I was in the back yard. damn it was bright. not a plane, too large, too fast, too high and no sound for the entire pass. no engine noise and no sonic boom. it passed over in a straight line from first sighting at elevation about 25 deg to loss of sight over the horizon in about 2 minutes. apparent size didn't change to horizon so probably not a drone. at that height and altitude the horizon is well over 200 k from here. the were 2 commercial jets that must have seen it. i checked flight radar 24 immeadiately - qfa497 at 30k ft and jst611 at 35k ft.