The entirety of the Eagle Creek watershed is in the coastal western hemlock biogeoclimatic zone of British Columbia. The protected lands of Burnaby Mountain, as well as the lands of Burnaby Lake Regional Park are forested with a second growth forest that primarily consists of bigleaf maple, red alder, western hemlock, western redcedar, and Douglas-fir, with an underbrush of salmonberry, Indian plum, red elderberry, and other shrubs and herbs. Mammals found here include the Douglas squirrel, black-tailed deer, coyote, and raccoon. Many birds and amphibians also inhabit the watershed.