This annual event is held in Kirkland, WA USA. This year's marque is Ford, and the show will be held on Sunday, September 12th.
On my daily stroll during lunch today, I saw #168 at the local detail shop. I'm making the assumption that it is being prep'd for the show as I have not seen the car out and about for a while.
I've had the chance to walk through the owner's collection, and there are several very nice pieces!