On 11/7/12 at 11:45 pm, the smell of skunk filled the valley where my neighborhood is located. i spotted a low flying triangle ufo, below tree line gliding silently behind the trees. I did not notice it at first. I had walked right up beside it when i noticed something in my peripheral vision.It was at that moment when the object appeared to silently glide west and then turned at a 45 degree angle to head north. it had what appeared to be cloaking ability. It appeared to have a plasma screen like outer surface that changed color like an octopus that is camouflaging itself might behave. The colors on the surface of the object appeared to be dark brown/red on a dark black background. I was within 200 feet of this object. It was the size of a large drone. It also had an almost organic quality to it's shape/design. This sighting was about 10 seconds in length.
This was at the Howard Hueston Dog Park in Boulder.
This was reported to National UFO Reporting Center.
I was compelled to report this sighting because there was another report on the NUFORC website that closely matched my observation in Boulder CO a few days earlier.
This was my second UFO sighting of a low flying triangular craft.