The first wave of runners in the Badwater Ultramarathon begins at 6am local time in Badwater, California. Badwater is an endurance running event whose completion is no minor accomplishment. From its below-sea-level start in Death Valley to its finish 135 miles later on the slopes of Mount Whitney, difficulties abound for even the most dedicated runners. Interestingly, though, one of the primary challenges--the region's extreme heat--seems rather less extraordinary in light of recent high temperatures across the nation: it's 84° in Death Valley for the race's start, with a projected high of 108° today.
Here's the trailer from the documentary Running on the Sun (2000) about Badwater: