Was hiking in petroglyph national monument outside albuquerque, nm (piedras marcadas canyon) on saturday, may 20. at approximately 4:30 p.M. local time i was returning to the trail head when i noticed a bright pulsating light (pulsating every 5-10 seconds) to the south of sandia peak (east of my location). had my camera with zoom lenses and was able to capture several photos of the object. object was an estimated 10 miles from my location but could easily be seen. at first it was ascending below mountain peak, and i wondered if perhaps it was a reflection of the sandia peak tram (however, this was the wrong location for the tram). it was also much too large to be the tram. as object pulsated (perhaps it was spinning slowly), i attempted to capture photos of the craft. stopped other hikers and pointed the object out to them also. object quickly ascended above the sandia mountains, continued to pulsate. after several minutes, it’s altitude lowered – or perhaps it was moving east and merely appeared to be at a lower altitude. object suddenly disappeared. i am attaching a couple of photos, including a few i applied filters to. several are zoom shots; i have the originals should you like to have them.