Bob, I lived in Oregon and remember the stats -- it has a greater degree of environment/weather variety than any other state -- that Nasa uses Eastern Oregon to simulate the lifeless Moon environment. I used to live in Hood River and Portland and my wife worked in The Dalles, the difference in weather been Portland the The Dalles is immense.
(I can't find the best link, this is for a Washington State area, but I remember a similar one in Oregon.)
You can do hikes on that trail that starts in Portland and goes for 45 miles NW of Portland, we used to hike that forest trail all the time. Get the book, 60 hikes within 60 miles of Portland.
When I lived in Portland, we always laughed, if you don't like the weather in Portland, wait 30 minutes.