Brewster Lake is a lake on Vancouver Island northwest of Campbell Lake and north west of the city Campbell River.

Brewster lake is a part of a chain of lakes within the Sayward Forest Canoe Route. One of three largest lakes on the route, Brewst paddle with a 0.3 km portage at the most southern tip to Gray Lake and a 2.3 km portage at the most northern shores to Surprise Lake. Brewster is well known for its year round good fishing for cutthroat and rainbow trout and Dolly Varden.

• List of lakes of British Columbia

• The Sayward forest Canoe Route: https://www.gocampbellriver.com/files/MapsForDownload/SaywardForestCanoeRouteMap.pdf