What's my camera doing in Washington!? Could be many things from the.. um.. quality photo. I see you've already taken a fork to it; make sure you wash it well before you eat it! oke:
looks to me like the common West Coast, erosion-controlling, mat-forming, invasive iceplant, Carpobrotus (or Mesembyranthemum) edulis, from South Africa.
Are you seeing it in Seattle? That seems cold for it...