UFO Sighting in Seattle, Washington on 2017-06-22 16:15:00 - Very large disc shape ,dark in color.Staionary .Just over olympic moutains.Blue skys ,no clouds.

I was driving home from work to everett from the bellevue area on 405 north about 4:15pm. observed a dark disc shape hovering over the olympics mountains. it must have been huge because it was at long way away.I lost sight because of trees. after about 3 to 4 minutes we got another glimpse. this time my passenger saw it too . it had not moved from its original position.We only saw it twice because the trees obstructed our view.Colud not get a picture cause we were driving and each sighting only lasted a 3 or 4 seconds.