It isn't my backyard, but it is somebody's. Both in Oregon & Northern California, they have found members of a new family of spiders. This is pretty big, Family is 2 levels above Species, so there could be tons (gobs? bunches?) of species in this new Family, though that does seem unlikely.
Article, which has a picture, is here
Orangish and cave dwelling, not black and hairy and crawling up your wall, so no need for the nuclear option: