Mashteuiatsh is a First Nations reserve in the Saguenay–Lac-Saint-Jean region of Quebec, Canada, about 6 km north from the centre of Roberval. It is the home to the Pekuakamiulnuatsh First Nation. It is located on a headland jutting out on the western shores of Lake Saint-Jean known as Pointe-Bleue, in the geographic township of Ouiatchouan, and belongs to the Montagnais du Lac St-Jean Innu band.Wikipedia