It was saucer-shaped with multi-colored lights, it made no sound and appeared to be bigger than a large helicopter.

Tusayan is a little tourist town near the South Rim entrance to the Grand Canyon.  I was walking across the street towards Papillon Helicopters.  Noone was flying at the time and the town was pretty deserted as it is every winter. The sun was going down, but there was still plenty of light out. I looked east out over the helipads and saw a saucer like shaped ship hovering over the tree line. I looked up and down the street to see if anyone could see this and noone was around. The ship sailed towards me without a sound.  There were a lot of different colored lights around the middle of it that seemed to be slowly spinning or pulsing around the craft. It appeared to be flying about 50 to 75 feet off the ground and was bigger than a large helicopter. The ship hovered over the helicopters for what seemed like three or four minutes and then slowly ascended up and back over the tree line. It was totally silent and I didn't feel any fear, it was just hard for me to accept that what I saw was real.
Date is approximate.  PD