conifer England english flowers forest Great Britain natural nature pine rhodedendron rhododendron shrubs spring Surrey trees woodland exercise path shadow sunlight Sussex track walk winter blue canada conifers lake landscape mountain peak Rockies Rocky Mountains shore snow summit Betula birch deciduous trunks white current flow green river summer view water fall mountains rocks scenics tree brown ground mount sky Fir game mouflon national reserve nobody ram sheep spruce untouched wildlife boardwalk ecology ferns habitat moss temperate trail Vancouver Island wild