PDX is not in Washington county. PDX is Multnomah county.
Oregon does not recognize any other states CHL/CPL/CCW...you cannot LOC in Portland or Beaverton legally. Additionally Portland has an arguably illegal ordinance prohibiting the carry of a loaded magazine for a sidearm you are carrying.
I have had encounters with Portland Police while UOC and there were no drawn guns, no tackles and no screaming....for the most part they were very polite in their attempts to violate my rights.