Approximatly 5:30 pm on sunday 7/13/2014 while playing golf at mt dell gc my son spotted a slow moving object heading up the canyon and north. I also was able to observe the object with the naked eye and immediatly knew it was not a normal aircraft. I happen to have a two eyed binocular type golf range finder that I also used to observer the object ar a closer range. The object had a unique shape similar to the old appolo lunar landing vehicle but without the legs to land on. I was metallic looking with a grey or charcoal color. The object pulsated a bright white light that appeared to have either been self contained or sunlight reflection. I observed the light coming from different sided of the object so my opinion is that it was not a sunlight reflection. We both watched it for about 20 minutes as it moved north up the canyon then west over some foothills then it appeared to move higher then lower then dissapeared behind the foothills. It reappeared just above the foothill and I was able to take a few minutes of video on my iphone before it moved out of site. The object appeared to be in survelience mode moving slowly and not making any fast moves, turns or evasions. I have inspected the video I shot and did get the object recorded but it does not appear on the video very clear but one can see the object moving from left to right just above the foothills. I would estimate the distance as about 5-10 miles from where I located. Hope you find this interesting!