If you can make it over to the Columbia River Gorge, it’s amazing and one of my favorite places. My family is mostly situated around Portland and I make the trip every time I can.
If you can get there early in the day and get up to somewhere with a view (I get the trail names mixed up, but Devil’s Rest I believe will work) then watch the clouds roll into the valley, it’s worthwhile.
There’s also Multnomah Falls which has a trail to the top, and a very cool building with a restaurant in it at the bottom. There are probably a dozen falls within a couple miles of here and it’s a beautiful drive.
Vista House is worthwhile as well, but it’s more like 10 minutes unless you want to just hang out and observe. I like sitting there, but wouldn’t even stop if it wasn’t nice out. I’ve been there in the rain and it’s just a small building filled with tourists (not badmouthing, just crowded) at that point. I’d rather climb something, you may too.
Anyway, there’s tons of guides on the internet and it’s only an hour or so outside Portland. I’d highly recommend it.