Eagle Creek begins as many tiny streams that drain the west and southwest sides of Burnaby Mountain. The lands on the mountain are protected as part of the Burnaby Mountain Conservation Area. Below the protected area, those tributaries of Eagle Creek that emerge from the forest flow through land that has been developed for residential purposes. At times the creek is culverted, at times it is channelized, and at other times it is allowed to flow almost freely. Here the dominant flora are those typical of disturbed sites in the Fraser Valley.