This lake is famous for the Montagne du Lac Émeraude and is linked to the Portneuf Regional Natural Park and for vacationing because around forty chalets are built there.

The surface of Emauraude Lake is usually frozen from the beginning of December to the end of March, however the safe circulation on the ice is generally made from mid-December to mid-March.

Comprising 70 kilometres (43.50 mi), this park includes the Long lakes, Montauban, Carillon, Sept Îles, Lac en Coeur, "À l'Anguille" and some other more secondary bodies of water.

While the term "Emerald" refers to a mineral, from the group of silicate s, subgroup of cyclosilicate s, variety of beryl, whose green color comes from traces of chromium, vanadium and sometimes iron.

The toponym "Lac Émeraude" (Portneuf) was registered on June 7, 1996, in the Place Names Bank of the Commission de toponymie du Québec.