Mary Lucille Sloan, disappeared September 3, 2015, Columbine area, near Mount Graham, Arizona

Revised July 2024

53-year-old Mary Sloan, went on a group trip to Mount Graham in Arizona on September 3, 2015, in the Columbine area. The eight hikers pitched camp off of a Forest Service access road, not at an established campground, and Mary was last seen at around 8.30 pm when several of the group went to sleep. The site was about a quarter-mile from Grandview Peak Road and about two miles from Riggs Lake and was situated close to a steep cliff. The area is isolated and some way up a curving mountain road.

Mary was still dealing with the loss of her husband, who passed a few months before the trip.

The next morning, Mary was not in her tent, and her cell phone, purse and bag were left at the campsite. It appeared that she had not slept in her tent. She had vanished. She wore a green shirt and blue jeans the last time she was seen. 

A ground search began on September 4, 2015, and Arizona Department of Public Safety helicopter crews were dispatched on September 6th. Search and rescue personnel from Maricopa, Cochise and Pima counties continued the search along the mountains and cliffs on September 8th. 

Graham County Search and Rescue Coordinator Lt. Jerry Nelson said rescue teams from multiple agencies combed the area the best they could but could not find any evidence of her whereabouts. Cadaver dogs from Maricopa County were used, and one appeared to have a hit near the cliff that was the original base of the search. Mountain rappelling teams were called back in, and one of the cadaver dogs was also roped down the side of the cliff to locate Mary. The cliff area was at about 9,400 feet and dropped down through some catch areas to the base of the mountain at about 3,000 feet.

Search efforts were suspended on Labor Day because of limited resources, but Nelson said they would resume on Tuesday, Sept. 8.

Sloan's sister, Sherrie Brown, said they are not concerned about the suspended search, "We are very appreciative of all the work they've done up to this point.”

But Mary was never found. She had disappeared off the face of the earth.

What happened to Mary Sloan?

• Abduction - The area of the campsite was very isolated, so it seems unlikely she was abducted.

• Misadventure - Did she go to the bathroom or to check out a vista, stumbled, and fell off the nearby cliff? Where is the body?

• Intentional disappearance - Did she intentionally disappear after the loss of her husband?

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The strange disappearance of Ranger Paul Fugate from Arizona’s Chiricahua Monument

The shocking disappearance of GPS Joe (Joe Domin) in the Mazatzal Mt. Wilderness

The strange disappearance of Mary Sloan from Mount Graham

The bizarre disappearance of Morgan Heimer from Grand Canyon National Park

The strange disappearance of Drake Cramer in the Grand Canyon National Park

The strange disappearance of Glen and Bessie Hyde from the Grand Canyon National Park

The strange disappearance of Floyd Roberts in the Grand Canyon National Park (Member only)

The agonizing disappearance of Khayman Welch in Tonto National Forest

The shocking disappearance of David Barclay Miller

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Sources

https://www.pappyspost.com/missing-hiker-mary-sloan-arizona/

https://www.kold.com/story/29974744/tucson-woman-reported-missing/