This Autumn 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
california white oak, valley oak, valley white oak, roble, quercus lobata, ponderosa, ponderosa pine, western yellow pine, bull pine, pinus ponderosa, mahogany, and mahogany tree.