This Kissing photo contains
beech, beech tree, sitka spruce, picea sitchensis, american white birch, paper birch, paperbark birch, canoe birch, betula cordifolia, and betula papyrifera.
There might also be
ponderosa, ponderosa pine, western yellow pine, bull pine, pinus ponderosa, douglas fir, bridle path, and bridle road.