AdventureCORPS Badwater Ultramarathon
Currently, AdventureCORPS manages the competitive race from Badwater to Whitney Portal. The course route is specified, and the race is held annually. The field is invitation-only and limited in size. Demand to participate in the race usually far exceeds available spots. Rules have changed somewhat over the years: afternoon starts have been discontinued; the use of intravenous fluids now disqualifies a runner.
Course support is not provided. Each runner must arrange for his or her own support crew and vehicle. The crew provides their runner with his or her needs, including water, ice, food, gear, pacing, and first aid.
Runners who complete the course in sixty hours receive a commemorative medal; runners who complete the course in forty-eight hours receive a belt buckle. No prize money is awarded.
The record for the 146-mile (235 km) race was set in 1991 by Marshall Ulrich: 33 hours and 54 minutes. Records for the current 135-mile (217 km) course are 22 hours 51 minutes 29 seconds (men), set by Valmir Nunes, and 26 hours 16 minutes 12 seconds (women), set by Jamie Donaldson.
In the last few years, 70 to 80 people have competed in each race, with 20–40% failing to reach the finish line. There have been no fatalities.
The 2011 winner was Mexican Oswaldo López.
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