This might pass for a spooky Halloween mask but for its odd setting, attached securely into a bush of wild roses. I’m fairly sure this is a paper wasp nest. Nobody came or went while I was photographing, so there were no clues there. It was on the large side, about eight inches tall and perhaps six inches wide. Notice how it’s constructed completely around branches of the rose, with a “front door” opening at its base. Much as we prefer to dislike wasps and yellowjackets, they are beneficial insects that eat pests that can damage trees and shrubs. Here is more information from the Washington State University Cooperative Extension.
Here’s another view that shows more of the setting, surrounded by ripening rose hips. Though the insects abandon the nest around now, it’s not a bad neighborhood if you’re an insect looking for a nice spot. This is not near any human homes.