The can't miss is going to Pike Place Market, then down to the waterfront. Pike Place is still very Seattle, from the quirky shops to the fresh fish market and all the places to eat and snack at in the area. Very unique. I would start with going there and the water front as it may have you coming back for the next few days if anything for breakfast or coffee.

If you were to be staying the entire 12th I would suggest going to the Sounders game on the eve of the 12th. Regardless of if you like soccer or not the experience with the crowd is probably the second best in the country, next to Portland and the Timbers! (Timbers fan here). The crowd and noise and energy level will be amazing.

I also suggest that you find some local brew pubs. Some of them have pretty good food as well as great craft beer. Two things that we are certifiably serious about in the PNW are our Coffee and our Beer.

If you can do a boat/ferry trip on a nice evening or drive out to Alki Point in West Seattle so you can see the Seattle lights at night from a distance.

Mt Ranier is a bit of a drive, but a pretty drive and it is pretty amazing sight to see. As is Snoqualmie Falls to the north east. If you are into the natural wonders.

Have a great trip,
Todd

I prefer the Isle seat