish line. The current course record? 22 hours and 51 minutes.

• Official Badwater Website, badwater.com
• '60 Minutes' story from the 2004 Badwater, Watch on YouTube
• Who runs ultra-marathons (100 miles or more), anyway? 'Ultra' is a short documentary that follows three runners with the 100-mile goal in mind. How To Run an Ultramarathon

Hydrate Yourself
(Free; iTunes)

RunKeeper
(Free; iTunes, Android)

Active.com
(Free; iTunes and Android)