In my early 20's I was camping with friends on the a sandy bank of the Snake river in ID. We getting ready to sleep and were all laying on our backs looking up to the sky just bullshitting when all of a sudden I spotted a large orangish yellow orb come into view. It was sighlty triangular and travelling at a steady pace over the river. My friends at first for whatever reason didn't notice, but I was so shocked all I could get out was "thats not a airplane, thats not a airplane." Then they noticed it too, keeping its path, silently in a straight line over us to other side of the river and then fading into the sunset.