Multiple Star Like Phenomena

While sitting in my backyard last night with my son, girlfriend and a family friend my son brought some interesting action going on in the skies.  He noticed some star like "things" that were coming up from the horizon, and then disappearing up into the night sky.  These were not satellites.  In fact we saw one fly from one end of the horizon to the other during this event.  The distance was completely unknown as they only appeared to be stars.  The behavior was this.  One "object" would rise up from the horizon.  It would go straight up vertical around the same speed as a satellite would move, but it would disappear.  Then another would come up from the horizon and do the same thing.  Go straight up vertical and disappear.  Some times there were two that were visible at the same time, but most of the time it was only one.  My son said he counted about 8 of them before he brought it to everybody else attention.  I personally witnessed, I'! m guestimating around 15-20 of these anomalies, maybe more.  We do a lot of sky watching.  Especially camping up around Mt. Adams.  We know the differences between an airplane (flashing lights, sound) from a satellite.  I have never seen a satellite behave in this manner.