Douglas fir Douglas-fir forest is the primary habitat of the red tree vole ("Arborimus longicaudus") and the spotted owl ("Strix occidentalis"). Home range requirements for breeding pairs of spotted owls are at least 400 ha () of old growth. Red tree voles may also be found in immature forests if Douglas-fir is a significant component. The red vole nests almost exclusively in the foliage of the trees, typically above the ground, and its diet consists chiefly of Douglas-fir needles. A parasitic plant sometimes utilizing "P. menziesii" is Douglas-fir dwarf mistletoe ("Arceuthobium douglasii"). The leaves are also used by the woolly conifer aphid
Steamboats of the Lower Fraser River and Harrison Lake draft steamer. A Hudson's Bay fort at Fort Langley, sat some inland from tidewater. Regular steamer service ran on the Fraser River as far as Yale and also shortly afterwards via the Harrison River up to the head of Harrison Lake, where a townsite named Port Douglas became the port of disembarkation for the Douglas Road, also known as the Lakes Route or Lillooet Trail, which ran via a series of lakes and wagon-road portages to Cayoosh Flat, the other major boomtown of the early gold rush alongside Yale and Port Douglas. One Cariboo Gold Rush diarist noted In 1881