Lower Campbell Lake is located approximately 10 kilometres (6.2 mi) west of the city of Campbell River. It makes up the southern portion of the Sayward Forest Canoe Route. The lake has a surface area of 2,694 hectares (6,660 acres) and has a mean depth of 17.1 metres (56 ft), with a maximum depth of 75.6 metres (248 ft).
Its outflow is the Campbell River, which flows in from Upper Campbell Lake through the Strathcona Dam, and out via the Ladore Dam into John Hart Lake.[1] Other tributaries include the Beavertail, Fry, Greenstone and Miller creeks, with water from the Salmon and Quinsam rivers diverted into the lake. Prior to the construction of the dam, Lower Campbell Lake had a surface area of 1,075 metres (3,527 ft). The lake lies in the Coastal Western Hemlock Biogeoclimatic Zone.[2]