Mt. Ranier and Mt. Saint Helens are a must see.
Pikes market and the Space Needle are pretty cool as well.
Be prepared for rain-lots of it.
1 day in the city is enough to see it all- spend the rest in the beautiful mountains. Best hiking trails on the West Coast. St. Helens is still haunting after all of these years.
https://www.seattlemet.com/articles/...ns-are-waiting