Lacs des Loups Marins is a vast and remote freshwater lake system located in the Nunavik region of the Ungava Peninsula in northern Quebec, Canada, approximately 250 km east of Hudson Bay. The system spans roughly 500 km² as the core area, with a broader interconnected network of approximately 670 km² encompassing Petit Lac des Loups Marins and Lac Bourdel. Situated at approximately 56°30′N 73°45′W in the post-glacial landscape of the far north, this is one of the most isolated and ecologically distinctive lake systems in Canada. The entire complex lies within Tursujuq National Park, established in 2013 and covering 15,549 km² along the Hudson Bay coast — one of the largest national parks in Quebec. The landscape is shaped by post-glacial isostatic rebound, and the interconnected lakes and rivers that make up this system drain into the Nastapoka River watershed, which flows into the eastern shore of Hudson Bay.