Beetle Identification - Oregon
I think this may be a male of Trichocnemis spiculatus (Cerambycidae, subfamily Prioninae). This species is known from Western USA/Oregon, based on this key: Screening Aid for the Cerambycidae of the Western U.S.A. (from Oregon Department of Agriculture). By overall appearance, this species fits well. However, females have more pronounced spines at the sides of the pronotum, which points to a male for the individual in your picture.


(picture from http://cerambycidae.org/taxa/spiculatus-(LeConte-1851), also more pictures at bugguide.net)