I was camping in a small camp trailer with my wife and 2 week old infant son near dowdy lake at red feather lakes colorado. even though it was early in the season we went past the regular campground and set up in the trees about 100 yards beyond the improved camping area. it rained off and on from a couple hours ending at approximately 9:30 p.M. baby was asleep and we went to bed at approximately 10:00 p.M. within about 10 minutes we heard a sound which is hard to describe as it was different from any other sound i had ever heard. we both froze immediately and did not move again during the main time of the event. we were both in a state of terror and i could not move until the object began to fly away. there was a red glow and the shadows changed as it settled to the ground. the sound was a high pitched whirring/ mechanical/metallic sound. the shadows moved again as the object made a higher pitched sound and rose out of the trees and i could move again. as i sat up i saw a glowing red orb, slightly disc shaped fly from nearly overhead to a spot approximately 5 miles south in about 5 seconds at which point it settled again beyond a ridge in that direction. we saw or heard nothing else that night. the next morning i found a circular spot 30 or 40 feet from the camper. the soil there is granular and sandy and it had been tossed to the outside of the circle like what a dirt bike would move the soil but there was no start point or end point and it was perfectly round. also the soil in the groove and the entire center of the circle was dry even though the rest of the soil around was still wet from the rain the evening before. we left shortly after first light still frightened. i stopped at the ranger station and asked if there had been any aerial vehicles in the area the previous night, like a helicopter or something but they said no.