This is Beacon Rock in the Columbia River Gorge. This is likely the single hike I have done the most times. It is a unique and spectacular trail.
This is a rails to trails conversion that runs for over 50 miles. I have done all of it on my bike.
This lake is a couple of hours away from my house, but it is a beautiful location. 14 mile hike around the lake. https://portlandgeneral.com/about/parks-campgrounds/timothy-lake
This is a unique location with good views.... I believe. The last time I was there the visibility was awful. :-)
There are numerous hikes around Mt St Helens. There are two major access points, North and South.
Fort Stevens State Park (OR) and Long Beach, WA both have huge beaches that are very nice for walks, pretty much as far as you want to go!
There is really not much that is special about this park, it is just a nice walk in the woods. But it is the closest place to see old growth Douglas fir.
There are limited trails on the mainland side, but Tenasillahe Island has a six mile levee around it that is in good shape for a hike. It is a road, not single track, and is mostly mud and grass with a few gravel sections. The island is only accessible by boat.
I lived in Vancouver and ran the trails in this park numerous times. It is a very nice park, wooded with a creek.
I will add more hikes as I have the opportunity. There are literally hundreds in this area, and I have hiked many of them. But it will take me some time to get pictures and add to this page. I would like to only add pictures I have taken. Sorry for the delay!