Two UFOs similar in nature were moving erratically, stopping on occasion, fading in and fading out, changed directions suddenly, and would go further away and return closer, rise and fall in altitude slowly and quickly...almost as if they were monitoring the mountain range. Once the disappeared (about 1.45 hrs)I went back inside and have bee watch for them about every hour.Nor is this my first sighting in the Rockies, or elsewhere in the world. I lost 2 hours coming home last Friday night from the UFO Watchtower Conference about 2 hours after I had sighted a bright UFO similar to the ones I saw today, in what would have been approximately the same area these two were in. I left the Watchtower at 2:15 am Saturday morning,29 August 2016, and arrived home (52 miles) at 5:25 am Saturday morning. I looked at my clock, as it was dark on the south side of Poncha Pass headed north, and when was coming down into Poncha Springs, I looked at my clock again, as I noticed there was a lot of daylight on the north side of the pass.