If you love waterfalls this is the place to be. You would have seen lot of waterfalls but this is quite different from others. There are miles long trials and some of them are not family friendly and its a quite a bit of walk. The waterfalls are such you can get to the back of the waterfalls as you walk. giving a spectacular view.
You can have a barbeque in the silver state falls park. This is mostly a one to two three day affair based on where all you want to visit. Go on a summer day otherwise trekking can be difficult because most of the trekking , hiking path are non paved. But there are several waterfalls of different varieties and varying sizes.
This is one and a half hour drive from Portland city.