Two lights hoving in two diffent parts of the night sky, changing colors, slightly shifting about fixed points.My son and I were tenting for the night at the U.S. Forest Service's public campground at Big Sandy Opening, Wind River Range, Bridger National Forest. I had been awakened by the sound of a large animal, possibly an elk, moose, or bear fording the river about 75 to 100 yards away and got up to see what it was. My son joined me. Never saw the animal, but started looking up at the night sky. It was clear and the stars were bright. There was a waning moon rising. Two other objects caught our attention. One seemed to hover over the south end of the range and the other, off to the left, appeared to be over the central part of the Wind River Mountains. At first glance they both looked like stars or planets. However, both "danced" around a bit, entirely unlike every thing else in the night sky. These two lights did not act like airplanes. And the Mountains over which these appeared are over 13,000 feet above sea level, so it was doubtful they where helicopters. There was no sound except the nearby stream and occasional sounds of wildlife moving around in the willows down by the bridge. The two odd lights both rapidly changed color; red to blue, to white, to ornge, over and over in very short repetitions. Now, weeks later, I can't be sure what order the colors appeared in. But it was very strange. We watched for about half an hour, until we just got too tired. We had a big day hike planned for later that morning, and needed to get some sleep. I thought it was a curious coincidence that we had been told the day before that there were no motel rooms available in nearby Pinedale, Wyoming, because of a U.S. Air Force conference taking place there that week. I have no idea what it was we saw, but my first guess would be some experimental man made aircraft. I don't personally believe in space alliens visiting earth and all that nonsense.((NUFORC Note: Witness indicates that the date of the incident is approximate. PD))((NUFORC Note: Stars? PD))