The Grand lac des Enfers (English: Great lake of the Hells) is a freshwater body located in the unorganized territory of Lac-Pikauba, in the Charlevoix Regional County Municipality, in the administrative region of Capitale-Nationale, in the province of Quebec, in Canada.

A forest road serves the hydrographic slope of Grand lac des Enfers.

This lake is located in a forest area in Lac-Pikauba and it is landlocked between the mountains, particularly the cliffs of the North shore.

From there, the current descends the "rivière de l'Enfer" generally east on 16.2 kilometres (10.1 mi), then follows the course of the Malbaie river on 130.9 kilometres (81.3 mi) with a drop of 716 metres (2,349 ft) which drains to La Malbaie in the St. Lawrence River.

The toponym "Grand lac des Enfers" was formalized on December 5, 1968, at the Place Names Bank of the Commission de toponymie du Québec.