The Lac de l'Enfer is a body of water in the watershed of the Rivière à Mars and the Saguenay River. Lac de l'Enfer is located in the unorganized territory of Lac-Pikauba, in the MRC of Charlevoix Regional County Municipality, in the administrative region of Capitale-Nationale, in the province of Quebec, in Canada. Lac de l'Enfer is located in the northern part of the Laurentides Wildlife Reserve.