Yes, several people have successfully walked across Death Valley, though it is considered one of the most dangerous and physically demanding treks on Earth. Most famous is the "Badwater to Whitney" route, which begins at the lowest point in North America (Badwater Basin) and ends at the summit of Mount Whitney. While many athletes complete this as a run during the Badwater 135 ultramarathon, solo unsupported hikers have also crossed the valley floor. In 2011, adventurer Louis-Philippe Loncke completed the first unsupported longitudinal crossing of the park, carrying all his food and water for several days. Such endeavors are strictly regulated by the National Park Service, especially during the summer months when ground temperatures can exceed 200°F (93°C). Walking through the valley requires extreme preparation, as dehydration and heatstroke can become fatal within hours. Most hikers choose the "winter" window between November and March to avoid the lethal heat that has claimed the lives of numerous unprepared tourists over the decades.