La Mauricie National Park is located in the Laurentian mountains in the Mauricie region of Québec, Canada. It covers 536 km² in the southern Canadian Shield region bordering the Saint Lawrence lowlands. The park contains 150 lakes and many ponds. The park lies within the Eastern forest-boreal transition ecoregion. The forests in this region were logged from the middle of the 19th century to the early 20th century. The park's forests have regrown and contain a mixture of conifers and mixed deciduous trees.
Wildlife in the park includes moose, black bears, beavers and otters. It supports a small number of wood turtles, rare in Canada. The park is a popular location for camping, canoeing and kayaking. The park is named after the nearby Saint-Maurice River to the east of the park. The Matawin River flows along the west and north borders of the park.