Robert Lugo was 29 when he left for a short backpacking trip in the Mountain Green area of Utah in the late summer of 1986. He told his mother he would go out on a Wednesday and return that Friday. At the time he was described as a Hispanic male, six feet two inches, about 200 pounds, with brown hair, brown eyes and a moustache. He was believed to be wearing a grey sweat suit and a maroon jacket and carrying a green backpack.

A few days after he failed to return, a local resident found his motorcycle abandoned in the Highlands of Mountain Green and his mother was notified. That discovery prompted an extensive search and rescue operation using dogs, airplanes, helicopters and several hundred volunteer searchers, but no trace of Robert or his belongings was ever found. Beyond the motorcycle, there are no publicly reported clues, and what happened after he parked and went into the mountains remains unknown.

Did anyone in the Mountain Green area in 1986 see Robert or notice anything unusual around the Highlands that week?