Fish up in the NW are in specific spots, especially the bigger ones. This year, there have been tons of little guys from 4 to 8 inches, which bodes well for the future. Any small mayfly nymph pattern will catch these fish. The big ones have been absent all summer in the heat, but some should show up in the fall. It is a tough stretch, but putting in time will reap rewards. Just have less expectation. especially in terms of size, than further south.