The surface of Quénonisca Lake is usually frozen from early November to mid-May, however, safe ice circulation is generally from mid-November to mid-April.

In addition, the Broadback River crosses the northern part of Quenonisca Lake to the west.

Areas around the lake have a generally level topography, except for: The "Intrusive Rocher-Quenonisca Suite" includes the Whitefish Intrusion (nAwf) that outcrops mainly between lakes Quenonisca and Rocher (NTS sheets 32K09 and 32K10), Rocher Intrusion (nAlrc) and another small peridotite intrusion of less than 15 kilometres (9.3 mi) in diameter that cuts the paragneisses of the "Rock Complex" (nAroc) and the migmatitic gneisses of the "Bétulaie Complex" (nAbtu) in the area of Rocher Lake (NTS sheet 32K09).

This convert was originally described as the "Rock-Kenonisca Massif" by Franconi (1974) in his report on the mapping of the western half of the Frotet-Evans volcano-sedimentary band.

It was renamed "Rocher-Quénonisca Intrusive Suite" by Brisson (1998) when mapping the Lac Rocher region (NTS sheet 32K09).