Saw to bright white circular/spherical shapes in the sky to the southwest of Mt. St. Helens.My wife and I camped along the bank of the Muddy River near Lava Canyon in the Mt. St. Helens national volcanic area. To the southwest of our campsite I saw at about 70 degrees above the horizon what initially appeared to be a meteor, but without the tail, traveling straight down towards the horizon. The object then slowed and brightened to a pure white and seemed to enlarge in size to a perfect circular shape although I suspect it could have been spherical. It then continued to travel towards the horizon in a straight line. After about 15 seconds it dimmed in brightness and disappeared.About 5 minutes later there was another bright white circular/spherical object that was traveling from north to south just above the horizon to the east. It moved up and down in a way I have never seen any aircraft or helicopter move before. It got to a point to the east of us, dimmed and shot up and out of sight. Neither object made any noise, and the light they emitted did not flicker. I work in the aviation industry and have seen many different types of aircraft. These objects were definitely NOT aircraft, helicopters, satellites, meteors, or any other object I have ever seen before. I have spent a lot of time outdoors and watching the sky. This was the first UFO sighting I have ever had.