Pikauba Lake is located in the central part of the Laurentides Wildlife Reserve.

The Northwest Pikauba River is served by a few other secondary forest roads for forestry and recreational tourism activities.

The mouth of Pikauba Lake is located approximately 3.5 km (2.2 mi) northeast of the boundary of the administrative regions of Saguenay-Lac-Saint-Jean and Capitale-Nationale.

"Kopau" is an Innu ending in this indicative to designate a lake with alders, rushes and others.

The toponym "Lac Pikauba" was formalized on December 5, 1968} by the Commission de toponymie du Québec.