Zec du Lac-au-Sable is a "zone d'exploitation contrôlée" (controlled harvesting zone) (zec) located in the unorganized territory of Mont-Élie, in Charlevoix-Est Regional County Municipality, in administrative region of Capitale-Nationale, Quebec, Canada.

The relief of the "Zec du Lac au Sable" is typical of the Charlevoix region.

Depending on the period, logging entreprises carry the cut wood using forested roads in the zec territory.

"ZEC du Lac-au-Sable" was established in 1978 as part of new development policies of provincial government for a better access to some controlled timberlands areas.

On January 31, 1978, under the worker's union of Clermont paper company, members of both clubs agree to apply for accreditation to administer the territory for now the "Zec du Lac-au-Sable".

On April 26, 1978, at a first formal meeting, the two groups agree on forming an interim committee named "Association loisirs et plein air des Marais" (Association recreation and outdoor of Swamps) and was initially registered on April 24, 1978 at the "Registre des entreprises du Québec" (Registrar of enterprises of Quebec) (amendment to registration on February 2, 1995).