A very bright white light traveling west to east moving very fast but jerkily and veering slight north and then south as it went.Conejos Campground, Rio Grande National Forest, Southern Colorado. Altitude approx 8800ft. GPS Coordinates are 37’ 10.216N and 106’ 26.579W. My wife and I were camped out in the national forest campground. We were walking in the campground at approx 8:30PM. Due the the canyon depth the sun is gone quite early. However the stars were out and you could easily see the Milky Way and Venus just south of overhead. The area is quite forested but I looked straight up and saw a bright white light approx 2x the brightness of Venus. It was traveling west to east at high rate of speed but jerkily veering slightly north and south with each jerk. It was gone over eastern canyon wall in approx. 20 seconds. It dimmed slightly as it moved east. I assumed that is was quite high and still reflecting sunlight. But that is only an assumption. We asked a gentleman also in the campground the next morning and he had seen it too. But he saw as it came over the west canyon wall and till about straight up when he lost it due to the trees. There was no sound following as you would expect. It was not a satellite, as we had watched one from north to south only a few minutes before. Its as also silent (of course) but moved at about half the speed and much dimmer. It’s path was smooth and steady as opposed the jerky slightly side to side movements of the light we are reporting. It did not move as fast as a meteor and it’s movement was erratic rather than steady.