The Northwest Passage Drive Expedition (NWPDX) (2009–2011) was a multi-stage vehicular expedition from the North American mainland to Devon Island in the high Arctic, by way of the Northwest Passage. The expedition was led by planetary scientist Pascal Lee. Although the expedition was primarily logistical and was not intended to be a high fidelity simulation of a crewed pressurized rover traverse on the Moon or Mars, it was the first long-distance road trip dedicated to planetary exploration studies and provided important lessons for planning future long-range vehicular traverses off Earth. The expedition was also the first crossing of the Northwest Passage in a road vehicle. The first stage of the expedition, NWPDX-2009, established a record for the longest distance driven continuously on sea-ice in a road vehicle: 496 km (308 mi).