The Lac Tourilli watershed is served by a few secondary forest roads for the purposes of forestry and recreational tourism activities.

[1] Forestry is the main economic activity in the sector; recreational tourism, second.

[2] The surface of Lac Tourilli is generally frozen from the beginning of December to the end of March; safe circulation on the ice is generally done from the end of December to the beginning of March.

It has four large bays: The mouth of Lac Tourilli is located 2.7 kilometres (1.7 mi) southwest of Gregory Lake, 13.6 kilometres (8.5 mi) west of the course of Jacques-Cartier River and 32.6 kilometres (20.3 mi) north of the confluence of the Tourilli River and the Sainte-Anne River.

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