Extreme Marathons

Kiehl's Badwater Ultramarathon, Death Valley, Nevada
The starting point for this race is located at Badwater, 282 feet below sea level and the lowest point in the Western Hemisphere, and finishes at the Mt. Whitney Portals, 8,360 feet above sea level. The winner usually completes the course in under 24 hours.

• A Brief History of the Marathon