 The Ecological Reserve protects a forest of Eastern white pine, red pine and pine gray.The name commemorates Joseph Caron (1889-1960), better known as Brother Irénée-Marie of the Congregation of Christian Brothers, one of the colleagues of brother Marie-Victorin.The reserve is located approximately west of Saint-Joseph-de-Mékinac, in the Matawin River drainage basin, and surrounded by the ZEC Chapeau de Paille.