Columbia Gorge is about 30 minutes outside of Portland and has a ton of waterfalls- the most spectacular of which is probably Multnomah! There's so much worth seeing in this area.
Portland has various food truck pods, which are a great way to try a bunch of different kinds of food all in one place! Or I guess just one kind, but we somehow always end up ordering too much food.
A really cool waterfront park for people and bridge watching.
We went here the first time we ever visited Portland and loved the vegetarian biscuits and gravy.
Voodoo Doughnuts has a bunch of different funky donut designs and flavors. Look for pink awning
A really, really big bookstore.