Badwater Ultramarathon™ is the world's toughest foot race. This legendary, epic, 135 mile running race travels non-stop in the heat of Summer from Badwater in Death Valley (elev. 282 feet below sea level) to Whitney Portal on Mt. Whitney (elev. 8360 feet). Field size is limited to up to 90 runners. The 37th edition will take place July 15-17, 2013. For all the info, visit the race's dedicated website at www.badwater.com.