I’m hoping someone can identify the bird who built this (abandoned?) nest. It was photographed 10/12/2019 the west side of the Cascades, along the Aufderheide Scenic Byway between Wesfir and McKenzie Bridge. This route is also the southernmost leg of the West Cascades National Scenic Byway. It was located about 10 yards away from the Roaring River, on a wooded slope and about 3 feet off the ground in a vine maple. I wish I had something in the picture to indicate the scale, but the nest cavity was between the size a golf ball and a tennis ball so I imagine the bird was approximately sparrow to robin-sized, but I am definitely not an expert on birds.