Mauricie is a traditional and current administrative region of Quebec. La Mauricie National Park is contained within the region, making touris…Mauricie is a traditional and current administrative region of Quebec. La Mauricie National Park is contained within the region, making tourism in Mauricie popular. The region has a land area of 35,860.05 km² and a population of 266,112 residents as of the 2016 Census. Its largest cities are Trois-Rivières and Shawinigan.