[1] The Ontaritzi river valley is mainly served on the north side by the Duchesnay road.

Located to the northwest of the city of Quebec, Saint-Joseph Lake is a very popular site for recreational tourism activities including the resort.

The surface of the Ontaritzi River (except the rapids areas) 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.

The plan of Nicolas Vincent, Wendat chief of Lorette, drawn up in 1829, attributes to this lake the name Ontaritai.

[4] The toponym Ontaritzi river was formalized on October 2, 1980 at the Place Names Bank of the Commission de toponymie du Québec.