Rust on limbs
Thank you for the images of several different kinds of lichen,including a bright orange one, commonly found on slow-growing trees and shrubs.
Lichen is very common throughout the moist portions of Oregon. Some forms are quite fanciful. (See "What are lichens" https://www.fs.fed.us/wildflowers/beauty/lichens/whatare.shtml
Also see "Lovely lichens lurk in your woodlands" http://blogs.oregonstate.edu/treetopics/2019/04/04/lovely-lichens-lurk-in-your-woodlands/