Three of us from our local astronomy club (SW Washington Stargazers) made it up to Larch Mountain, Oregon
for what we hoped would be an evening of dark sky observing. Unfortunately the sky was almost 100% overcast (10:30pm) when we made the decision to give up. Of course, by the time we were packed up and ready to leave, the sky began to show some signs of clearing in the West.
It's too bad. It is a good viewing spot......dark with good viewing in every direction from about 20 degrees above the horizon on up. Trees ring the large gravel parking lot.....eliminating the view of the horizon. Not a problem as far as I am concerned. Viewing on the horizon is sub par anyway. It is also only 45-50 minutes from the Portland metro area.
By the time I made it home, the sky was partially clear, but an hour later it was pretty much 100% overcast again.