The Badwater Ultramarathon describes itself as "the world's toughest foot race". It is a 135-mile (217 km) course starting at 282 feet (86 m) below sea level in the Badwater Basin, in California's Death Valley, and ending at an elevation of 8360 feet (2548 m) at Whitney Portal, the trailhead to Mount Whitney. It takes place annually in mid-July, when the weather conditions are most extreme and temperatures over 120 °F (49 °C), even in the shade, are not uncommon.