The Liard River flows through Yukon, British Columbia and the Northwest Territories, Canada. Rising in the Saint Cyr Range of the Pelly Mountains in southeastern Yukon, it flows 1,115 kilometres (693 mi) southeast through British Columbia, marking the northern end of the Rocky Mountains and then curving northeast back into the Yukon and Northwest Territories, draining into the Mackenzie River at Fort Simpson, Northwest Territories. The river drains approximately 277,100 square kilometres (107,000 sq mi) of boreal forest and muskeg.