I was there for one day and I could see Mt Hood quite clearly for pretty much the entire time I was there, and that's like, 30-40 miles East of downtown isn't it?
As opposed to Seattle where I was before and after Portland, (that's where I drove from,) where Mt. Rainier was only visible on the clearest days. The top was in the clouds when I returned from Portland. I think Rainier may be 5 or 10 miles more distant, but the air is definitely clearer in Portland.