Here's Lobaria pulmonaria (Lungwort), with a spot moistened to be sure it turned bright green! The ruffled edges had me confused for a moment. It must have fallen from a tall tree along the Sol Duc trail.
"On Quercus agrifolia trunk bark. Mid-late mature dwarf forest chaparral of Arctostaphylos spp. /Quercus chrysolepis/Quercus agrifolia/Torreya californica; occasional Chrysolepis chrysophylla. "
"On Old-growth Quercus kelloggii branch bark. Old-growth black oak woodland on moderate (20-25%) north aspect slopes. "
"On Trunks and branches of Umbellularia californica and Quercus agrifolia. Boulder-strewn mixed oak wodland adjacent to Pseudotsuga menziesii forest and open grassland. "
Lobaria is a genus of lichens commonly known as "lungwort" or "lung moss" as their physical shape somewhat resembles a lung. Lobaria species are unusual in that they have a three-part symbiosis, containing a fungus, an alga and a cyanobacterium, the presence of the cyanobacterium allowing nitrogen fixation.