The Alouette River is formed at the confluence of the North and South Alouette Rivers. The smaller of the two, the North Alouette flows from Jacobs Lake south to its confluence with the South Alouette. The river flows over a minor set of falls about halfway from its mouth. The South Alouette originates on the slopes of Mount Robie Reid and flows into Alouette Lake. After exiting the lake the river flows west before converging with the North Alouete. From there, the river flows west to join the Pitt River. The Pitt River flows south to join the Fraser River east of Vancouver.